In which of the following compounds is the bo | vedclass

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(D) The bond length between two carbon atoms depends on the hybridization of the carbon atoms involved. The bond length decreases as the $s$-character

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Propyne

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(D) The bond length between two carbon atoms depends on the hybridization of the carbon atoms involved. The bond length decreases as the $s$-character in the hybrid orbitals increases. $1$. In $CH_3-CH_2-CH_3$ (Propane),the bond is between $sp^3-sp^3$ carbons. $2$. In $CH_3-CH=CH_2$ (Propene),the bond is between $sp^3-sp^2$ carbons. $3$. In $CH_3-C\equiv CH$ (Propyne),the bond is between $sp^3-sp$ carbons. Since the $sp$ hybridized carbon has $50\% \ s$-character,it is more electronegative and holds the bonding electrons closer to the nucleus,resulting in the shortest bond length compared to $sp^2$ or $sp^3$ hybridized carbons. Therefore,the $sp^3-sp$ bond in Propyne is the shortest.

In which of the following compounds is the bond length between an $sp^3$ hybridized carbon and an adjacent carbon atom the shortest?

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