Trichloro- and triisopropoxy-niobium(V) and tantalum(V) bis-(O,O'-alkylene dithiophosphates): synthesis and characterization.

Sharma, K. R.; Kumar, D.; Kumar, A.; Pandey, S. K.

Trichloro- and triisopropoxy-niobium(V) and tantalum(V) alkylene dithiophosphates, [image omitted] (M = Nb(V) or Ta(V); G =-CHMeCHMe-,-CMe2CMe2-,-CH2CMe2CH2-,-CH2CEt2CH2-or-CMe2CH2CHMe-and X = Cl or OPri) have been synthesized by reaction of metal(V) chloride, MCl5, or triisopropoxymetal(V) dichloride, (PriO)3MCl2, with the sodium salts of O,O'-alkylene dithiophosphoric acids, [image omitted] in 1 : 2 molar ratio in THF under anhydrous conditions. These pink-purple or light-yellow compounds are viscous, semi-solid or solid, hydrolyzable and soluble in common organic solvents. These compounds have been characterized by elemental analyses, molecular weight determinations and spectral studies like IR and heteronuclear NMR (1H, 13C and 31P), which indicated a bidentate mode of chelation of dithio ligands, leading to a pentagonal bipyramidal geometry around the niobium(V) or tantalum(V) centers.

NIOBIUM; TANTALUM; THIOPHOSPHATES; ORGANIC compounds; SODIUM salts; LIGANDS (Chemistry)

Journal of Coordination Chemistry, 2008, Vol 61, Issue 11, p1811

0095-8972

Academic Journal

10.1080/00958970701624286