Abstract
Treatment of trinuclear trigonal-bipyramid copper(I) complex [Cu
3(μ
3-Cl)
2(μ-dppa)
3][CuCl
2] with (Me
3Si)
2Se in THF gave a novel μ
8-selenide-centered octanuclear copper(I) complex [Cu
8(μ
8-Se)(μ
4-Se)(μ
4-SeH)
3(μ-dppa)
4][(Ph
2PO)
2N]. The reaction undertook a hydrolysis of dppa ligand and a hydrogenation of active Se
2− anion.
Interaction of Ag(CF
3CO
2) with bis(diphenylphosphino)amide (dppa) in THF gave a tetranuclear Ag
4-coplanar silver(I) complex [Ag
4(μ-dppa)
2(μ
4-O
2PPh
2)
2(μ-CF
3CO
2)
2] (
1). The trinuclear trigonal-bipyramid copper(I) complex [Cu
3(μ
3-Cl)
2(μ-dppa)
3][CuCl
2] (
2) was obtained from the reaction of [CuCl] powder with bis(diphenylphosphino)amide (dppa) in THF. Treatment of
2 with (Me
3Si)
2Se in THF afforded a μ
8-selenide-centered octanuclear copper(I) complex [Cu
8(μ
8-Se)(μ
4-Se)(μ
4-SeH)
3(μ-dppa)
4][(Ph
2PO)
2N] (
3). The structures of
1–
3 were determined by single-crystal X-ray diffraction analyses. Complex
1 comprises a rectangular Ag
4 array with each edge bridged with a pair of μ-dppa, μ
4-O
2PPh
2 and μ-CF
3CO
2 ligands that are approximately perpendicular to each other. Complex
2 contains a trigonal-bipyramid [Cu
3(μ
3-Cl)
2]
+ core surrounded by three μ-dppa ligands. The cationic complex in
3 consists of four [Cu
2(μ-dppa)] fragments side-capped by one μ
4-Se and three μ
4-SeH ligands and center-connected by a μ
8-Se atom.