ELECTRON-PARAMAGNETIC-RESONANCE SPECTRA OF R-C-60 RADICALS .2. HINDERED ROTATION IN ALKYL-C-60 AND SILYL-C-60 RADICALS

被引：28

作者：

KEIZER, PN ^{[1
]}

MORTON, JR ^{[1
]}

PRESTON, KF ^{[1
]}

KRUSIC, PJ ^{[1
]}

机构：

[1] DUPONT CO INC,CENT RES & DEV,WILMINGTON,DE 19880

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1993年 / 06期

关键词：

D O I：

10.1039/p29930001041

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Photolytically generated alkyl (R) and silyl (SiR3) radicals react with C60 forming adducts readily identifiable by EPR spectroscopy. The temperature dependence of the spectra of R-C60 radicals indicates a barrier to rotation about the R-C60 bond (DELTAH) which varies from ca. 3 kcal mol-1 for CH3-C60 to ca. 7 kcal mol-1 for tert-butyl-C60. Silyl-C60 radicals, on the other hand, are freely rotating about the Si-C60 bond although the Si-R' bonds are non-rotating on the EPR timescale.

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页码：1041 / 1045

页数：5

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