Preparation, structures and some reactions of novel diynyl complexes of iron and ruthenium |
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Authors: | Bruce Michael I Ellis Benjamin G Gaudio Maryka Lapinte Claude Melino Giovanni Paul Frédéric Skelton Brian W Smith Mark E Toupet Loic White Allan H |
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Institution: | Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005. |
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Abstract: | Reactions between HC triple bond CC triple bond CSiMe3 and several ruthenium halide precursors have given the complexes Ru(C triple bond CC triple bond CSiMe3)(L2)Cp'Cp'= Cp, L = CO (1), PPh3 (2); Cp' = Cp*, L2= dppe (3)]. Proto-desilylation of 2 and 3 have given unsubstituted buta-1,3-diyn-1-yl complexes Ru(C triple bond CC triple bond CH)(L2)Cp'Cp'= Cp, L = PPh3 (5); Cp'= Cp*, L2 = dppe (6)]. Replacement of H in 5 or 6 with Au(PR3) groups was achieved in reactions with AuCl(PR3) in the presence of KN(SiMe3)2 to give Ru(C triple bond CC triple bond CAu(PR3)](L2)Cp'Cp' = Cp, L = PPh3, R = Ph (7); Cp' = Cp*, L2= dppe, R = Ph (8), tol (9)]. The asymmetrically end-capped Cp(Ph3P)2Ru]C triple bond CC triple bond CRu(dppe)Cp*] (10) was obtained from Ru(C triple bond CC triple bond CH)(dppe)Cp* and RuCl(PPh3)2Cp. Single-crystal X-ray structural determinations of and are reported, with a comparative determination of the structure of Fe(C triple bond CC triple bond CSiMe3)(dppe)Cp* (4), and those of a fifth polymorph of Ru(PPh3)2Cp]2(mu-C triple bond CC triple bond C) (12), and Ru(dppe)Cp]2(mu-C triple bond CC triple bond C) (13). |
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