title: Iron complexes of (e)- and (z)-1,2-dichlorodisilenes.
abstract: Novel disilene-iron complexes [(E)- (1E) and (Z)-(eta2-R3SiClSi=SiClSiR3)Fe(CO)4 (1Z), SiR3 = tBu2MeSi] were synthesized by the reaction of the corresponding tetrachlorodisilane with an excess amount of K2Fe(CO)4, and the structures of 1E and 1Z were determined by X-ray crystallography. These complexes constitute not only the first transition-metal complexes with E,Z-isomerism but also the first complexes with halogen-substituted disilene ligands. The initial formation of 1Z during the synthetic reaction and the slow one-way isomerization of 1Z to 1E are rationalized by the intervention of the corresponding silylene complex (R3SiCl2Si)(R3Si)Si=Fe(CO)4.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, 980-8578 Sendai, Japan.
authors.forename: Hisako
authors.initials: H
authors.lastname: Hashimoto
authors.forename: Katsunori
authors.initials: K
authors.lastname: Suzuki
authors.forename: Wataru
authors.initials: W
authors.lastname: Setaka
authors.forename: Chizuko
authors.initials: C
authors.lastname: Kabuto
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Kira