Abstract

The potential in preparative chemistry of the precursors trans-[Ru(NH 3)(CCR 1)(Ph 2PCH 2CH 2PPh 2) 2]PF 6 ( 3) has been studied. They offer a convenient access, by NH 3 displacement, to new functional alkynyl-ruthenium derivatives. Complexes 3 react with alkynes HCCR 2 to give unsymmetrical trans-Ru(CCR 1)(CCR 2)(dppe) 2 compounds 4a-c, and with sodium methoxide in methanol they open the route to a variety of mixed hydride complexes 5a-c, trans-Ru(H)(CCR 1)(dppe) 2. In contrast, with carbon monoxide or isocyanides CNR 3 (R 3:CH 2Ph, C 6H 11, Me 3C) they allow the preparation of cationic derivatives trans-(Ru(CO)(CCR 1)(dppe) 2]PF 6 ( 6a-c) or trans-[Ru(CNR 3)(CCR 1)(dppe) 2]PF 6 ( 7a-d).

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