[Me 4N] 2[(WOS 3Ag) 2]: a novel quasi-one-dimensional compound

Orange–yellow plate-like crystals of a new polymeric complex [Me 4N] 2[(WOS 3Ag) 2] were obtained at room temperature from the reaction of a suspension of [Me 4N] 2[WOS 3] in MeCN with solid AgCN. The new compound is obviously formed by cyanide elimination of primary [WOS 3(AgCN)] 2−. It is monoclinic space group P2 1/ c with unit cell parameters a=20.44(2) Å, b=9.655(6) Å, c=11.913(5) Å, β=99.06(2)°, Z=4. The crystal structure was determined from single crystal diffractometer data (Mo-K α radiation) and refined to R=0.070 (2979 reflections, 199 variables). The structure is characterized by infinite anionic chains, ∞ 1 [(WOS 3Ag) 2] 2−. The infrared spectrum of the complex (KBr powder) shows the terminal ν(WO) as strong absorption bands found at 913 and 905 cm −1. The bridging ν(WS) shows bands at 438 (vs) and 434 (sh) cm −1. The anionic mass spectrum shows a peak at m/ z 404 for [WOS 3Ag] −. In addition, the primary formation of the potential monomeric precursor [WOS 3(AgCN)] 2− could be established in the filtrate by mass spectroscopy. Graphic