Hydrogen bonding cavities regulating redox behavior and binding of metal-bound ligands |
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Authors: | Metteau Laurent Parsons Simon Mareque-Rivas Juan C |
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Institution: | School of Chemistry, The University of Edinburgh, Edinburgh EH9 3JJ, U.K. |
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Abstract: | Binding of 3,5-di-tert-butyl-1,2-benzochatechol (H2DTBC) at Zn(II) complexes of a tetradentate, tripodal ligand L is significantly enhanced (36-4.6 x 10(4) fold), and its reduction potential shifted (90-270 mV) to more positive values by introducing one to three amino hydrogen bond donors. The structure of one of the (L)Zn(DTBC)] complexes is reported and shows intramolecular N-H...O hydrogen bonding between the ligand-based amino group and the Zn(II)-bound chatecholate, which provides an explanation for the observed behavior. |
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