Question

7. Circle and name all the functional groups in these structures 8. Calculate degrees of unsaturation (DoU or HDI) for the following, and propose a structure for each A C6H1004 B C6H1SN 9. Which of the following structures does not represent the same compound as the other four. ه ا " الله لا 10. Ephedrine is chiral compound isolated from the plant ephedra sinica and has the following molecular structure. OH NHCHE Choose the incorrect statement about ephedrine. (A) The mirror image structure of ephedrine is its enantiomer. (B) The ephedrine shown above has two diastereomers. (C) Ephedrine and all of its diastereomers must have the same melting point (D) Ephedrine and its enantiomer have the same melting point. (E) Ephedrine and enantiomer are stereoisomers.

Answer 1

Carboxylic acid MO ОН group 7 pengan Ester group COH) Phenolic (OH) Amide group. lyclic ethar.

DOU evaluate + +1, HoO4 Formula to DOO = C-H Dow. 6-10 +1 2 6 -5 +1. Dow: 2 2. нин Н 1 1 1 64 -o- proposed I wУНООС – С – С – С – С – соон structure) Hooc- н н н н - GHIGN Dow: - 5 + + + 26- 5 +0.5 +1. Dov. 20 Prepose eu, - сну - сну - ана -ен, – – анз Structure

9. Structure of B does not represent the some compound as the other forur. This is because the only B shows S'configuration at the chiral center. Whereas other compounds shows R. the same 10 Diastereomers do not have meting point (in this case). Answer is a C.