SPIN-TRAPPING OF FLUOROALKYL RADICALS

被引：8

作者：

GILLE, L ^{[1
]}

STOESSER, R ^{[1
]}

机构：

[1] HUMBOLDT UNIV BERLIN,INST ANALYT CHEM,D-10115 BERLIN,GERMANY

来源：

JOURNAL OF FLUORINE CHEMISTRY | 1994年 / 69卷 / 02期

关键词：

SPIN TRAPPING; FLUOROALKYL RADICALS; ESR SPECTROSCOPY; GAMMA-IRRADIATION; ZINC REDUCTION; PHENYL-TERT-BUTYLNITRONE;

D O I：

10.1016/0022-1139(94)03118-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The formation of fluoroalkyl radicals in liquid chlorofluorocarbons (CF2Cl-CFCl2, CFCl3, CFCl2-CH3, CHF2-CF2-CF2Cl, CF3-CFH-CF3 and CCl4) has been investigated by means of the spin trapping technique and ESR spectroscopy. It is shown that the primary fluoroalkyl radicals which were generated in these compounds by ionising radiation are preferably formed by bond cleavage at carbon atoms attached to one fluorine atom. Besides the liberation of chlorine atoms in chlorine-containing compounds, in CHF2-CF2-CF2Cl and CF3-CFH-CF3 fluorine atoms were also detected. By comparison of radicals formed from gamma-irradiated CF2Cl-CFCl2 (CFC-113) and from CF2Cl-CFClI or CF2I-CFCl2 by zinc reduction, it was demonstrated that in CFC-113 both .CF2-CFCl,(2) and .CFCl-CF2Cl radicals are formed, whereas in iodine-containing homologues the formation of one species is favoured.

引用

页码：191 / 194

页数：4

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