ELECTRON-SPIN-RESONANCE SPECTROSCOPY OF RADICAL CATIONS AND ANIONS OF METHYLATED BIPHENYLENES, TETRAPHENYLENE, AND OCTA-BETA-METHYLTETRAPHENYLENE

被引:11
作者
AVILA, DV [1 ]
DAVIES, AG [1 ]
GIRBAL, ML [1 ]
NG, KM [1 ]
机构
[1] UNIV LONDON UNIV COLL,DEPT CHEM,20 GORDON ST,LONDON WC1H 0AJ,ENGLAND
来源
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1990年 / 10期
关键词
D O I
10.1039/p29900001693
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Octa-β-methyltetraphenylene has been prepared in low yield by the thermolysis of tetra-β-methylbiphenylene. The radical cations and radical anions of tetra-α-methylbiphenylene, tetra-β-methylbiphenylene, and octamethylbiphenylene, and the radical cation of octa-β- methyltetraphenylene have been generated and their ESR spectra have been recorded and analysed. In trifluoroacetic acid containing mercury(II) trifluoroacetate, the tetra-α-methylbiphenylene radical cation undergoes mono- and dimercuriation. Tetra-β-methylbiphenylene in tetrahydrofuran in the presence of lithium apparently undergoes ring-opening to give a radical anion derived from 2,2′-dilithiobiphenyl. The structures which these spectra imply, particularly the apparent distortion which has been reported in the tetraphenylene radical anion, are discussed.
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页码:1693 / 1699
页数:7
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