ic060009n_si_001.cif (140.5 kB)
Pyrazolate-Bridging Dinucleating Ligands Containing Hydrogen-Bond Donors: Synthesis and Structure of Their Cobalt Analogues
dataset
posted on 2006-05-01, 00:00 authored by Paul J. Zinn, Douglas R. Powell, Victor W. Day, Michael P. Hendrich, Thomas N. Sorrell, A. S. BorovikConvergent preparative routes to new urea−pyrazolate dinucleating
ligands are described. Metal complexes of these ligands have
hydrogen bond donors that are proximal to the metal centers that
interact with other coordinated species. This is exemplified by CoII
dimers with CoII−μ-Cl−CoII motifs, in which the chloro ligand is
involved in four intramolecular hydrogen bonds. These noncovalent
interactions appear to influence the CoII−Cl bonds, which are
unusually long, having lengths greater than 2.5 Å.