title: Hydrogen bonding cavities regulating redox behavior and binding of metal-bound ligands.
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.
authors.affiliation: School of Chemistry, The University of Edinburgh, Edinburgh EH9 3JJ, U.K.
authors.forename: Laurent
authors.initials: L
authors.lastname: Metteau
authors.forename: Simon
authors.initials: S
authors.lastname: Parsons
authors.forename: Juan C
authors.initials: JC
authors.lastname: Mareque-Rivas
mesh_terms: D006860:Hydrogen Bonding; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D010084:Oxidation-Reduction
chemical_list: D008024:Ligands; D008670:Metals