What is the number of carbon atoms present in | vedclass

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(B) For a hydrocarbon to exhibit cis-trans (geometrical) isomerism,there must be a restricted rotation around a double bond $(C=C)$.Each carbon atom o

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$4$

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(B) For a hydrocarbon to exhibit cis-trans (geometrical) isomerism,there must be a restricted rotation around a double bond $(C=C)$.Each carbon atom of the double bond must be attached to two different groups.The smallest acyclic alkene is but$-2-$ene $(CH_3-CH=CH-CH_3)$.In but$-2-$ene,each carbon of the double bond is attached to a hydrogen atom and a methyl group,which are different.Counting the carbon atoms in but$-2-$ene $(CH_3-CH=CH-CH_3)$,we find there are $4$ carbon atoms.Therefore,the smallest acyclic hydrocarbon exhibiting cis-trans isomerism has $4$ carbon atoms.

What is the number of carbon atoms present in the smallest acyclic hydrocarbon capable of exhibiting cis-trans isomerism?

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