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pp Homoconjugation in organic radicals

✍ Scribed by M.C.R. Symons

Publisher: Elsevier Science
Year: 1973
Tongue: English
Weight: 134 KB
Volume: 19
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(73)87062-9

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✦ Synopsis

ESR data for various radicals of type RzCCRtX, when R is H or alky!, and X is either CI, Br or I, or PRt and AsR2, are discussed in terms ofp-p homoconjugation.

For the fi-halogen radicals, the nnalt,size of the an&tropic cotrplkg provides some evidence for this effect, but for the P-PR2 and /3-AsR2 radicals, the greatly enhanced isotropic coupling to "P or "As compared xvith those for the corresponding cation-radicals, R2eCRzPR: or K~&JR~AsR:, is taken as good evidence for homoconjugation Kawamura

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