Table of Contents
Journal of Crystallography
Volume 2013 (2013), Article ID 851679, 5 pages
Research Article

Synthesis and Structural Study of Tris( -pyrazolyl)hexakis(pyrazole)dicobalt(III) Nitrate

Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake, UT 84112-0850, USA

Received 17 May 2013; Accepted 27 August 2013

Academic Editors: A. Aydın, A. R. Ibrahim, P. Macchi, P. R. Raithby, and A. M. Romerosa-Nievas

Copyright © 2013 Yifan Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The new (Hpyz)3Co(μ2-pyz)3Co complex has been isolated as the nitrate salt through a reaction of Co(II) nitrate, Hpyz (pyrazole), triethylamine, and oxygen. The salt crystallizes in the monoclinic space group P21/m with a = 12.5977(3) Å, b = 15.3387(4) Å, c = 14.0800(3) Å, β = 93.0868(15)°, and = 1.464 g/cm3 at 150(1) K. The complex, with pseudo-octahedral coordination about the equivalent cobalt centers, has shorter Co–N distances for the bridging anionic pyz ligands as compared to the neutral Hpyz ligands, with the averages being 1.918(2) and 1.966(4), respectively. The Co–Co separation is 3.568 Å, reflecting the absence of any significant metal-metal interaction.