title: Preparation, structures and some reactions of novel diynyl complexes of iron and ruthenium.
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 C[Ru(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).
authors.affiliation: Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005.
authors.forename: Michael I
authors.initials: MI
authors.lastname: Bruce
authors.forename: Benjamin G
authors.initials: BG
authors.lastname: Ellis
authors.forename: Maryka
authors.initials: M
authors.lastname: Gaudio
authors.forename: Claude
authors.initials: C
authors.lastname: Lapinte
authors.forename: Giovanni
authors.initials: G
authors.lastname: Melino
authors.forename: Frédéric
authors.initials: F
authors.lastname: Paul
authors.forename: Brian W
authors.initials: BW
authors.lastname: Skelton
authors.forename: Mark E
authors.initials: ME
authors.lastname: Smith
authors.forename: Loic
authors.initials: L
authors.lastname: Toupet
authors.forename: Allan H
authors.initials: AH
authors.lastname: White