title: Elimination of HX (X = Cl, Br) from haloalkenes on the Ru2Q2 (Q = S, Se) core complex.
abstract: Treatment of [[Ru(P(OCH3)3)2(CH3CN)3]2(mu-Q2)](CF3SO3)4 (1, Q = S; 2, Q = Se) with haloalkenes resulted in the formation of complexes carrying unsaturated C3Q2 five-membered or C4Q2 six-membered rings via elimination of HX (X = Cl, Br). The reactions of 1 and 2 with allyl bromide gave the corresponding addition products, [[Ru(P(OCH3)3)2(CH3CN)3]2(mu-QCH=CHCH2Q)](CF3SO3)4 (3, Q = S; 4, Q = Se), via elimination of HBr. The elimination process seems to be thermodynamically controlled and takes place at the final stage of the reaction. The steric effect of the halogen atoms seems more operative than the electronic one.
authors.affiliation: Department of Chemistry, School of Science and Engineering, and Advanced Research Institute of Science and Engineering, Waseda University, and Japan Science and Technology Corporation, 3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555, Japan.
authors.forename: Shiho
authors.initials: S
authors.lastname: Hatemata
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Sugiyama
authors.forename: Saori
authors.initials: S
authors.lastname: Sasaki
authors.forename: Kazuko
authors.initials: K
authors.lastname: Matsumoto