The reaction of xenon difluoride with chloroform

被引：5
|
作者：
Shaw, MM [1 ]
Smith, RG [1 ]
Ramsden, CA [1 ]
机构：
[1] Univ Keele, Sch Chem & Phys, Lennard Jones Labs, Keele ST5 5BG, Staffs, England
来源：
JOURNAL OF FLUORINE CHEMISTRY | 2002年 / 116卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
xenon difluoride; chloroform; three-centre; two-electron bond; electrophilic substitution; hypervalent;
D O I：
10.1016/S0022-1139(02)00100-8
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The reaction of xenon difluoride with chloroform in PTFE-FEP, Pyrex and quartz tubes has been studied using F-19 and C-13 NMR spectroscopy. The detection of CCl4 as a transient product suggests a mechanism that can lead to trichloromethyl radicals. A mechanism postulating formation of the hypervalent intermediate Cl3C-Xe-F is proposed. In PTFE-FEP, the initiation of reaction is slow but in Pyrex reaction begins immediately due to Lewis acid sites on the glass surface. In Pyrex and quartz, an alternative decomposition of XeF2 at the glass surface competes and limits the lifetime of the reagent under these conditions. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：71 / 73
页数：3
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