Synthesis and crystal structure of three mixed-ligand copper(II) complexes with nitrilotriacetic acid
- Russian Academy of Sciences, Kurnakov Institute of General and Inorganic Chemistry (Russian Federation)
- National Academy of Sciences of Belarus, Institute of Molecular and Atomic Physics (Belarus)
The synthesis and X-ray diffraction study of three Ca[CuX(Nta)] . 2H{sub 2}O complexes, where X = Cl (I) or Br (II and III are the monoclinic and orthorhombic modifications, respectively), are performed. Structures I-III are built of [CuX(Nta)]{sup 2-} anionic complexes and hydrated Ca{sup 2+} cations, which are linked by Ca-O bonds into a three-dimensional framework. In I-III, the coordination of the Cu atom includes the N atom and three O atoms of the tetradentate chelate Nta{sup 3-} ligand and the X{sup -} anion in the trans position with respect to N. The Cu-O bond lengths vary in the ranges 1.971-2.268 A in I, 1.958-2.289 A in II, and 2.040-2.110 A in III. The Cu-X bond lengths are 2.223, 2.364, and 2.354 A in I, II, and III, respectively. In I and II, the coordination polyhedron of the Cu atom is approximated by a distorted square pyramid with an O atom at the apical vertex, whereas in III, the polyhedron is described as a distorted trigonal bipyramid with the N and Br atoms at the axial sites. The structures are additionally stabilized by O(w)-H-O and O(w)-H-X hydrogen bonds.
- OSTI ID:
- 21091477
- Journal Information:
- Crystallography Reports, Vol. 51, Issue 3; Other Information: DOI: 10.1134/S106377450603014X; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
Similar Records
Crystal structures of strontium and barium ethylenediaminetetraacetato cobaltates(III), Sr[CoEdta]{sub 2}.9H{sub 2}O and Ba[CoEdta]{sub 2}.8H{sub 2}O: Comparison of the structures of complexes in the series M'[CoEdta]{sub 2}.nH{sub 2}O (M' = Mg, Ca, Sr, Ba; n = 7-10)
Effect of nitrilotriacetate on the mechanism of reduction of copper(II) ions by. cap alpha. -hydroxyalkyl free radicals via complexes with copper-carbon bonds as intermediates. Pulse-radiolytic study. [Pulsed electrons]