摘要:
Treatment of [Hg(EPh)(2)] with 2 equivalents of [Cu(PPh3)(2)Cl] gave the trinuclear Hg/Cu/S(Se) complexes [Hg(mu-EPh)(2)(CuCl(PPh3)(2))] (E = S 1, Se 2) in which the two copper centers are ligated by the [PhE](-) ligands of the [Hg(EPh)(2)]. A similar reaction of [Hg(EPh)(2)] with [Ag(PPh3)(2)Cl] gave rise to isolation of the dinuclear compounds [Hg(SePh)(mu-SePh)(mu-Cl)Ag(PPh3)(2)] (E = S 3, Se 4) in which the coordination geometry of the mercury atom is a slightly distorted T-shape. Reactions of the homoleptic tetrahedral species [Cd(EPh)(4)](2-) with 2 equivalents of [Cu(PPh3)(2)NO3] afforded the neutral linear trinuclear complexes [Cd(mu-EPh)(4)[Cu(PPh3)(2))(2)](E = S 5, Se 6) in which two [Cu(PPh3)(2)](+) fragments bind with the opposite edges of a tetrahedral [Cd(EPh)(4)](2-) moiety via the sulfur or selenium atoms of the PhE- ligands. A similar reaction of [Me4N](2)[Cd(SPh)(4)] with 2 equivalents of [Ag(PPh3)(2)NO3] gave an analogous complex [Cd(mu-SPh)(4){Ag(PPh3)(2)}(2)] (7), whereas the reaction of [Me4N](2)[Cd(EPh)(4)] with an equivalent amount of [Ag(PPh3)(2)NO3] under similar conditions afforded the neutral heptanuclear complexes [Cd-3(mu-EPh)(6) (mu(3)-EPh)(4)(AgPPh3)(4)] (E = S 8, Se 9) which comprise three [(AgPPh3)](+) fragments side-ligated and one [(AgPPh3)](+) fragment side-capped with the trinuclear cadmium-thio(seleno)phenolate [Cd-3(mu-EPh)(9) (mu(3)-EPh)](4-) moieties via the sulfur atoms of thiophenolates in 8 and the selenium atoms of selenophenolates in 9. The nonlinear optical properties of two neutral heptanuclear complexes 8 and 9 have been examined by z-scan techniques with 7-ns pulses at 532 nm. (C) 2011 Elsevier Ltd. All rights reserved.