Give the product of the bimolecular elimination from each of the isomeric halogenated compounds.

Question

1)

KOtBu

1-bromo-2-methyl-1,2-diphenylethane --------->

1. Br is dashed & CH3 is wedged

2)

KOtBu

1-bromo-2-methyl-1,2-diphenylethane ---------->

1. Br is dashed & CH3 is dashed

Answer 1

BY THE WAY YOU MEAN 1-BROMO-1,2-DIPHENYLPROPANE .. but I'll use your funky nomenclature

in some parts below except the correct answers.. but you just want to know TRANS V CIS OBVIOUSLY

(1) Are you referring to a staggered drawing with the dashes and wedges ?==> It matters... I'll assume it's drawn staggered,,,

You will get the (z)1,2-diphenylpropene--- I'm seeing (R,R) 1-bromo-2-methyl-1,2-diphenylethane....

CIS

(2) This will be the opposite of the above, as it has changed one stereocenter but not both... the (s,s) would have given the same (cis/trans) isomer as the r,r ... but this will give (E)1,2-diphenylpropene

TRANS