Long-Sheng Wang

Self-assembly of luminescent Sn(IV)/Cu/S clusters using metal thiolates as metalloligands.

Through the use of (Bu4N)2[Sn3S4(edt)3] (edt=SCH2CH2S(2-)) and Sn(SPh)4 as metalloligands, three neutral compounds have been obtained: [(Ph3P) 2Cu] 2SnS(edt)(2).2CH2Cl2.H2O (1a), [(Ph3P) 2Cu]2SnS(edt)2.2DMF.H2O (1b), and [(Ph3P)Cu] 2Sn(SPh)(6).3H 2O (2). Single-crystal X-ray diffraction studies revealed that compounds 1a and 1b contain the same neutral butterfly-like [(Ph3P)2Cu]2SnS(edt)2 cluster, which consists of one central SnS 5 dreich trigonal bipyramid sharing one vertex and two sides with two slightly distorted CuS 2P2 tetrahedrons. Compound 2 has a linear [(Ph3P)Cu]2Sn(SPh)6 cluster that is composed of a central distorted SnS 6 octahedron sharing two opposite planes with two slightly distorted CuS 3P tetrahedrons. Compound 1a exhibited an emission at 568 nm (tau=12.86 micros) in the solid state, while in CH 2Cl 2 solution, 1a exhibited a green emission at 534 nm (tau=4.75 micros). Compound 2 showed an intense red emission at 696 nm (tau=3.64 micros) upon excitation at 307 nm in the solid state.

A new strategy for the preparation of H2tdet intermediate–synthesis and crystal structure of {α-[Sn(edt)2(tdet)]}·{β-[Sn(edt)2(tdet)]} (edt = ethane-1,2-dithiolate, tdet=diethylenetrithiolato)

Abstract A mononuclear tin(IV) complex {α-[Sn(edt)2(tdet)]}·{β-[Sn(edt)2(tdet)]} was synthesized by the reaction of Sn(edt)2 and NaOH under hydrothermal conditions and characterized by X-ray structure analysis. Under hydrothermal conditions, two edt ligands turned into one tdet and this provides a new strategy for the preparation of H2 tdet from cheap material. In the complex, the distances of Sn–S (thiolate) are about 2.4 A, but the distances of Sn–S (thioether) are about 2.8 A. Two isomers were found in the molecule.

A simple method for the preparation of octanuclear tin (IV) oxosulfide cluster and the conversion of it to decanuclear cluster

Abstract An octanuclear tin (IV) complex [(n-C4H9)4N]4 [Sn8(μ4-O)2(μ2-OH)2S12Cl6] 1 was synthesized simply by the reaction of Na2S·7H2O and SnCl4·5H2O in DMF. The yield is high and this may provide a new strategy for the preparation of other octanuclear tin (IV) oxosulfide cluster. When 1 was heated under hydrothermal conditions, a decanuclear cluster [(n-C4H9)4N]4 [Sn10(μ4-O)4(μ3-S)4(μ2-S)12Cl4]·(4,4′-bipy) 2 may be obtained. The two clusters were all characterized by X-ray structure analysis.

Syntheses, structures and characterization of the tetranuclear tin(IV) oxysulfide clusters ( n -Bu4N)2[Sn4(μ4-O)S5(edt)2X2] (X=Cl, Br) (edt=1,2-ethanedithiolate)

During attempts to prepare cubane-like clusters from the precursor (Bu4N)2[Sn3S4(edt)3] (edt = 1,2-ethanedithiolate), two new tetranuclear tin(IV) oxysulfide clusters, (Bu4N)2 [Sn4(μ4-O)S5(edt)2Cl2] (1) and (Bu4N)2[Sn4(μ4-O)S5(edt)2Br2] (2) were unexpectedly obtained by reaction of (Bu4N)2[Sn3S4(edt)3] with SnX2 (X = Cl, Br). X-ray crystal structure analyses show that the two compounds possess an isostructural anionic cluster with a highly distorted tetrahedral metal skeleton. The two compounds have been characterized spectroscopically.