Number of structural isomeric alkenes (molecu | vedclass

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Question

(B) The molecular formula $C_6H_{12}$ corresponds to an alkene with one double bond. For an alkene to yield $n$-hexane $(CH_3-CH_2-CH_2-CH_2-CH_2-CH_3

Vedclass · Accepted Answer

$3$

Vedclass · Answer

(B) The molecular formula $C_6H_{12}$ corresponds to an alkene with one double bond. For an alkene to yield $n$-hexane $(CH_3-CH_2-CH_2-CH_2-CH_2-CH_3)$ upon hydrogenation,the carbon skeleton must be a straight chain of $6$ carbons.Possible structural isomers of hexene with a straight chain are:$1$. $Hex-1-ene$ $(CH_2=CH-CH_2-CH_2-CH_2-CH_3)$$2$. $Hex-2-ene$ $(CH_3-CH=CH-CH_2-CH_2-CH_3)$$3$. $Hex-3-ene$ $(CH_3-CH_2-CH=CH-CH_2-CH_3)$All these three structural isomers have a straight chain of $6$ carbon atoms and will produce $n$-hexane upon hydrogenation.Therefore,the total number of such structural isomers is $3$.

Number of structural isomeric alkenes (molecular formula $= C_6H_{12}$) which all give $n$-hexane on hydrogenation in the presence of a metal catalyst.

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