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INORGANIC CHEMISTRY II

Course Introduction Inorganic Chemistry II Code #: ECS33601

Instructor: Prof. Kwangjin An (안광진) NSB 501-7 Tel: 052-217-2586 E-mail: kjan@unist.ac.kr Office hours: by appointment

Lecture: Tue, Thu 16:00 ~17:15 at EB1 E101

Homepage: anlab.unist.ac.kr (Download lecture notes through this website!)

Basic principles of inorganic chemistry needed for materials engineering and energy engineering

Topics covered will include:

electronic structure, spectroscopic and magnetic properties of coordination compounds crystal field theory and molecular orbital theory reaction and properties of coordination compounds

Inorganic Chemistry II

Textbook: Gary L. Miessler, Paul J. Fischer, & Donald. A. Tarr, Inorganic Chemistry, 5th Ed. Pearson

Reference book: Weller, Overton, Rourke, Armstrong, Inorganic Chemistry, 6th Ed. Oxford

Lecture Source: many parts are taken from Prof. Hoi Ri Moon’s

Inorganic Chemistry II

Inorganic Chemistry II Grading:

- Attendance and attitude 0% but potentially 100% When you are absent for 4 times, it will be given "F" grade!! I’ll call the roll randomly!! (I will not consider the e-attendance) - Midterm 40%

- Final 40% - Quiz or homework 10%

Note that all grades are final, and not open to negotiation

after they have been determined. No makeup exams will be given. Cheating will not be tolerated. Evidence of cheating on

an exam will result in a grade of zero for that exam, and further disciplinary action by the university.

Chapter subject week

Chap. 09 Coordination Chemistry I: Structures and Isomers 1 ~ 2

Chap. 10 Coordination Chemistry II: Bonding 3 ~ 5

Midterm Oct. 13 or 20

Chap. 11 Coordination Chemistry III: Electronic Spectra 7 ~ 8

Chap. 12 Coordination Chemistry IV: Reactions and Mechanisms 9 ~ 11

Chap. 13 Organometallic Reactions and Catalysis 12 ~ 13

Final Dec. 15

Inorganic Chemistry II

It can be changed depending on the situation.

Chapter 9. Coordination Chemistry I: Structures and Isomers

7

History Nomenclature Isomerism Coordination Numbers and Structures

Coordination Compounds

Pigment Dye

Prussian Blue

are composed of a metal atom or ion and one or more ligands (atom, ions, or molecules) that donate electrons to the metal)

Coordination Compounds: History Alfred Werner (1866-1919)

∙ Swiss chemist ∙ He won the Nobel Prize in Chemistry in 1913

for proposing the octahedral configuration of transition metal complexes

Chain Theory

Christian Wilhelm Blomstrand (1826-1897) And Sophus Mads Jørgensen (1837-1914)

VS

“Nitrogens form chains with those atoms having a valence of 5”.

[Co(NH3)6]Cl3

“All six ammonias bond directly to the cobalt”.

Werner vs. Blomstrand

∙ Number of ions by dissociation of chlorides ∙ Werner proposed an octahedral structure for compounds. ∙ Werner’s model was accepted in 1907 when he synthesized

the green trans and violet cis isomers of [Co(NH3)4Cl2]+.

Werner’s Compounds

Trans green

Cis violet

Werner’s Totally Inorganic Optically Active Compounds

[Co{Co(NH3)4(OH)2}3]Br6

∙ Werner discovered optically active and carbon-free coordination compounds.

∙ But it was be convinced until he syntheszied a racemic mixture of [Co{Co(NH3)4(OH)2}3]Br6.which formed into two optically active forms.

Werner’s Coordination Theory • Two kinds of bonding in compound

(1) Positive charge of the central metal ion --- balance negative ions (2) Ligands (neutral or charged) --- transition metal ion

[Co(NH3)4Cl2]Cl

complex ion or coordination sphere

∙ The coordination spheres acts as a unit ∙ The ions outside the blankets balance the charge and dissociate in solution. ∙ Depending on the metal and the ligands, the metal can have form one upto

at least 16 atoms attached to it. ∙ Werner developed his theories using compounds with 4 or 6 ligands.

counter ion

[Co(NH3)4Cl2]+ Possible structures with 6 ligands of

[Pt(NH3)2Cl2]2+ Possible structures with 4 ligands of

Chapter 9. Coordination Chemistry I: Structures and Isomers

History

Nomenclature Isomerism Coordination Numbers and Structures

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