A structure and reactivity analysis of monomeric Ni(ii)–hydroxo complexes prepared from water
作者:Darla Powell-Jia、Joseph W. Ziller、Antonio G. DiPasquale、Arnold L. Rheingold、A. S. Borovik
DOI:10.1039/b820209e
日期:——
were generated using water as the source of the hydroxo ligand. These complexes are pseudo-square planar, in which the primary coordination sphere contains three nitrogen donors from [H(2)(R)](2-) and the oxygen atom from the hydroxide (Ni-O(H), 1.857(1) A). The Ni(ii)-OH unit also is involved in two intramolecular hydrogen bonds between the urea groups of the [H(2)(R)](2-) and the hydroxo oxygen atom
Development of bio-inspired chelates with hydrogen bond donors: synthesis and structure of monomeric metal acetate complexes with intramolecular hydrogen bonds
作者:Matthew K. Zart、Thomas N. Sorrell、Douglas Powell、A. S. Borovik
DOI:10.1039/b210794p
日期:——
All the complexes have relatively long M–O bond lengths in comparison with other MII–OAc complexes characterized previously. The complexes exhibit intramolecular H-bonds from the urea NH groups to one of the coordinated oxygen atoms of the acetate, causing a lengthening of the MII–OAc bond distances. The NH⋯O bond lengths and vibrational energies in these acetate complexes support weaker H-bonds than