A directly ring-to-ring linked ferrocene-pseudotitanocene complex

Addition of excess ferrocenylacetylene (FcC=CH) to [eta(5)-(C5H5)Ti][mu:eta (2):eta(2)-C-2(SiMe3)(2)](2)[eta(5)-(C5H5)Mg] (1) affords the novel ferroce ne - pseudotitanocene complex [eta(5)-1,2,5,6-tetrakis(trimethylsilyl)-4-fe rrocenylcyclohexa-1,4-dienyl](eta(5)-cyclopentadienyl)titanium(II), [eta(5) -(Me3Si)(4)FcC(6)H(2)]Ti(eta(5)-C5H5) (2), as the sole isolated titanium-co ntaining product. Its structure was established by EI MS, NMR and UV-vis sp ectroscopy. The formation of 2 follows the general reaction route of termin al acetylenes with 1. (C) 1999 Elsevier Science S.A. All rights reserved.