Electrochemical and NMR spectroscopic studies of selenium- and tellurium-substituted ferrocenes I:: ferrocenyl alkyl chalcogenides [Fe(η-C5H5)(η-C5H4ER)]

被引:18
作者
Burgess, MR [1 ]
Morley, CP [1 ]
机构
[1] Univ Wales, Dept Chem, Swansea SA2 8PP, W Glam, Wales
关键词
ferrocene; selenium; tellurium; voltammetry; NMR spectroscopy;
D O I
10.1016/S0022-328X(00)00738-5
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A series of 22 ferrocenyl alkyl selenides and tellurides has been prepared from the diferrocenyl dichalcogenides. The compounds have been characterised by mass spectrometry, multinuclear NMR spectroscopy, cyclic and differential pulse voltammetry. There is a close correlation between the Se-77 and Te-125 chemical shifts of analogous compounds, with delta(Te-125)/delta(Se-77)= 1.60. Other trends in the NMR data are also apparent. All the compounds studied undergo a one electron reversible oxidation at slightly more positive potentials than ferrocene itself. In addition, the tellurides exhibit a second quasi-reversible process at higher potentials, which appears to be chalcogen-based. There is no obvious correlation between the electrochemical results and the NMR spectroscopic data. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码:101 / 108
页数:8
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