Question

100. Stereoisomers can exist in the case of which of the following? A) The hydrazone of butanone B) The oxime of acetone C) The phenylhydrazone of cyclohexanone The cyclic acetal formed from propanal and ethane-1,2-diol E) The imine of cyclopentanone o@

Answer 1

Stereoisomers can exist in the case of option-A.

Stereoisomers are the compounds which have same molecular formula but three-dimensional (3D) orientations of their atoms in space are different from each other. i !00) A). The hydrazone of butanone of . Creta criz the heller arb e tt : alb ette = 0 + NH₃NH2 HH There are two diastereomers. In A = NHg and-cle groups are on same side of the @=N whereas in ®, they are on opposite side. of the can resulting & ® as two geometrical Isomers i.e diastereomes. B.) The oxime of acetone.cth cock + NH₂ OH VezNH tercityNo stereoisomers. E l two similar -chiz groups attached O OH to carbon. Interchange of the Lop . &- OH groups gives identical structure c) The Phenylhydrazone of cyclohexanone. N N -nhph ... NH Phryno . No stereoisomers. Interchanging the position of Lipt -NHPh gives identical structure. Lopalone pair electrons

D) The eydie acetal formed from propanal and ethane 1,2 dioli. CH CH₂ Cho t. for → kthehet TO No stereo isomer. e as no chiral centre is present. E) The imine of eyclopentanone To why →TENH .... change. : . No stereoisomers, interchanging the position of L.p.& Hi orfanatom gines identical structure: