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why bond length of double bond is less than that of triple bond ? I came across this question many a times. I am confused because there is a sigma bond and two phi bond in triple bond and a sigma and phi bond in double bond. Hence bond length of both of them should be same. But it is not so. Ex :- Carbon Carbon triple bond length is shorter than C=C

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closed as unclear what you're asking by paracetamol, M.A.R., Jon Custer, DSVA, Todd Minehardt Jul 22 '17 at 22:03

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Before you ask "why", ask "if". $\endgroup$ – Ivan Neretin Jul 22 '17 at 6:30
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    $\begingroup$ perhaps you can give some examples to support your question? $\endgroup$ – porphyrin Jul 22 '17 at 6:47
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    $\begingroup$ Pretty sure phi bonds don't figure in $C-C$ or $C=C$ bonds... $\endgroup$ – paracetamol Jul 22 '17 at 7:41
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    $\begingroup$ You need to make up your mind whether $\ce{C#C}$ or $\ce{C=C}$ bonds are shorter. $\endgroup$ – orthocresol Jul 22 '17 at 9:02
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%s character of sp hybridised orbital is 50% and of sp2 it's 33%. More S-character means that the shared electron pair is closer to the carbon nucleus making it stronger and shorter.

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