Bond Lengths  [ENDORSED]

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Bond Lengths

Postby alyssawhite1L » Mon Nov 13, 2017 9:34 am

There was a question that asked us to compare the bond lengths of different molecules. In part a it had us compare a single to double to triple bond. However, in part b, it had us compare a molecule that had 1 single bond and one double bond, and a molecule that had 2 single bonds and one double bond. The answers said they have nearly the same bond length and i was wondering why this is? Wouldnt the one with 2 single bonds have longer bond length?

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Re: Bond Lengths  [ENDORSED]

Postby Cooper1C » Mon Nov 13, 2017 10:11 am

This could be because of resonance. The molecule is an average of the resonance structures, so the bond length is an average as well.

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Re: Bond Lengths

Postby donnanguyen1d » Mon Nov 13, 2017 4:13 pm

I think that the sum of two single bonds is stronger than a double bond; therefore, it is probably shorter or about the same length.

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Re: Bond Lengths

Postby Evelyn L 1H » Mon Nov 13, 2017 7:32 pm

single bonds are the weakest and longest, double bonds are stronger and shorter than single bonds, and triple bonds are the strongest and the shortest

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