homolysisn.
/həˈmɒlɪsɪs/ Chemistry.
The splitting of a molecule into two neutral atoms or radicals.
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homolysis1938
1938 C. K. Ingold in Trans. Faraday Soc. 34 227 I would suggest that we may as well have two [new words] and be done with it: viz., ‘heterolysis’ and ‘homolysis’, defined as follows: A:B→A + :B (Heterolysis) [and] A:B→A. + .B (Homolysis). Here the dots represent electrons.
1966 W. A. Pryor Free Radicals ix. 119 Molecule-induced homolysis is postulated to occur when radicals are formed at an anomalously rapid rate from the interaction of nonradical species.
Derivatives
homoˈlytic adj. of the nature of or involving homolysis.
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the world > matter > chemistry > chemical reactions or processes > [adjective] > of or relating to named chemical reactions or processes > of or relating to homolysis
homolytic1941
1941 Trans. Faraday Soc. 37 604 It is necessary to distinguish between two main types of bond-fission, viz., symmetric or homolytic fission and dissymmetric or heterolytic fission, defined as follows (the dots representing electrons): R./.X (homolytic fission) [and] R/..X (heterolytic fission).
1952 Sci. News 26 57 A covalent bond may..break by homolytic fission, each of the electrons separating with one of the atoms, giving two free atoms, e.g.: HCl→H + Cl.
homoˈlytically adv. by homolysis.
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the world > matter > chemistry > chemical reactions or processes > [adverb] > by means of named chemical reactions or processes > by means of homolysis
hydrolytically1928
homolytically1964
1964 N. G. Clark Mod. Org. Chem. xxv. 515 Heat and/or illumination first causes a molecule of chlorine to break homolytically into two chlorine atoms.
This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).
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n.1938