Insertion of ethyl isothiocyanate into tungsten hexachloride: Crystal structure of ethyl-(4-ethyl-5-thioxo[1.2.4]dithiazolidin-3-ylidene)ammonium oxopentachlorotungstate(VI)

A product of the insertion of two isothiocyanate molecules into the same W-Cl bond, namely, W-Cl-WCl5{N(Et)C(S)N(Et)C(S)Cl} (I), is synthesized by the reaction of WCl6 with EtNCS in a dichloroethane solution. The hydrolysis of compound I results in the formation of single crystals of the complex {Ndloang(Et)C(S)-S-S-Cdroang=NH(Et)}[WOCl5] (II). The structure of crystals II is determined using X-ray diffraction. It is demonstrated that structural units of crystals II are the [WVIOCl5]- anionic complexes and the ethyl-(4-ethyl-5-thioxo[1.2.4]dithiazolidin-3-ylidene)ammonium cations