Bond Lengths  [ENDORSED]

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Peter Nguyen 2I
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Joined: Fri Sep 28, 2018 12:29 am

Bond Lengths

Postby Peter Nguyen 2I » Sun Nov 04, 2018 12:36 am

Why do single bonds have longer bond lengths than double bonds?

505194972 3k
Posts: 27
Joined: Fri Sep 28, 2018 12:25 am

Re: Bond Lengths  [ENDORSED]

Postby 505194972 3k » Sun Nov 04, 2018 2:19 am

I believe the reason is because with two bonds mean a stronger hold between the two atoms so they are pulled closer together. while a single bond is held more loosely between the two atoms and would not be held as tightly making it longer. hopefully that helps.

Fayez Kanj
Posts: 62
Joined: Fri Sep 28, 2018 12:18 am
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Re: Bond Lengths

Postby Fayez Kanj » Wed Nov 07, 2018 11:38 am


Single bonds are weaker than double bonds (attraction between 2 electrons and the nucleus vs attraction of 4 electrons and the nucleus which is stronger). Since they are weaker, the electrons are less tightly pulled towards the atoms (they are further apart in space) and thus, have a longer length.

This is the trend:
stronger bond = shorter bond
weaker bond = longer bond
single bond - triple bond = weakest - strongest

Hope this helps :)

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