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Lab 9: Qualitative Identification of Organic Compounds – Preparation of Derivatives

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%ate &all ('Olivia &arris$

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Purpose: To figure out what two unknown compounds are using classical chemical methods,like functional group identification and derivative preparation. The derivative tests will confirm

the final identity of the unknowns from the blue notebook and melting point results.

Procedure:

Solid Unknown

1. Put 10 mg of the unknown in a conical vial.. !dd two drops of methanol and drops of water.". Under the hood, add " drops of the brominating agent.#. $eep adding the agent until the reddish%brown color persists&. !dd # drops of water, cap the vial, shake, vent, and let it stand for 10 minutes

'. (et the crystals with vacuum filtration in a )irsch funnel.*. +ash the filter cake with 0.& m of &- aueous sodium bisulfate/. ecrystallie the solid, derivative from ethanol, and dissolve in ethanol and water until it

becomes cloudy.2. 3ool in an ice bath and collect the crystals10. 4ry and collect the melting point

iuid Unknown

5the process for ketone derivative collection isn6t in the book, so 76ll ask the T.!. about it at the

lab5

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Data:

Solid Unknown5 iuid Unknown 4eriv.

8elting Points '#./%'2.0 #.#%#&

5The derivative results were not sufficient to provide data, difficulties described in conclusion

Possible 3ompounds 9in order of likelihood:

iuid Unknown 4erivative mp 9;3: