Everything about Electron Deficiency totally explained
Electron deficiency occurs when a compound has too few
valence electrons for the connections between atoms to be described as
covalent bonds. Electron deficient bonds are often better described as
3-center-2-electron bonds. Examples of compounds that are electron deficient are the
boranes.
The term
electron-deficient is also used in a more general way in
organic chemistry, to indicate a
pi-system such as an
alkene or
arene that has
electron-withdrawing groups attached, as found in
nitrobenzene or
acrylonitrile. Instead of showing the nucleophilic character common with simple C=C bonds, electron-deficient pi-systems may be
electrophilic and susceptible to nucleophilic attack, as is seen in the
Michael addition or in
nucleophilic aromatic substitution.
Further Information
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