Download pdf - Zeitschrift für Naturforschung / A / 47 (1992) W erk wurde im Jahr 2013 vom V erlag Zeitschrift für Naturforschung ... Experimental Methods and Spin Dynamics 2 D Methods in NQR Spectroscopy

Volume 47 a Zeitschrift für Na tu r fo r schung

Inhaltsverzeichnis

1992

N u m b e r 1/2

Original Communications

(A) High-Tc Superconductors

Probing the Electronic Structure of Y - B a - C u - 0 Superconductors by Copper NQR/NMR D . BRINKMANN 1

NQR and NMR in High Tc Superconductors K . ASAYAMA, Y. KITAOKA, a n d G.-Q. ZHENG 7

Oxygen Diffusion in YBa 2 Cu 3 0 7 _ 8 Studied via 133Ba(EC)133Cs Nuclear Quadrupole Interaction W. TRÖGER a n d T. BUTZ 12

Cu NQR. Study in a High-Tc Superconductor YBa2Cu306 .1I J t

Y u . A . OSSIPYAN, O . V. ZHARIKOV, V. L . MATUKHIN, V. N . ANASHKIN, I . A . SAFIN, A . I. POGORELCEV, a n d G . B. TEITELBAUM 21

Cu-NQR Frequencies and Linewidths in High-!TC Su-perconductors S. GÄRTNER, H . RIESEMEIER, Y. KITAOKA, V. MÜLLER, K . LÜDERS, E . KALDIS, a n d S. RUSIECKI 27

(B) Glasses, Ceramics, Semiconductors and Metals

NQR Studies of the Structure of Glasses and Crys-talline Compounds P . J. BRAY, D . H . LEE, D . - G . MAO, G . L . PETERSEN, S. A . FELLER, D . L . BAIN, D . A . FEIL, P . PANDIKUTHIRA, a n d S. NIJHAWAN 30

14N Quadrupole Interactions in Nitrogen-Containing Ceramics. Effects on 29Si NMR Line Shapes and Structural Implications A . OLIVIERI 39

Electric Field Gradient in Aluminium due to Vacancy and Muon M . J. PONNAMBALAM 4 5

Nucleus-Carrier Interactions in the Group V Semimetals: Dependence on Temperature and Pres-sure J. M . KEARTLAND, I. P . GOUDEMOND, G . C . K . FÖLSCHER, a n d M . J. R . HOCH 49

(C) Inorganic and Organometallic Compounds

Cesium Iodometallates(III), Cs 3 M 2 I 9 , with M = Rare Earth. A Structural Investigation by 127I NQR M . LENCK a n d AL. WEISS 54

NQR and X-ray Studies of [N(CH3)4]3M2Y9 and (CH 3 NH 3 ) 3 M 2 X 9 (M = Sb, Bi; X = C1, Br) H . ISHIHARA, K . WATANABE, A . IWATA, K . YAM AD A, Y. KINOSHITA, T. OKUDA, V. G . KRISHNAN, S . -Q . DOU, a n d AL. WEISS 65

Coordination of Ortho-Chlorines in Copper(I) and Silver(I) 2,6-Di- and 2,4,6-Trichlorophenolates G . WULFSBERG, D . JACKSON, W. ILSLEY, S . - Q . D o u , AL. WEISS, a n d J. GAGLIARDI, JR. 75

The Nuclear Quadrupole Interaction of 199mHg-Cys-teine and 199mHg-tert-butyl-mercaptide T. BUTZ, W. TRÖGER, TH. PÖHLMANN, a n d O . NUYKEN 85

The l l l m C d Nuclear Quadrupole Interaction in CdCl2 and its Monohydrate TH. FRAENZKE, T. BUTZ, a n d A . LERF 89

1 4N NQR in 1,10-Phenanthroline and Dicyano bis(l,10-phenanthroline)iron(III) J. MURGICH, Y. ARAY, E . O . RICO, a n d I . BONALDE 96

8 1 Br and 1 2 7I NQR Studies of (CH 3NH 3) 2HgBr 4 and (CH 3 NH 3 ) 2 HgI 4

H . TERAO, T. OKUDA, A . MINAMI, T. MATSUMOTO, a n d Y. TAKEDA 99

This work has been digitalized and published in 2013 by Verlag Zeitschrift für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution-NoDerivs 3.0 Germany License.

On 01.01.2015 it is planned to change the License Conditions (the removal of the Creative Commons License condition “no derivative works”). This is to allow reuse in the area of future scientific usage.

Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschungin Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung derWissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht:Creative Commons Namensnennung-Keine Bearbeitung 3.0 DeutschlandLizenz.

Zum 01.01.2015 ist eine Anpassung der Lizenzbedingungen (Entfall der Creative Commons Lizenzbedingung „Keine Bearbeitung“) beabsichtigt, um eine Nachnutzung auch im Rahmen zukünftiger wissenschaftlicher Nutzungsformen zu ermöglichen.

nhaltsverzeichnis VII I

A 6 3 , 6 5 C u and 1 2 7I Nuclear Quadrupole Resonance and X-Ray Crystallographic Study of a Low-Tem-perature Phase of the 6/s(2-picoline) Copper(I) Iodide Dimer A . HABIYAKARE, E . A . C . LÜCKEN, a n d G . BERNARDINELLI 106

/ 9Br NQR Spectra of the Impurity Molecules of Terabromides of Group IV Elements in the Matrix Crystals of Group IV Element Halides G . K . SEMIN, A . M . RAEVSKY, S. I . KUZNETSOV, T. L . KHOTSYANOVA, a n d S. I. GUSHCHIN 111

7Li-Solid-State-NMR of [Li(N,N,N',N'-Tetramethyl-ethylenediamine)] C104 and [Li(N,N,N',N'-Tetra-methylethylenediamine)2] A1(CH 3)4

T. PLETRASS, P . K . BURKERT, a n d H . H . KARSCH 117

An N Q R Study of Tetrachloride Complexes of Group IVA Elements V. P . FESHIN a n d M . G . VORONKOV 120

6 3 < 5 5 Cu and 7 9 - 8 1 ß r NQR Studies of Thione Com-plexes of Cu(I) Halides S. RAMAPRABHU a n d E . A . C . LÜCKEN 125

Bromine-79 N Q R for Uncoordinated Br~ ions in trans-[C oßr2(en)2] [H 5 0 2 ] Br2

A . SASANE, T. MATSUDA, H . HONDA, a n d Y. MORI 129

(D) Organic Compounds

Electron Effects of Adduct Formation by some Metal Halides E. A . KRAVCHENKO a n d M . Y u . BURTZEV 134

NQR Studies of Organic Compounds Containing Tetra- or Pentacoordinated Atoms of Elements of Groups IVA and VIA V. P. FESHIN 141

35C1 N Q R Spectra of Organyl(chloroalkyl) Sulfides M . G . VORONKOV, G . V. DOLGUSHIN, V. P . FESHIN, L. P . TURCHANINOVA, N . A . KORCHEVIN, a n d E. N . DERYAGHINA 147

Spatial Electron Density Distribution of Chlorine Atoms in Molecules of the Series C12C = CXX' V. P . FESHIN, G . A . POLYGALOVA, V. V. SHCHEPIN, a n d Y. E . SAPOZHNIKOV 150

Dioxin Precursors: N Q R Studies of Group 1 and Re-lated 2,6-Dichlorophenolate and 2,4,6-Trichloro-phenolate Salts G . WULFSBERG, K . SHADID, B. FARRIS, J. MONN, T. BONNER, J. YANISCH, a n d AL. WEISS 153

35C1 N Q R and Structural Studies of Chloroacet-anilides C6H3C12NHCOCH3_ J CC1 ; c , l < x < 3 D . GROKE, S . - Q . DOU, a n d AL. WEISS 160

7 9Br and 1 2 7 I N Q R of tert-Butylammonium Halides and Crystal Structure of ( C H 3 ) 3 C N H f B r e

M . SHABAZI, S . - Q . DOU, a n d AL. WEISS 171

N Q R and Crystal Structure of 4,5-Dichloroimida-zole, C 3 H 2 N 2 C1 2

S . - Q . D o u a n d AL. WEISS 177

(E) Theory of Electric Field Gradients

Theoretical Study of the Electric Field Gradient in Silver Iodide G . FRANTZ, R . LEIBERICH, P . C . SCHMIDT, and T. P. DAS 182

The Nuclear Quadrupole Moments of the 20 First Elements: High-Precision Calculations on Atoms and Small Molecules P. PYYKKÖ 189

Ab initio Calculations of the Electric Field Gradients in Solids in Relation to the Charge Distribution K . SCHWARZ a n d P . BLAHA 197

The ab initio Calculation of Nuclear Quadrupole Coupling Constants with Special Reference to 3 3S M . H . PALMER 203

1 4N N Q R and the Molecular Charge Topology in Coordinated Ammonia J. MURGICH, Y. ARAY, a n d E . O . R i c o 217

(F) Phase Transitions and Solid State Properties

Milli-Kelvin NQR: A Study of the Praseodymium Trihalides R . L . ARMSTRONG a n d S. S u 221

Electric Field Effect on 1 4N N Q R in Ferroelectric Thiourea Single Crystals H . J. KIM, K . T. HAN, a n d S. H . CHOH 227

Inhaltsverzeichnis VII

Phase Transitions in Bis(4-chlorophenyl)sulfone as Studied by 35C1 FT-NQR H . NAKAYAMA, T. EGUCHI, a n d M . KISHITA 2 3 2

NQR Study of the Pinning and Depinning of the Incommensurate Modulation Wave in the Presence of Impurities F. MILIA, G . PAPAVASSILIOU, a n d A . ANAGNOSTOPOULOS 2 3 7

35C1 NQR and Crystal Structure Studies of Salts of Chlorodifluoro- and Dichloroacetic Acid R . BASARAN, S . -Q . D o u , a n d AL. WEISS 241

An NQR and Calorimetric Study of a Phase Transi-tion in tetrakis (a-Phenylethylamine)-6w (isothio-cyanato) nickel(II)/orr/jo-Dichlorobenzene Clathrate L. PANG, E . A . C . LÜCKEN, a n d P . TISSOT 251

High Pressure Studies of Tetrachloro-o-benzoquin-one by N Q R Spectroscopy P. KOZIOL 2 5 4

NQR Investigation of the Temperature-Induced Neu-tral-to-Ionic Phase Transition in the Mixed-Stack Charge-Transfer Complex TTF-CA M . GOURDJI, L . GUIBE, A . PENEAU, J. GALLIER, B. TOUDIC, a n d H . CAILLEAU 257

Chlorine-NQR Relaxation Near the Structural Tran-sitions of Natural and Deuterated (NH 4 ) 2TeCl 6

C . DIMITROPOULOS, F. BORSA, a n d J. PELZL 261

(G) Relaxation and Dynamic Processes

Reorientational Motion of Trihalogenomethyl Groups in Organic Compounds as Studied by 35C1 NQR and 1 9 F N M R Spectroscopy S. WIGAND, T. ASAJI, R . IKEDA, a n d D . NAKAMURA 2 6 5

Chlorine Nuclear Quadrupole Relaxation and Cationic Motion in Trimethylsulfonium Hexachlo-roselenate(IV): [(CH3)3S]2SeCl6

M . KAGA, T. ASAJI, R . IKEDA, a n d D . NAKAMURA 2 7 4

Chlorine Nuclear Spin-Spin Relaxation Mechanism in Mg(H 2 0) 6 SnCl 6 as Studied by N Q R and N M R Techniques K . HORIUCHI a n d D . NAKAMURA 2 7 7

Uniaxial Reorientation of Octahedral Complex An-ions Excited in Triethylammonium Hexachlo-rostannate(IV) Crystals T. SHIMIZU, T. ASAJI, D . NAKAMURA, a n d R . IKEDA 2 8 3

Reorientational Motion of Hydrogen Bonded Octa-hedral Complex Anions in Hydrazinium Hexa-chlorostannate(IV), (N 2 H 5 ) 2 SnCl 6 , as Studied by 35C1 NQR Spin-Lattice Relaxation Measurements Y. KUME, M . TOKORO, T. ASAJI, R . IKEDA, a n d D . NAKAMURA 288

Reorientation of the CC13 Group in Chloral 4-Chloro-benzylhemiacetal. A Pulsed 35C1 NQR and X-ray Study M . HASHIMOTO, T. ISONO, N . YOMESAKA, H . NIKI, H . KYAN, a n d T. HAMAGAWA 2 9 3

35C1 NQR Relaxation in Chloral Cyclohexylhemiac-etal H . NIKI, R . IGEI, H . KYAN, T. HAMAGAWA, T. ISONO, a n d M . HASHIMOTO 299

The 35C1 N Q R Temperature Dependence of Hexa-and Octachlorocyclophosphazene A . A . KOUKOULAS a n d M . A . WHITEHEAD 305

NQR and Neutron Diffraction in Scheelites R . JULIAN, C . BROWN, M . E . SHORTREED, A . J. SZABO, B. M . POWELL, a n d S. N . STUART 308

Temperature Dependence of the Spin-Lattice Relax-ation Time of the 2 3 N a - N M R Line in N a N 0 2

M . IGARASHI, H . KITAGAWA, S. TAKAHASHI, R . YOSHIZAKI, a n d Y. ABE 313

Sodium Ion Exchange in N a t + J CZr2SixP3_ ; c01 2 as Studied by 2 3 Na Nutation N M R H . OHKI a n d N . NAKAMURA 319

Anomalous Temperature Dependence of the " T c Quadrupole Coupling and Disordering of Cesium Positions in CsTc0 4

V. P . TARASOV, G . A . KIRAKOSYAN, a n d K . E . GERMAN 325

nhaltsverzeichnis VII I

35C1 NQR and Molecular Motion in Solid C6X5C1 (X = H, F) A . D . GORDEEV, G . B. SOIFER, a n d A . P . ZHUKOV 330

(H) Experimental Methods and Spin Dynamics

2 D Methods in NQR Spectroscopy R . BLINC a n d J. SELIGER 333

Contribution of Microwave Fourier Transform Spec-troscopy to the Investigation of Nuclear Quadru-pole Coupling H . DREIZLER 342

Quadrupole Nutation N M R in Solids W. S. VEEMAN 353

NQR Imaging R . KIMMICH, E . ROMMEL, P . NICKEL, a n d D . PUSIOL 361

Weak Complexes of Dinitrogen: An Approach to the 14N-Nuclear Quadrupole Coupling Constant of Free N2

A . C . LEGON a n d P. W. FOWLER 367

Detection of Quadrupole Interactions by Muon Level Crossing Resonance S. F. J. Cox 371

Two-dimensional Exchange Spectroscopy Using Pure NQR E . ROMMEL, P . NICKEL, R . ROHMER, R . KIMMICH, C . GONZALES, a n d D . PUSIOL 382

A Simple Model to Explain 1 9F-TDPAD Amplitude Characteristics H . - R . BLANK, M . FRANK, J. HEINDL, M . KALTENHÄUSER, H . KÖCHNER, W. KREISCHE, N . MÜLLER, S. PORSCHER, a n d T. WAGNER 389

A Computer-controlled, Fully Automatic NMR/ NQR Double Resonance Spectrometer F. ZHENYE, E . A . C . LÜCKEN, a n d J. DIOLOT 395

Zeeman NQR Studies on Polycrystals of Copper Compounds, Arsenic Compounds, and Chlorine Compounds O . EGE, S. HAMAI, a n d H . NEGITA 401

NQR Spin Echo in the Effective Fields of Multiple-Pulse Sequences G . B. FURMAN, I . M . KADZHAYA, G . E . KIBRIK, A . Y u . POLJAKOV, a n d I. G . SHAPOSHNIKOV 4 0 9

Zeeman Effect of Pure NQR in a Rotating Frame (CW and Pulsed Excitation) G . B. FURMAN a n d I. M . KADZHAYA 4 1 2

Experimental Investigations of the Strong Off-Reso-nant Comb (SORC) Pulse Sequence in 1 4N NQR S. S. KIM, J. R . P. JAYAKODY, a n d R . A . MARINO 4 1 5

1 4N Fourier Transform Nuclear Quadrupole Reso-nance. Instrumentation: Measurements on Cya-nuric Chloride R . AMBROSETTI, C . FORTE, a n d D . RICCI 421

Two-dimensional Two-frequency NQR Spectroscopy V. S. GRECHISHKIN a n d N . JA. SINJAVSKY 4 3 0

The Quasistationary States in Multipulse NQR D . YA. OSOKIN, V. L . ERMAKOV, R . H . KURBANOV, a n d V. A . SHAGALOV 4 3 9

(I) NQR Database

Recent Development of Nuclear Quadrupole Reso-nance Spectra Database H . CHIHARA a n d K . MANO 4 4 6

N u m b e r 3


Shock Waves Produced by Impulsive Load: Equation of State Effects S. A . LIFITS, S. I . ANISIMOV, a n d J. MEYER-TER-VEHN 4 5 3

X-ray Emission Wavelengths of Argon, Krypton, Xenon and Curium H . KLEYKAMP 4 6 0

The Role of Singlet Oxygen in the Lyoluminescence of Saccharides E . PITT, A . SCHARMANN, a n d T. SUPRIHADI 4 6 3


On Lower Bounds for the Free Energy of the Hub-bard Model W . - H . STEEB a n d C . M . VILLET 4 6 9

Directions of the Electronic Absorption Transition Moments in co-Substituted 4-Dimethylamino-trans-Styrenes A . KAWSKI, Z . GRYCZYNSKI, I . GRYCZYNSKI, a n d J. KUSBA 4 7 1

High Resolution FTIR Study of the v8 Band and ab initio Calculation of the Harmonic and Anhar-monic Force Field of Difluoromethanimine, C F 2 N H H . BÜRGER, R . KUNA, G . PA WELKE, S. SOMMER, a n d W. THIEL 4 7 5

On the Electric Multipole Moments of Carbon Monoxide G . MAROULIS 4 8 0

Luminescence Properties and Electronic Structure of Some Quinolizinone and Indolizinone Derivatives S. BAKALOVA, P . NIKOLOV, E . STANOEVA, V. OGNYANOV, a n d M . HAIMOVA 521

The Rotational Zeeman Effect in Acetone, its ^-Ten-sor, its Magnetic Susceptibility Anisotropics and its Molecular Electric Quadrupole Moment Tensor; A High Resolution Microwave Fourier Transform Study F. OLDAG a n d D . H . SUTTER 527

The Effect of Temperature on the Fluorescence Quenching of Perylene by Tetrachloromethane in Mixtures with Cyclohexane and Benzene W. M . WICZK a n d T. LATOWSKI 533

Static and Dynamic Properties of Ferroelectric Liquid Crystals in the Vicinity of a First-Order SmA-SmC* Phase Transition R . R . NETZ a n d S. HESS 536

Raman Spectroscopic and X-ray Diffraction Studies on Concentrated Aqueous Zinc (II) Bromide Solu-tion at High Temperatures T. TAKAMUKU, M . IHARA, T. YAMAGUCHI, a n d H . WAKITA 4 8 5

Conductance Studies of Aqueous Succinic Acid A . APELBLAT a n d J. BARTHEL 4 9 3

High-Resolution Vibrational Spectra of Furazan. II. The Bj Fundamental v n at ~ 1 1 7 5 c m - 1 f rom Fourier-Transform Infrared Spectroscopy O . L . STIEFVATER 4 9 9

Bromine Spin-Rotation Coupling Constants of Cy-clopropylbromide-79Br and - 8 1 BR N . HEINEKING, J. GRIPP, a n d H . DREIZLER 507

Nuclear Quadrupole Hyperfine Structure in the Rota-tional aQ1-Subbranch of Deuteroisothiocyanic Acid, DNCS N . HEINEKING a n d H . DREIZLER 511

Liquid Crystalline Aromatic Cholesterol Derivates (In German) V. VILL, J. THIEM, a n d P . ROLLIN 515

Note

Stability of the Liquid State of Concentrated Aqueous Solutions of Lithium Salts at Low Tem-peratures T. HASEBE, R . SATO, K . TANAKA, a n d R . TAMAMUSHI 543

N u m b e r 4


On the Problem of a Finitistic Quantum Field Theory F. WINTERBERG 545

Onset of Thermosolutal Convection in a Liquid Layer Having Deformable Free Surface - I. Stationary Convection B. S. DANDAPAT a n d B. P . KUMAR 554

Onset of Thermosolutal Convection in a Liquid Layer Having Deformable Free Surface - II. Overstability B. S. DANDAPAT a n d B. P . KUMAR 561

Static and Hydrodynamic Properties of Nematic Liq-uid Crystals A . CHRZANOWSKA a n d K . SOKALSKI 565

Inhaltsverzeichnis VIII

The 1 4N Nuclear Quadrupole Coupling in E- and Z-C-Cyanomethanimine; its Prediction from Re-stricted Hartree-Fock Wave Functions and its Experimental Determination by High Resolution Microwave Spectroscopy H . KRAUSE a n d D . H . SUTTER 573

*H and 2H NMR Studies of Mixtures 2,6-Lutidine/ Water Near the Lower Critical Solution Point V. BALEVICIUS, N . WEIDEN, a n d AL. WEISS 583

Determination of the Ring-Inversion Barrier in y-Thiobutyrolactone by Microwave Fourier Trans-form Spectroscopy H . HARDER, A . G . LESARRI, J. L . ALONSO, H . DREIZLER, a n d J. C . LOPEZ 588

Preparation of Octabromoditechnetate (III, II), [Tc2Br8]3~ and the Vibronic Structure of the ö->ö* Transition G . PETERS, J. SKOWRONEK, a n d W. PREETZ 591

The Kinetics and Formation of Small Carbon Clus-ters in an Argon Matrix J. SZCZEPANSKI, R . PELLOW, a n d M . VALA 595

On the Problem of Bromide Control in a Tl3 +-per-turbed Belousov-Zhabotinsky Oscillator S. MURÄNYI a n d Z . NOSZTICZIUS 605

Scaled Quantum Mechanical (SQM) Force Field Cal-culations of the Hexathiometadiphosphate Anion p 2 s r M . YSTENES, W. BROCKNER, a n d F. MENZEL 6 1 4

Hydrogen in Electrodynamics. VIII. The Half-Integer Spin H . SALLHOFER 619

Notes

Comment on the Osipov-Terentjev Calculation of the Viscosity of Liquid Crystals V. I. STEPANOV 625

Reply to the Comment of V. I. Stepanov "On the Osipov-Terentjev Calculation of the Viscosity of Liquid Crystals" M . A . OSIPOV a n d E . M . TERENTJEV 627

N u m b e r 5


Collisional Isotropisation of a Strongly Magnetized Anisotropic Plasma within the Weak Interaction Approximation H . SCHAMEL a n d G . HÜBNER 629

Large Volume NMR Spectroscopy with a Whole Body Imager O . LUTZ a n d M . PFEFFER 637

Fluorescence Spectroscopy on UHV-Deposited Thin Films of Coronene (In German) P. FISCHER, H . PORT, a n d H . C . WOLF 643

Far-Infrared Laser Magnetic Resonance Detection of CH2C1 F. TEMPS, H . G G . WAGNER, a n d M . WOLF 660

NMR Characterization of Half-integer Quadrupolar Nuclei in Solids J. P . AMOUREUX 665

Surface Tension Around Eutectic Compositions of Molten Alkali Carbonate Mixtures K . IGARASHI, K . TAJIRI, T. ASAHINA, M . KOSAKA, Y. IWADATE, a n d J. MOCHINAGA 675

Dielectric Relaxation of 2-Amino-l-butanol U . WITT, M . STOCKHAUSEN, J. JADZYN, a n d P . K§DZIORA 678

The Rotational Spectrum of the Fluorobenzene-Ar-gon Van der Waals Complex W. STAHL a n d J . -U . GRABOW 681

Testing the Reverse Monte Carlo Method Using Scat-tering Data from Amorphous Ni2Zr M . BIONDUCCI, F. BUFFA, G . LICHERI, a n d G . NAVARRA 685

Molecular Motions in Solid [Sb(CH3)4]PF6 . A Com-bined *H, 1 9F Nuclear Magnetic Resonance and Quasielastic Neutron Scattering Study G . BURBACH, N . WEIDEN, a n d Al . WEISS 689


Solvation Structure of the Ti(III) Ion in Methanol Solutions and in Perfluorinated Ionomers Swollen by Water and Methanol. A Study by ESR and ENDOR S. SCHLICK, B. E . MYERS, L . SJÖQVIST, a n d A . LUND 7 0 2

N u m b e r 6


79Br Nuclear Quadrupole Relaxation in the High Temperature Modification of Niobium Pentabro-mide N . OKUBO, H . SEKIYA, C . ISHIKAWA, and Y. ABE 7 1 3

Molecular Motion in Solid Tetramethylammonium Tetrafluoroborate S. TORRE a n d P . FERLONI 721

A Theoretical Study of Monosubstituted Cyclo-propenyl System N . M . YAHYA a n d S. M . KHALIL 768

Factor Analysis of Long Range Substituent Effects on C-13 NMR Chemical Shifts and Target Factor Testing of Different Types of Substituent Param-eters G . F. FADHIL 7 7 5

Internal Cation Mobilities in Molten (Li,Ag)N03

and (K,Ag)N0 3 Remeasured by the Klemm Method I. OKADA a n d K . ICHIOKA 781

ESR Spectra of Para-Substituted Alkyl- and Alkyl-benzene Radical Cations in Halocarbon Matrices Y. KUBOZONO, M . ATA, Y. SUZUKI, Y. GONDO, a n d M . SHIOTANI 788

Application of the Pseudo-Spin Model to the Lowest-Temperature Phase Transition of the Mixed Crystal (NH4)2(1 _ x )K 2 xPb[Cu(N0 2) 6] N u m b e r 7/8 W. WINDSCH, H . BRAETER, and J. A. GONZALO 728 Original Communications

A Microscopic Theory of a Single Hydrogen Centre in a Magnesium Crystal M . GNIRSS a n d F. WAHL 7 3 3

Presparking Effect in Spark Source Mass Spectrome-try A . HARFOUSH a n d S. SH. SOULAYMAN 748

Theoretical Melting Curves of Alkali Halides S. SH. SOULAYMAN 7 5 3

Determination of a High Potential Barrier Hindering Internal Rotation in 2-Methylcylopentanone and a-Methyl-y-Butyrolactone by Microwave Fourier Transform Spectroscopy J. L . ALONSO, N . HEINEKING, H . DREIZLER, A . G . LESARRI, a n d J. C . LOPEZ 761

Dependence of Potential Energy on Inter-bond An-gles in Simple Molecules K . INDIRA, M . K . RUDRA WARIER, T. R . ANANTHAKRISHNAN, a n d C . M . PAUL 7 6 5

Time-resolved Fluorescence Quenching in Ultrathin Coronene Films on Silicon Substrates: Coverage Dependence (In German) P. FISCHER, H . PORT, a n d H . C . WOLF 797

An Effect of Deuteration on Ion Motions and Hydro-gen Bondings in Guanidinium Tetrafluoroborate J. W^SICKI, M . GROTTEL, A . KOZAK, a n d Z . PAJ^K 8 0 3

Determination of some Dye Parameters by Polarized Fluorescence Spectroscopy E. WOLARZ 807

Absorption Spectrum of Ni(II) Ions Doped in Mag-nesium Thallium Sulphate Hexahydrate A . V. SUBBAIAH, J. L . RAO, R . M . KRISHNA, and S.V.J. LAKSHMAN 813

Phase Transitions of Scaling Functions Derived from Experimental Time Series R . STOOP a n d J. PARISI 819

X Inhaltsverzeichnis VII

Short Range Structure of Amorphous Ni5 0Ta5 0-Alloys by Means of X-Ray- and Neutron-Diffrac-tion H . UHLIG, L . ROHR, H. -J . GÜNTHERODT, P . FISCHER, P . LAMPARTER, S. STEEB 826

Structure Investigation on Liquid Tellurium by X-Ray and Neutron Scattering W. HOYER, H . NEUMANN, a n d M . WOBST 833

Structure of Supercooled Aqueous Zinc(II) Bromide Solutions by Raman and X-Ray Scattering Methods T. TAKAMUKU, K . YOSHIKAI, T. YAMAGUCHI, a n d H . WAKITA 841

Supplement to "Some Aspects of Minimally Rela-tivistic Newtonian Gravity" K . K . NANDI 918

Notes

Brewster Condition for Planar Interfaces of Natural Optically Active Media A . LAKHTAKIA 921

Radiation Induced Colour and Crystal Defects in Topaz A . BANERJEE 9 2 3

An Electron Paramagnetic Resonance Study of Mn2 +

Ions Doped in Langbeinites T. BÖTTJER, G . LEHMANN, and M . STOCKHAUSEN 849 N u m b e r 9

Molecular Reorientation of Methanol in Mixtures with Carbon Tetrachloride R . LUDWIG, D . S. GILL, a n d M . D . ZEIDLER 857

The Microwave Spectra and Nitrogen Quadrupole Coupling Constants of Cyano- and Isocyano-pentafluorobenzene M . KRÜGER, a n d H . DREIZLER 865

Conformational Aspects of Substituents in Enamines. X-Ray Structure Analyses and Quantum Chemical Calculations G . RAABE, W. KARL, D . ENDERS, a n d J. FLEISCHHAUER 869

A Photophysical Study of Tri-chromophoric Systems Containing Two Naphthalene Moieties: Intra-molecular Excimer Fluorescence, Energy Transfer, Phosphorescence, and Delayed Fluorescence K . - D . GUNDERMANN, E . ROMAHN, a n d M . ZANDER 877

Luminescence Spectra of the Mixed Chloro-Bromo-Technetates(IV), [TcClnBr6_„]2 ' , n = 1 - 5 A . WENDT a n d W. PREETZ 882

The Electric Field Gradient at the Site of the Halogen Ion and Structure of Amino Acid Hydrobromides and Hydroiodides A . KEHRER, S. DOU, a n d AL. WEISS 887


The PN Method in the Kinetic Theory of Gases G . KÜGERL a n d F. SCHÜRRER 925

Quantum-Mechanical Concepts in the Waveguides Theory N . MARINESCU a n d M . APOSTOL 935

Peripheral Stochasticity in Tokamaks - The Martin-Taylor Model Revisited R . L . VIANA a n d I. L . CALDAS 941

Polarisation in the Temperature Equilibration of An-isotropic Plasmas U . WOLF a n d H . SCHAMEL 945

ENDOR Studies of X-Irradiated Single Crystals of Sulphamethoxazole R . KRZYMINIEWSKI a n d A . LUND 950

Comparison of Different Methods of Abel Inversion Using Computer Simulated and Experimental Side-On Data G . PRETZLER, H . JÄGER, T. NEGER, H . PHILIPP, a n d J. WOISETSCHLÄGER 955

The Inertial Effect in Rotational Fluorescence Depo-larization A . KAWSKI, P . BOJARSKI, a n d A . KUBICKI 971

Inhaltsverzeichnis

Thermodynamic Study of Ce4 + /Ce 3 + Redox Reac-tion in Aqueous Solutions at Elevated Tempera-tures: 1. Reduction Potential and Hydrolysis Equi-libria of Ce 4 + in HC10 4 Solutions B. A . BILAL a n d E . MÜLLER 9 7 4

Radiolysis of Aqueous Ethanol in the Presence of CO H . - R . PARK a n d N . GETOFF 9 8 5

Monte Carlo Simulations of Water under Supercriti-cal Conditions. II. Convergence Characteristics and the System Size Effects A . G . KALINICHEV 9 9 2

Temperature Dependence of N2-Relaxation of Rota-tional Lines of Propionitrile H . - W . NICOLAISEN, H . MÄDER, a n d F. ROHART 9 9 9

Intramolecular and Liquid Structures of Tetramethyl-urea Studied by Means of X-Ray Diffraction T. RADNAI a n d H . OHTAKI 1003

Notes

High Ionic Conductivity of L i 2 0 : B 2 0 3 : V 2 0 5

K . GAUR a n d H . B. LAL 1011

N u m b e r 10


Feynman-Kleinert's Treatment of a Class of Harmon-ic-Oscillators M . BENTAIBA, L . CHETOUANI, a n d T. F. HAMMANN 1 0 1 3

Isomerization of Diphenyl Polyenes. Part II. Fluores-cence Properties of l,8-Diphenyl-l,3,5,7-octate-traene in Poly(vinyl alcohol) Film A . KAWSKI, A . KUBICKI, B. KUKLINSKI, I. GRYCZYNSKI, a n d Z . GRYCZYNSKI 1017

Surface Structure of Nanometer-Sized Zinc Ferrite Particles by the Anomalous X-ray Scattering (AXS) Method E. MATSUBARA, K . OKUDA, Y. WASEDA, a n d T. SAITO 1023

VII

Principal Component Analysis of Chinese Porcelains from the Five Dynasties to the Qing Dynasty C. T. YAP and Y. HUA 1029

Potentiometrie Study of Magnesium Fluoro Com-plexes in Aqueous Solutions up to 473 K and 1 kbar B. A . BILAL a n d E . MÜLLER 1034

The Phase Transition of Potassium Sulfate W. KURTZ 1039

Self-Diffusion in Molten Lithium Nitrate C . HERDLICKA, J. RICHTER, a n d M . D . ZEIDLER 1047

A Contribution to the Microwave Spectra of eis- and trans-2,3-Dimethyloxirane by Fourier Transform Spectroscopy H . HARTWIG a n d H . DREIZLER 1051

A Microwave Fourier Transform Spectrometer in the Frequency Range of 2 to 4 GHz and its Perfor-mance C . GERKE a n d H . DREIZLER 1058

The Rotational Spectrum of 2,2-Dimethyloxirane H . HARTWIG a n d H . DREIZLER 1063

Methyl Internal Rotation and 1 4N Nuclear Quadru-pole Coupling from the Rotational Spectra of Ethyl Isocyanide, wo-Propyl Isocyanide and gauche- and trans-n-Propyl Isocyanide M . KRÜGER a n d H . DREIZLER 1 0 6 7

Molecular Motion in Phenpropylammonium Chlo-ride Studied by Deuterium N M R M . L . H . GRUWEL a n d R . E . WASYLISHEN 1073

*H N M R Studies on Cationic Motions in Solid tert-Butylammonium Hexachlorostannate (IV) H . ISHIDA, T. HIGASHIYAMA, N . HAYAMA, a n d R . IKEDA 1087

Rotational Spectrum of cis-HS3D M . LIEDTKE, A . H . SALECK, J. BEHREND, G . WINNEWISSER, R . KLÜNSCH, a n d J. HAHN 1091

XII Inhaltsverzeichnis

Note

On some Crystals of "Lapis Lazuli" A . BANERJEE a n d T. HÄGER 1094

Quadrupole Hyperfine Structure in the Rotational Spectra of Sulfur Dichloride I. MERKE a n d H . DREIZLER 1141

Errata

Topological Characteristics of Strictly Pericondensed Constant-Isomer Benzenoid Series, Z. Naturforsch 45 a, 1335 (1990). J. R . DIAS 1096

Lattice Vibration Spectra. LXXV. IR Single Crystal Reflection Spectra of Sr(C103)2

H . D . LUTZ a n d M . SCHMIDT 1145

Nuclear Quadrupole Coupling in the Rotational Spectrum of Thionyl Chloride I. MERKE a n d H . DREIZLER 1150

N u m b e r 11


Experimental Realization of Stokes Modes of the Pipe by Lorentz Excitation A . PYSIK a n d J. HEBER 1097

Nitrogen Nuclear Quadrupole Resonance Dips in the Proton Spin Relaxation Dispersion of Nematic and Smectic Thermotropic Liquid Crystals D . J . PUSIOL, R . HUMPFER, a n d F. NOACK 1105

Molecular Motion in Solid Tetrapropylammonium Bromide and Iodide S. LEWICKI, B. SZAFRANSKA, a n d Z . PAJ^K 1115

Bending Energy Minimisation Criterion for Molecu-lar Geometry in XY3 Pyramidal Systems K . INDIRA, M . K . R . WARIER, a n d T. R . ANANTHAKRISHNAN 1119

A Modification of the Free-Electron Model for Cyclic Polyenes G . TAUBMANN 1121

Differential Thermal Analysis and Dielectric Studies on Neopentanol under Pressure H . G . KREUL, R . WALDINGER, a n d A . WÜRFLINGER 1127

Quadrupole Hyperfine Structure in the Rotational Spectra of Sulfuryl Chloride I. MERKE a n d H . DREIZLER 1153

Interrelation Between Molecular Motions and Struc-ture in Solid Trimethylamine-boron-trichloride as Studied by N M R S. GLOWINKOWSKI, S. JURGA, a n d E . SZCZESNIAK 1157

A Technique to Classify the Similarity Solutions of Nonlinear Partial (Integro-)Differential Equations. I. Optimal Systems of Solvable Lie Subalgebras H . KÖTZ 1161

N u m b e r 12


Surrealistic Böhm Trajectories B . - G . ENGLERT, M . O . SCULLY, G . SÜSSMANN, a n d H . WALTHER 1175

Reconstructed Au (100) Surface Imaged with Scan-ning Tunneling Microscopy in Air T. SCHILLING, B. TESCHE, a n d G . LEHMPFUHL 1187

Dielectric Relaxation of Liquid Alicyclic Alcohols M . STOCKHAUSEN a n d S. v . HORNHARDT 1135

About the Radical Formation in the Pyrolysis of Formic Acid at High Temperatures M . KLATT, M . RÖHRIG, a n d H . G G . WAGNER 1138

Combination of EXAFS and Differential Anomalous X-ray Scattering for Studying Ni2Zr Amorphous Alloy Y u . A . BABANOV, A . F. SIDORENKO, V. R . SHVETSOV, M . BIONDUCCI, G . LICHERI, G . NAVARRA, A . L . AGEEV, a n d V. V. VASIN 1191

Inhaltsverzeichnis

FTIR Study of the v12 and the v12 + v 1 4 - v 1 4 Bands of 1,3,5-Triazine Near 740 c m - 1

W. BODENMÜLLER, A . RUOFF, a n d L . MANCERON 1197

Isomerization of Diphenyl Polyenes. Part III. Ab-sorption and Fluorescence Properties of 1,4-Diphe-nyl-l,3-butadiene in Polyvinyl alcohol) Film A . KAWSKI, B. KUKLINSKI, A . KUBICKI, a n d I . GRYCZYNSKI 1204

Debye-Waller Type Expression for the Nuclear Elastic Form Factors at Small Momentum Transfers M . E . GRYPEOS, G . A . LALAZISSIS, S. E . MASSEN, a n d C . P . PANOS 1211

Cosmological Implications of the Planck Aether Model for a Unified Field Theory F. WINTERBERG 1217

Rayleigh-Taylor Instability of a Partially Ionized Plasma in a Porous Medium in Presence of a Vari-able Magnetic Field R . C . SHARMA a n d SUNIL 1227

Further Study of Intersectorial Isotope Fractionation in Quartz A . KLEMM, A . BANERJEE, a n d S. HOERNES 1232

Surface Energy for Nematic Liquid Crystals: A New Point of View A . L . ALEXE-IONESCU, R . BARBERI, G . BARBERO, T. BEICA, a n d R . MOLDOVAN 1235

Dipole Moment and High Resolution Rotational Spectrum of Fluorocyanoacetylene, FCCCN M . KRÜGER, I . MERKE, a n d H . DREIZLER 1241

XIII

Photochemical Properties of 2-Aryl-3-Imino-l-In-dones I . TIMTCHEVA, N . GETOFF, P . NIKOLOV, a n d R . M . QUINT 1243

Structural Isomers of the Benzene Dimer from Mass Selective Hole-Burning Spectroscopy W. SCHERZER, O . KRÄTZSCHMAR, H . L . SELZLE, a n d E . W . SCHLAG 1248

Notes

The v4 Rotation Vibration Band of Dicyanoacetylene F. WINTHER, M . KETELSEN, M . NIEDENHOFF, a n d K . M . T. YAMADA 1253

Structural Parameters and Internal Rotational Barri-ers of tert-Butylammonium Ion: AMI and ab initio Calculations H . ISHIDA, Y. KUBOZONO, S. KASHINO, a n d R . IKEDA 1255

Luminescence Spectra of M n 2 + Doped in Lang-beinites T. BÖTTJER a n d M . STOCKHAUSEN 1257

Phase Transition in Cesium Enneabromodibis-muthate (III), Cs3Bi2Br9; an 8 1 Br and 209Bi NQR Study H . TERAO, H . ISHIHARA, T. OKUDA, K . YAMADA, a n d AL. WEISS 1259

Hydrogen in Electrodynamics. IX. The Equations of Second Order H . SALLHOFER 1262