Difference between revisions of "Homolysis"

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Fragmentation of an [[odd electron ion]] that results from one of a pair of electrons that form a bond between two atoms moving to form a pair with the odd electron on the atom at the apparent charge site. Fragmentation results in the formation of an [[even electron ion]] and a radical. This reaction involves the movement of a single electron and is symbolized by a single-barbed arrow. Synonymous with [[Homolysis]].
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'''homolysis (homolytic)'''
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The cleavage of a bond ('homolytic cleavage' or 'homolytic fission') so that each of the molecular fragments between which the bond is broken retains one of the bonding electrons. A unimolecular reaction involving homolysis of a bond (not forming part of a cyclic structure) in a molecular entity containing an even number of (paired) electrons results in the formation of two radicals:
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It is the reverse of colligation. Homolysis is also commonly a feature of bimolecular substitution reactions (and of other reactions) involving radicals and molecules.
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See also: bond-dissociation energy, heterolysis
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Source: PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1122
 
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== Related Terms ==
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== See also ==
 
 
 
*[[Heterolytic Cleavage]]
 
*[[Heterolytic Cleavage]]
  
 
[[Category:Reactions]]
 
[[Category:Reactions]]
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{{DEFAULTSORT:Homolytic Cleavage}}

Latest revision as of 21:20, 15 June 2013

Gold Book

GOLD BOOK DEFINITION

IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997).

Homolysis

homolysis (homolytic)

The cleavage of a bond ('homolytic cleavage' or 'homolytic fission') so that each of the molecular fragments between which the bond is broken retains one of the bonding electrons. A unimolecular reaction involving homolysis of a bond (not forming part of a cyclic structure) in a molecular entity containing an even number of (paired) electrons results in the formation of two radicals:

It is the reverse of colligation. Homolysis is also commonly a feature of bimolecular substitution reactions (and of other reactions) involving radicals and molecules.

See also: bond-dissociation energy, heterolysis

Source: PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1122

IUPAC Gold Book
Index of Gold Book Terms


See also