Synthese und Struktur von Tetrachloro[4-tert-butyl-2(diphenylphosphanyl-κP-methyl)phenolato-κO]tantal(V), ein neuartiger TaV-Komplex mit einem chelatisierenden Aryloxyphosphanliganden |
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Authors: | Ute Hagenau Jürgen Heck |
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Abstract: | Synthesis and Structure of Tetrachloro4- tert -butyl-2(diphenylphosphanyl-κP-methyl)phenolato-κO]tantalum(V), a Novel TaV Complex with a Chelating Aryloxy Phosphane Ligand 4-tert-Butyl-2-(diphenylphosphanylmethyl)anisol ( 1 ) is prepared from 2-chlormethyl-4-tert-butylanisol and potassium diphenylphosphide in very good yields as a novel oxygen-phosphorus compound with potentially hemilabile ligand properties. Compound 1 reacts with tantalum pentachloride under cleavage of methylchloride revealing the complex tetrachloro4-tert-butyl-2-(diphenylphosphanyl-κP-methyl)phenolato-κO]tantalum(V) ( 2 ) with a distorted octahedrally coordinated tantalum atom and a chelating aryloxy phosphane ligand. Complex 2 crystallizes in the tetragonal, chiral space group P41212 with a = 11.719(5), c = 37.95(5) Å, V = 5171(7) Å3, Z = 8. 31P NMR spectroscopic studies of 2 establish the coordination of the phosphane unit to the TaV center in solution. |
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Keywords: | Tantalum Structure elucidation Phosphanes Aryloxy ligand Chelates 181Ta– 31P spin-spin coupling |
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