SYNTHESIS AND CHARACTERIZATION OF O,O' DIALKYL AND ALKYLENE DITHIOPHOSPHATES OF LANTHANUM(III) AND THEIR ADDUCTS WITH NITROGEN AND PHOSPHORUS DONOR BASES

摘要

Lanthanum(III) tris(dithiophosphates), [La{S_2P(OR)_2}_3] (where R= -CH_2CH_2CH_3 or -C_6H_5) and [La{S_2PO_2G}_3] [where G = -C(CH_3)_2CH_2CH(CH_3)-, -CH_2C(CH_3)_2CH_2-, -C(CH_3)_2C(CH_3)_2- and -CH_2CH_2CH(CH_3)-] were prepared in methanolic solutions of anhydrous LaCl_3 and ammonium dithiophosphates. Addition complexes of the type [La{S_2P(OR)_2}_3 centre dot nL] and [La{S_2PO_2G}_3 centre dot nL] [where n = 1, L = N_2C_(10)H_8 or N_2C_(12)H_8 and n = 2, L = P(C_6H_5)_3] were prepared by reaction of lanthanum(III) tris(dithiophosphates) and nitrogen or phosphorus donor bases in benzene. These newly synthesized derivatives have been characterized by elemental analyses, molecular weights, IR, ~1H and ~(31)PNMR spectral measurements. Coordination numbers of six and eight are suggested for lanthanum(III) in these derivatives.