Mono-and bunuclear molybdenum complexes incorporating 4-(4-hydroxyphenyl) pyridine: metal-metal interactions across an asymmetric bridging ligand

Das, Amitava ; Jeffery, John C. ; Maher, John P. ; McCleverty, Jon A. ; Schatz, Erik ; Ward, Michael D. ; Wollermann, Gerd (1992) Mono-and bunuclear molybdenum complexes incorporating 4-(4-hydroxyphenyl) pyridine: metal-metal interactions across an asymmetric bridging ligand Angewandte Chemie International Edition in English, 31 (11). pp. 1515-1518. ISSN 0570-0833

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/anie.19...

Related URL: http://dx.doi.org/10.1002/anie.199215151

Abstract

Localization versus delocalization: in the binuclear asymmetric Mo complex 1, a facile one-electron reduction with cobaltocene is sufficient to convert a system with localized electrons to one with delocalized electrons. Whereas according to the EPR spectrum the unpaired electron in the 17e-16e complex 1 is localized at the Mo center coordinated to N, in the 17e-17e diradical 1- a rapid site exchange of the two unpaired electrons occurs for which a rate of 4 × 107 Hz was determined. L* = hydro-tris(3,5-dimethylpyrazolyl)borate.

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