SQUARE AND BICAPPED TRIGONAL ANTIPRISMATIC THORIUM(IV) TETRAKIS(1-PHENYL-3-METHYL-4-ACYLPYRAZOL-5-ONOATE) COMPLEXES - SYNTHESIS AND SPECTROSCOPIC STUDIES

摘要

Thorium tetrakis(1-phenyl-3-methyl-4-acylpyrazol-5-onoates) have been synthesised and characterized spectroscopically using UV, IR and C-13 NMR spectroscopy. IR spectral data showed a stereochemically differing CO-Th bonding system present in some of the complexes. The structures of some ol the Th(IV) complexes such as that of the 4-propionylpyrazolonate were shown to be square antiprisms and others such as that of the 4-acetylpyrazolonoate were bicapped trigonal antiprisms. [References: 14]