Synthesis and characterization of O,O′-dialkyl and alkylene dithiophosphates of thorium(IV) and their adducts with nitrogen and phosphorus donors

Abstract

Thorium(IV) tetrakis(dithiophosphates), [Th{S2P(OR)2}4] (where R = –CH2CH2CH3 or –C6H5) and [Th{S2PO2G}4] [where G = –C(CH3)2CH2CH(CH3)–, –CH2C(CH3)2CH2–, –C(CH3)2C(CH3)2– and –CH2CH2CH(CH3)–] were prepared in methanolic solution of Th(NO3)4 ≅ 6H2O and ammonium dithiophosphates. Adducts of the type [Th{S2P(OR)2}4 ≅ nL] and [Th{S2PO2G}4 ≅ nL] [where n = 1, L = N2C10H8 or N2C12H8 and n = 2, L = P(C6H5)3] were prepared by the reaction of thorium(IV) tetrakis(dithiophosphates) and nitrogen or phosphorus donors in benzene. These newly synthesised derivatives have been characterized by elemental analyses, molecular weights, IR, 1H and 31P NMR spectral measurements. Coordination numbers of eight and ten are suggested for thorium(IV) in these derivatives.