ESR spectra fo matrix-isolated bromobenzene cations formed by radiolysis
✍ Scribed by Martyn C.R. Symons; Akinori Hasegawa; Paul Maj
- Book ID
- 103021094
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 304 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
C\posure of d~lutc solutrons of bromobenzcne and pdibromobcnzrne III lluorotrlchloromcthane to 6oCo y-rays at 77 I: g.~e the corrcspondmg cations clanclcrlzed by ESR ~pectrs Csllmak!d spin dcrwics on brommc of ~30% and 235, respccnvcly, arc gcatcr than those prcdlctcd by comparison with neutral o-bromo radlcalr, RzCBr (==lSG). Evldcncc for drmcr cajun iormation m more conccnuarcd soluuons is pressnrcd 1. lntroduclion Some time ago. we showed that powder ESR spcc-tr3 characteristic of cr.halo rachcals (Cl, Br or 1) could be obtamed in solid-state radlolysis [l-3]. These spectra gave well-defined ieeatures for tile maximum hyperfine mteractlon (xx) but it proved difficult to deduce the vv and zz features in the absence of fur-*_ ther Informanon. Subsequent single-crystal studies, particularly by Hiittermann and co-workers, have