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Lewis acidity of tris(pentafluorophenyl) borane: crystal and molecular structure of B(C6F5)(3).OPEt3

Beckett, M. A., Brassington, D. S., Coles, S. J. and Hursthouse, M. B. (2000) Lewis acidity of tris(pentafluorophenyl) borane: crystal and molecular structure of B(C6F5)(3).OPEt3 Inorganic Chemistry Communications, 3, (10), pp. 530-533. (doi:10.1016/S1387-7003(00)00129-5).

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The synthesis and characterisation (TP, multielement NMR spectroscopy) of B(C6F5)(3). L {L = CH3CO . OEt (1), Et3PO (2)} are described together with a single-crystal X-ray diffraction study of 2. The latter reveals an angular B-O-P linkage {161.04(16)degrees} with BO and PO bondlengths of 1.533(3) and 1.4973(17) Angstrom, respectively. Lappert's ?v(CO) and Gutmann's acceptor number (AN) methods have been applied to 1 and 2 to assess the relative Lewis acidity of B(C6F5)(3) which is confirmed as weaker than BF3. A strong linear correlation has been obtained for Gutmann's AN and Childs' H-1 NMR Lewis acidity scales.

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Published date: 1 October 2000
Keywords: acceptor number, borane, lewis acidity, x-ray structure, organophosphine oxideadducts, complexes, phosphine, esters, oxygen


Local EPrints ID: 18985
PURE UUID: 0b636576-f8e3-4835-8dc6-4867559c3ff7

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Date deposited: 18 Jan 2006
Last modified: 17 Jul 2017 16:34

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Author: M. A. Beckett
Author: D. S. Brassington
Author: S. J. Coles
Author: M. B. Hursthouse

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