Synthesis and characterization of 3-indole carboxylates of niobocene dichloride

Abstract

The reaction of Cp₂NbCI₂ with sodium salts of 3-indole carboxylic acids viz. 3-indole carboxylic acid (ICNa), 3-indole acetlc acid (IANa), 3-indole propionic acid (IPNa), 3.-indole butyric acid (IBNa) and L-tryptophan (TRNa) in 1: 1 and 1:2 ratios respectively led to the formation of the complexes of the types, [Cp₂NbCI.L] and [Cp₂NbL₂] (where L = 3-indole carboxylate anion). The complexes formed, have been characterized on the basis of eiemental analysis, magnetic moment data and spectral techniques (IR and ESR). The magnetic moment data show paramagnetic character of the complexes.