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Posted: Sun Nov 03, 2019 10:33 am
When drawing Lewis Structures, how do we know when to use a double bond or triple bond vs just a single bond?
Posted: Sun Nov 03, 2019 10:43 am
Drawing lewis structures is really just trial and error. If you draw a full lewis structure and realize you have too many electrons surrounding the elements, then a double bond has to be used. If you still have too many electrons after you have done a double bond, then a triple bond needs to be used.
Posted: Sun Nov 03, 2019 12:08 pm
Also, when you're deciding whether to use single, double, or triple bonds, make sure that the elements in the first or second period are observing the octet rule!
Posted: Sun Nov 03, 2019 12:17 pm
Also, often you will be shifting around with the different types of bonds when drawing the various resonance structures for a compound. This usually entails removing double or triple bonds and turning them into single bonds and adding formal charges.
Posted: Sun Nov 03, 2019 1:10 pm
The type of bond depends on the formal charge of each of the elements in the compound. The goal is to get the least magnitude of formal charges.