What does neighbouring group participation mean?
Definitions for neighbouring group participation
neigh·bour·ing group par·tic·i·pa·tion
This dictionary definitions page includes all the possible meanings, example usage and translations of the word neighbouring group participation.
Wiktionary
neighbouring group participationnoun
Any of many effects in organic chemistry in which the course of a reaction, or its rate, is affected by the presence of a neighbouring functional group; anchimeric assistance
Wikipedia
Neighbouring group participation
In organic chemistry, neighbouring group participation (NGP, also known as anchimeric assistance) has been defined by the International Union of Pure and Applied Chemistry (IUPAC) as the interaction of a reaction centre with a lone pair of electrons in an atom or the electrons present in a pi bond contained within the parent molecule but not conjugated with the reaction centre.[1] When NGP is in operation it is normal for the reaction rate to be increased. It is also possible for the stereochemistry of the reaction to be abnormal (or unexpected) when compared with a normal reaction. While it is possible for neighbouring groups to influence many reactions in organic chemistry (e.g. the reaction of a diene such as 1,3-cyclohexadiene with maleic anhydride normally gives the endo isomer because of a secondary effect {overlap of the carbonyl group π orbitals with the transition state in the Diels-Alder reaction}) this page is limited to neighbouring group effects seen with carbocations and SN2 reactions.
Wikidata
Neighbouring group participation
Neighbouring group participation or Anchimeric assistance in organic chemistry has been defined by IUPAC as the interaction of a reaction centre with a lone pair of electrons in an atom or the electrons present in a sigma bond or pi bond. When NGP is in operation it is normal for the reaction rate to be increased. It is also possible for the stereochemistry of the reaction to be abnormal when compared with a normal reaction. While it is possible for neighbouring groups to influence many reactions in organic chemistry this page is limited to neighbouring group effects seen with carbocations and SN2 reactions.
Numerology
Chaldean Numerology
The numerical value of neighbouring group participation in Chaldean Numerology is: 9
Pythagorean Numerology
The numerical value of neighbouring group participation in Pythagorean Numerology is: 6
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"neighbouring group participation." Definitions.net. STANDS4 LLC, 2024. Web. 28 Apr. 2024. <https://www.definitions.net/definition/neighbouring+group+participation>.
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