Question

Which of the following reactions would give trans-alkene?

• A. (I)
• B. (II)
• C. (I), (III)
• D. (II), (IV)

Answer 1

Answer: (C)

I. Meso compound (two same groups) $+$ Anti- elimination $\to$ trans - Alkene
II. ( $\pm$ ) Compound (two same groups) + Anti - elimination

III. ( $\pm$ ) Compound (two different groups) (but two eliminating groups in anti-position) $+$ Anti- elimination $\to$ trans - Alkene

IV. ( $\pm$ ) Compound (two different groups) (but two eliminating groups is syn-position) $+$ anti- elimination