Ti-Ru bimetallic complexes: catalysts for ring-closing metathesis

摘要

The reaction of the titanocene monophosphanes (1-4) with the dimer [(p-cymene)RuCl2](2) gives the heterobimetallic compounds (p-cymene)[(eta(5)-C5H5)(mu-eta(5):eta(1)-C5H4(CR2)(n)PR2')TiCl2]RuCl2 (5-8). The structure of 8, determined by X-ray diffraction, is reported here, A preliminary assessment of the performance of these complexes in ring-closing metathesis (RCM) revealed an excellent Ti-Ru-allenylidene pre-catalyst 12. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 24]