Molybdenum(6) thiocyanate complexes

Methods of spectrophotometry and mathematical simulation in H2SO4, HCl, HBr aqueous solutions were used to show that formation of the following ionic forms of Mo(5) with thiocyanate ions: [MoO(NCS)2]+, H3[MoOCl3(NCS)2]+, H4[MoOCl4(NCS)]2+, H4[MoOCl5]2+, H4[MoOCl3(NCS)]3+, H2[MoOCl2]3+ (in 0.7-5 mol/l HCl range) and H4[MoOBr3(NCS)2]2+, H4[MoOBr5]2+ (for 5 mol/l HBr). More pronounced computability of Cl- ions, as compared with bromides, during thiocyanate ions entering the coordination sphere of molybdenum(5) was established. The absence of polymeric forms of complexes confirmed the depolymerizing properties of analyzed ligand. 46 refs.; 3 figs.; 2 tabs