Double and triple bonds

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Maricruz Diagut 3J
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Double and triple bonds

Postby Maricruz Diagut 3J » Thu Oct 29, 2015 2:27 am

I am under the impression that only Carbon and Nitrogen can form double bonds, is this right? Also what elements can form triple bonds?

Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: Double and triple bonds

Postby KaylaH » Thu Oct 29, 2015 11:12 am

It's not true that only carbon and nitrogen can form double or triple bonds. It really depends on the molecule and finding the most stable lewis structure for that molecule at hand. You have to take formal charge into consideration in order to find the most stable structure.

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Re: Double and triple bonds

Postby tianying_feng_3J » Thu Oct 29, 2015 11:22 am

This impression is not necessarily true.
1. There are normally 4 e- regions (either bonds or lone pairs) around the C or N. You may have heard that "carbon has to have 4 bonds." And C and N can form double bond(s) with another C or N or other atoms in certain molecules
But other atoms can also form double bond(s), such as the carbon-oxygen double bond in acetone, the sulfur-oxygen double bond in dimethyl sulfoxide, etc.
2. Example of molecules that have triple bond(s): C to C (H−C≡C−H) or C to N (N≡C−C≡N), or C to O (C≡O)

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