ipso-attack definition

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ipso-attack definition

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The attachment of an entering group to a position in an aromatic compound already carrying a substituent group (other than hydrogen). The entering group may displace that substituent group but may also itself be expelled or migrate to a different position in a subsequent step. The term "ipso-substitution" is not used, since it is synonymous with substitution.

For example:

where E+ is an electrophile and Z is a substituent (other than hydrogen). See also cine-substitution, tele-substitution.

ipso-attack definition

See also: