Browse by author
Lookup NU author(s): Emeritus Professor Bill CleggORCiD,
Dr Ross Harrington
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
The crystal structure of trans-[Cr(en)(2)Br-2]ClO4 (en = 1,2-ethanediamine) has been determined by a single-crystal X-ray diffraction study at 150 K. The complex crystallizes in the space group P (1) over bar of the triclinic system with two mononuclear formula units in a cell of dimensions a = 6.853(4), b = 8.109(5), c = 12.475(8) angstrom, alpha = 81.006(10)degrees, beta = 77.005(10)degrees and gamma = 74.981(10)degrees. The Cr atom is in a slightly distorted octahedral environment, coordinated by four nitrogen atoms of two en ligands and two bromine atoms in trans axial positions. The mean Cr-N(en) and Cr-Br bond lengths are 2.079(3) and 2.4743(10)angstrom, respectively. The five-membered rings are in stable gauche conformations with N1-Cr1-N2 and N3-Cr2-N4 angles of 82.81(11)degrees and 83.67(11)degrees, respectively. The crystal packing is stabilized by a network of N-H center dot center dot center dot O and N-H center dot center dot center dot Br hydrogen bonds. The infrared and electronic absorption spectra are consistent with the results of X-ray crystallography.
Author(s): Choi JH, Clegg W, Harrington RW, Lee SH
Publication type: Article
Publication status: Published
Journal: Journal of Chemical Crystallography
Print publication date: 16/02/2010
ISSN (print): 1074-1542
ISSN (electronic): 1572-8854
Publisher: Springer New York LLC
Altmetrics provided by Altmetric