Transition metal complexes of N-substituted derivatives of 2-[(N-acetyl) amino]pyridine
作者:J. Bould、B.J. Brisdon
DOI:10.1016/s0020-1693(00)91089-2
日期:1976.1
Synthesis, X-ray crystal structures, spectroscopic properties and magnetism of copper(II) compounds of formula trans-Cu(LL)2(anion)2, with N-(pyridin-2-yl)acetamide and N-(pyrimidin-2-yl)acetamide as ligands: Unexpected absence of hydrogen bonding to the non-coordinating nitrogen atom of the ligand
作者:Gerard A. van Albada、Isja Dominicus、Ilpo Mutikainen、Urho Turpeinen、Jan Reedijk
DOI:10.1016/j.poly.2007.04.035
日期:2007.8
A coordination chemistry and lattice engineering study of 10 new Cu(II) compounds with the ligands N-(pyridin-2-yl)acetamide (Haap) and N-(pyrimidin-2-yl)acetamide (Haapm) with the general formula Cu(LL)(2)(anion)(2) is described. The bidentate ligands bind in a N,O-chelating mode and the used anions are ClO4-, CF3SO3-, BF4-, NO3-, Cl-. For five of the compounds a 3D crystal and molecular structure analysis has been performed. All Cu(II) ions have a tetragonal-based geometry; the basal plane of each copper consists of a N and an O atom of two different bischelating N,O-donor ligands; Cu-N distances vary from 2.00 to 2.04 angstrom and Cu-O distances are between 1.93 and 1.96 angstrom, whereas the apical sites are occupied by an atom of the anions, thereby providing an elongated octahedral geometry (Cu-anion contacts are between 2.41 and 2.81 angstrom).The intermolecular interactions are all involving multiple H-bond systems, providing a 2D polymeric array for most of the compounds. The chloride compound forms a zigzag polymeric array of hydrogen bonds. Most surprisingly, the lion-coordinating pyrimidine nitrogen atom, does not take part in any lattice hydrogen bonding. (c) 2007 Elsevier Ltd. All rights reserved.