title: Ligand dependence of pi-complex character in disilene-palladium complexes.
abstract: The synthesis and structures of new 16-electron disilene palladium complexes with 2,6-dimethylphenyl isocyanide and phenyldimethylphosphine ligands [L(1)L(2)Pd{(t-BuMe(2)Si)(2)Si=Si(SiMe(2)Bu-t)(2)}, where L(1) = L(2) = PhMe(2)P; L(1) = (cyclohexyl)(3)P, L(2) = 2,6-dimethylphenyl isocyanide; L(1) = L(2) = 2,6-dimethylphenyl isocyanide] are described. Comparison of the X-ray structural parameters around the disilene moiety among these complexes and related bis(trimethylphosphine)(disilene)palladium and 14-electron (tricyclohexylphosphine)(disilene)palladium revealed that the pi-complex character is sensitive to the residual ligands and increases with decreasing the strength of sigma-donation from the ligands.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Japan.
authors.forename: Takeaki
authors.initials: T
authors.lastname: Iwamoto
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Sekiguchi
authors.forename: Naoki
authors.initials: N
authors.lastname: Yoshida
authors.forename: Chizuko
authors.initials: C
authors.lastname: Kabuto
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Kira