Abstract
A new titanium hexanuclear oxo carboxylato alkoxide complex, with the general formula [Ti 6O 6(OPr i ) 6(OOCBu t ) 6] ( 1), has been synthesized in a reaction of titanium isopropoxide (Ti(OPr i ) 4) with Bu t COOH in the ratio 1:1. The structure was analyzed with the elemental analysis, IR and NMR spectroscopy, and X-ray single-crystal diffraction methods. Crystal structure of 1 was solved in the trigonal centrosymmetric system R 3 ̄ r . Titanium atoms form the hexanuclear cluster, where three μ 3-oxo, two μ-carboxylato bridges and the terminal alkoxide ligand, in the distorted octahedron, surround each central cation. Analysis of spectroscopic data revealed a significant nonequivalence of interactions formed by the carboxylate groups, resulting from the asymmetry of Ti-μ-OOC bonds of carboxylate bridges in the complex molecule. TGA and MS studies suggest that volatile, titanium hexanuclear species may be formed between 423 and 553 K.
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