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COLLOQUIUM Nel I. Define in the structure of alanine (2-aminopropanoic acid) a. the hybridization type of carbon atoms and hetero b. the type of conjugation and show the electronic structure of the conjugated systems by atoms (pyridine and pyrrole type) overlapping of non hybrid p-orbitals. Designate electrons movement with curved arrowS 2. Write two chair conformations for trans-cyclohexanediol-1,3. Indicate the most stable 3. Classification of organic reactions according to the result and the mechanism. The types of 4. Compare reactivity of ethanoic acid and ethanoic anhydride in acylation reactions. Write the conformation. reagents. The types of bond cleavage in organic compounds. Examples scheme and outline mechanism of esterification reaction for the most active compound. Name the product of reaction. 5. Write the schemes of reactions, represent and name reaction centers, taking part in each reaction, indicate the mechanism of the following reactions: + Br2 FeCl3 + HCN + CH3COCI + NaOH acetoacetic ester

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Answer #1

a)

ALANI NE NH 2

Hybridisation of the carbon atoms are

(a) sp2, (b) sp3 ,  (c) sp3

Hybridisation of nitrogen atom is sp3

b) Conjugation present in the molecule is resonance within the carboxylic group.

ㄧ田 2. N H 2

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