Utilization of hydrogen bonds in coordination chemistry: Synthesis and properties of square planar Ni(II)-OH complexes


Darla Powell-Jia, dpowell@uci.edu1, A. S. Borovik, aborovik@uci.edu1, and Joseph W. Ziller, jziller@uci.edu2. (1) Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA 92697, (2) Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, CA 92697-2025
Hydrogen bonds to metal complexes within biomolecules have a crucial role in regulating function. Duplicating these properties in synthetic systems can lead to complexes with different or enhanced reactivity. Using this concept, we have prepare rare examples of monomeric Ni(II)OH complexes, in which the terminal hydroxo ligands are derived from water. The source of the hydroxo ligand was confirmed through isotopic labeling studies: the ν(16O-H) vibration at 3612 cm-1 shifts 12 cm-1 in the 18O-isotopomer, which was prepared with H218O. The complexes have square planar coordination geometry with a relatively short average NiO bond distance of 1.861(6) . In addition, spectroscopic and structural studies reveal distinct H-bonding networks surrounding the Ni(II)OH units, with average OHN distances of 2.657(3) and 2.765(3) . This talk will discuss the preparation and properties of these complexes, and their reactivity with various reagents.

General Inorganic Chemistry
9:00 AM-1:00 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 219, Oral

Division of Inorganic Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008