Complementary anion binding by bidentate boron-containing Lewis acids

Coombs, Natalie D., Aldridge, Simon, Wiltshire, Gavin, Kays, Deborah L. ORCID: https://orcid.org/0000-0002-4616-6001, Bresner, Christopher and Ooi, Li-ling 2005. Complementary anion binding by bidentate boron-containing Lewis acids. Journal of Organometallic Chemistry 690 (11) , pp. 2725-2731. 10.1016/j.jorganchem.2005.01.015

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Abstract

Anion binding by the pyroborates (catB)2O (1, cat = O2C6H4-1,2) and (S,S-Ph2C2H2O2B)2O (2) has been investigated by spectroscopic, structural and titration methods. 1 has been shown to act as a bifunctional Lewis acid, exemplified by the complementary (1:1) binding of bidentate bases such as acetate and dihydrogen phosphate. The former complex has been characterized in the solid state by X-ray diffraction and a binding constant of 1500 ± 550 M−1 determined in chloroform solution. The reaction of 2 with acetate, by contrast, leads to breakdown of the Lewis acid chelate and to the formation of the homochiral borate anion [(S,S-Ph2C2H2O2)2B]− in good yield (84% based on the chiral component).

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Chemistry
Publisher:	Elsevier
ISSN:	0022-328X
Date of Acceptance:	11 January 2005
Last Modified:	12 Jul 2024 11:00
URI:	https://orca.cardiff.ac.uk/id/eprint/170299

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