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Organic chemistry practical report 2 Identification of an unknown ketone
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Short report of experiment 2: Identification of an unknown ketoneName : Tymo Zwakenberg
S-number : 4326253
TA : Ali & Isabella
Date : 16-05-2023
Figure 1: Reaction mechanism of the conversion of the unknown carbonyl compound & methyl
hydrazinocarboxylate (represented by the Amine with-R) [1 &3].
Table 1: Overview of the used compounds during the experiment [4].
Compound g/mol g or mL mmol eq
Acetophenone 120.15 1 ml 8.57 1
Salicylaldehyde 122.12 1 ml 9.38
Cinnamaldehyde 132.16 1 ml 7.94
Methyl hydrazinocarboxylate 90.08 1.2 g 13.32 1.54
Ethanol 46.07 5 ml 85.66 0.1M
Water 18.02 5 ml 277.47 0.031M
Acetic acid 60.05 1 ml 17.47
1.19g of methyl hydrazinocarboxylate was weighed of.
Introduction
The goal of the experiment was to get acquainted with recrystallization & TLC as methods to
identify an unknown carbonyl compound. The carbonyl compound would react with methyl
hydrazinocarboxylate into the corresponding carboxymethoxyhydrazone. Rf values and
melting points were given about these carbomethoxy hydrazones and will subsequently aid in
the determination of the unknown compound. Unknown A was chosen in this experiment to
be identified.
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