Sulfur bridges vanadium

Depending on the crystallization conditions, solvated or unsolvated structures result and the configurations at vanadium varies (Fig. 64). In all structures, vanadium-vanadium and sulfur-sulfur distances are 2.9 and 2.0 A, respectively, and the structural unit has been compared to that of the mineral patronite (VS4), which consists of linear chains of vanadium(IV) ions bridged by S ligands (172). Molecules generally possess a center of inversion and thus are the meso diastereoisomers (172, 696), the exception is [V2(p-S2)2(S2CN—i-Bu2)4], which adopts the rac form, possibly in order to ease the steric crowding caused by the bulky isopropyl substituents (695). 

---