# Ylide

A ylide is a neutral species in which there is a carbon atom bearing a formal charge of -1 bound to a heteroatom bearing a formal charge of +1.  Ylides are classified based on the nature of the positively charged heteroatom.

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Some ylides are resonance stabilized due to pπ-dπ interactions.

eg:

Some are by delocalization of the lone pair on the negatively charged carbon atom to a pi bond.

eg:

Some are by both.

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Others are not resonance stabilized.

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