Question

Which of the following compounds have Z-configuration?

(a) CH3^CH3CH2>C=C<^HCH3

(b) H^Ph>C=C<^COOHPh

(c) H2N^Cl>C=C<^COOHBr

(d) CH3^Ph>C=C<^CH2CH3Br

I have been asked this question during an interview for a job.

The origin of the question is E and Z Nomenclature of Geometric Isomers in portion Structure and Stereostructure of Molecules of Engineering Chemistry I

Answer 1

The correct option is (b) H^Ph>C=C<^COOHPh

Explanation: All the other options are in E-configuration. Only the second option shows the Z-configuration.