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Tetramethylcyclopentadienylselenium derivatives
Authors:Ford Susan  Hofmann Marco  Morley Christopher P  Roberts John L  Di Vaira Massimo
Institution:Department of Chemistry, University of Wales Swansea, Singleton Park, Swansea, SA2 8PP, UK.
Abstract:Bis(1,2,3,4-tetramethylcyclopentadienyl)selane (1) has been prepared by the reaction of tetramethylcyclopentadienyllithium (Cp(t)Li) with selenium bis(diethyldithiocarbamate). Treatment of Cp(t)Li with elemental selenium, followed by air oxidation, led to loss of the allylic hydrogen atom, and formation of the novel tricyclic compound 1,4,5,6,7,10,11,12-octamethyltricyclo7.3.0.0]-2,8-diselenadodeca-3,5,9,11-tetraene (2). The sulfur analogue of 2 has been obtained by a similar procedure. The X-ray crystal structures of compounds 1 and 2 have been determined, and the molecular geometry observed for has been probed using DFT calculations.
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