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  4. Which of the following reactions would give trans-alkene?

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Q. Which of the following reactions would give trans-alkene?Chemistry Question Image

Hydrocarbons

Solution:

I. Meso compound (two same groups) $+$ Anti- elimination $\rightarrow$ trans - Alkene image
II. ( $\pm$ ) Compound (two same groups) + Anti - elimination
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III. ( $\pm$ ) Compound (two different groups) (but two eliminating groups in anti-position) $+$ Anti- elimination $\rightarrow $ trans - Alkene
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IV. ( $\pm$ ) Compound (two different groups) (but two eliminating groups is syn-position) $+$ anti- elimination
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