Question

Why Carbon makes double triple bond if one bond is sufficient? If one bond not sufficient why not? ​

Answer 1

because the H atoms are small and can get close to one another. The C=C double bond is not quite twice as strong as a single bond because the second shared electron pair does not have as favorable geometry for bonding as does the first pair.

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Answer 2

Answer:

A carbon-carbon triple bond may be located at any unbranched site within a carbon chain or at the end of a chain, in which case it is called terminal. Because of its linear configuration ( the bond angle of a sp-hybridized carbon is 180º ), a ten-membered carbon ring is the smallest that can accommodate this function without excessive strain. Since the most common chemical transformation of a carbon-carbon double bond is an addition reaction, we might expect the same to be true for carbon-carbon triple bonds. Indeed, most of the alkene addition reactions discussed earlier also take place with alkynes, and with similar regio- and stereoselectivity.

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