Syntheses and structures of complexes {Mo2S2O2}2+ with labile Cl− and DMF ligands

Complex (Me 4 N) 2 [Mo 2 S 2 O 2 Cl 4 ] ((Me 4 N) 2 [ II ]) is synthesized by passing gaseous HCl through a solution of (Me 4 N) 2 [Mo 2 O 2 S 8 ] ((Me 4 N) 2 [ I ]). The recrystallization of (Me 4 N) 2 [ II ] from N , N -dimethylformamide (DMF) gives compound (Me 4 N)[Mo 2 S 2 O 2 Cl 3 (DMF) 3 ] ((Me 4 N)[ III ]). The oxidation of (Et 4 N) 2 [ I ] with iodine in DMF affords the earlier described complex [Mo 2 S 2 O 2 (DMF) 6 ]I 2 ([ IV ] I 2 ). However, this complex was not structurally characterized. The structures of the synthesized compounds are determined by X-ray diffraction analyses (CIF files CCDC nos. 1059924–1059926). Thus, several complexes in which the binuclear fragment {Mo 2 S 2 O 2 } 2+ has a labile coordination environment were synthesized and characterized.