Synthesis and Spectroscopic [Electronic,IR, NMR (1H, 13C, 89Y)] Characterization of Hexaisopropoxoniobates and ‐Tantalates of Yttrium(III) and Lanthanides(III) |
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Authors: | Shashank Mishra Upendra M Tripathi Anirudh Singh Ram C Mehrotra |
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Abstract: | Hexaisopropoxoniobates/tantalates of lathanides of the type Ln{(μ‐OPri)2M(OPri)4}3] (M = Nb, Ln = Y( 1 ), La( 2 ), Nd( 3 ), Er( 4 ), Lu( 5 ); M = Ta, Ln = Y( 6 ), Gd( 7 )) have been prepared by the reactions of LnCl3.3PriOH with three equivalents of KM(OPri)6 in benzene. Reactions in 1:2 molar ratio of LnCl3.3PriOH with KTa(OPri)6 yielded derivatives of the type {(PriO)3Ta(μ‐OPri)3}Ln{(μ‐OPri)2Ta(OPri)4}(Cl)] (Ln = Y( 8 ), Gd( 9 )), which on interactions with one equivalent of KOPri afforded {(PriO)3Ta(μ‐OPri)3}Ln {(μ‐OPri)2Ta(OPri)4}(OPri)] (Ln = Y( 10 ), Gd( 11 )). All these derivatives have been characterized by elemental analyses and molecular weight measurements as well as by their spectroscopic IR, 1H and 13C NMR (Y, La, Lu), electronic (Nd, Er)] studies. 89Y NMR studies have also been carried out on derivatives ( 6 ), ( 8 ), and ( 10 ). |
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Keywords: | Heterobimetallic alkoxides Alkoxometallates Hexaisopropoxoniobates/tantalates |
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