Assembly of Novel 2D and 3D Heterometallic Sb^III–Cu^I Polymers Based on Antimony(III) Thiolates as Metallothiolato Ligands

Abstract

A new type of neutral heterometallic Sb III -Cu I thiolate coordination polymer has been synthesized under solvothermal conditions by using antimony(III) thiolates as metalloligands and CuSCN as the source of the second metal ion. Reaction of [Sb(edt)Cl] (1) (edt = ethane-1,2-dithiolate) with 1 equivalent of CuSCN affords [{Sb 2 (edt) 2 (µ 3 -S)CuCl(CuSCN)} n ] (2), which features a 2D layer consisted of -CuSCNCuSCNchains and {Sb 2 (edt) 2 (µ 3 -S)CuCl} units. During the reaction, 1 was converted into a sulfur-bridged dimer Sb(edt) 2 S, which behaves simultaneously as a bridging and chelating ligand through all of its sulfur atoms to connect four Cu + ions in the framework structure of 2. Replacement of Cl -in 1 with pymt -gives a new antimony(III) thiolate formulated as [Sb(edt)-(pymt)] (3) (pymt = 2-pyrimidinethiol), which was further treated with CuSCN to afford coordination polymers