Anion control of isomerism, crystal packing and binding properties in a mononuclear zinc complex

Fielden, J., Gunning, P.T., Long, D.-L. , Nutley, M., Ellern, A., Kögerler, P. and Cronin, L. (2006) Anion control of isomerism, crystal packing and binding properties in a mononuclear zinc complex. Polyhedron, 25(18), pp. 3474-3480. (doi: 10.1016/j.poly.2006.06.044)

Abstract

The coordination chemistry of the tetradentate pyridyl N-donor ligand cis-3,5-<i>bis</i>-[2-pyridinyleneamin]-trans-hydroxycyclohexane (DDOP) has been investigated with zinc(II) nitrate and triflate. The resulting complexes, [Zn(DDOP)(H₂O)(NO₃)](NO₃) (1), and [Zn(DDOP)(H₂O)(OTf)](OTf) (2) differ not only in their counterions, but also the arrangement of the axial ligands and their solid state hydrogen bonded networks. Isothermal titration calorimetry was used to assess the difference in binding properties exhibited by the two zinc complexes at physiological pH in an aqueous environment. A series of coordinating amino acids were found to preferentially bind to the mononuclear zinc triflate (1) complex over the corresponding nitrate (2) assembly, with histidine exhibiting a two centre binding mode.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Nutley, Mrs Margaret and Long, Dr Deliang and Fielden, Dr John and Cronin, Professor Lee
• Authors: Fielden, J., Gunning, P.T., Long, D.-L., Nutley, M., Ellern, A., Kögerler, P., and Cronin, L.
• Subjects: Q Science > QH Natural history > QH345 Biochemistry; Q Science > QP Physiology
• College/School: College of Science and Engineering > School of Chemistry; University Centres > Glasgow Materials Research Initiative
• Journal Name: Polyhedron
• ISSN: 0277-5387