Q29 / 160 · AP EAMCET 2008 · Chemistry
Which of the following compound(s) has ' $Z$ ' configuration?
- A(i) only
- B(ii) only
- C(iii) only
- Correct answerD(i) and (iii)
Solution
When the groups with higher priority (ie, with high atomic number) are present on same side of double bond, then the configuration is $Z$ but when present on opposite side of double bond, the configuration is $E$.
(Priority : $\mathrm{Br}>\mathrm{Cl}$ and $\mathrm{CH}_3>\mathrm{H}$ ) Hence, compound (i) and (iii) have $(Z)$ configuration.
(Priority : $\mathrm{Br}>\mathrm{Cl}$ and $\mathrm{CH}_3>\mathrm{H}$ ) Hence, compound (i) and (iii) have $(Z)$ configuration.
Hence, the correct answer is option: 'D'.