Syntheses, structure, and magnetic properties of extended structured Cr(II) pentacyanopropenide compounds
Journal article, 2008

The reaction between [Cr-II(NCMe)(4)][BF4](2) and the different cations of [C-3(CN)(5)](-), i.e. [PPN](+) [PPN = bis(triphenylphosphoranylidene)ammonium] and [NMe4](+) in different solvents led to two different tri-solvated structures possessing Cr-II[C-3(CN)(5)](2): Cr-II [C-3(CN)(5)](2).2MeCN.H2O (1) and Cr-II[C-3(CN)(5)](2).(THF) 2THF (2). 2 possesses layers of mu-1, 1'-[C-3(CN)(5)](-) while 1 contain a three- and six-connected 3D pyrite network structure with mu(3)-1,1',3-[C-3(CN)(5)](-) trigonal nodes. Both compounds possess a tetragonally elongated distorted Cr(II) site. Magnetic susceptibility measurements between 5 and 300 K reveal significant antiferromagnetic interactions for both 1 and 2, with theta = -26 and -23 K, respectively, from a fit to the Curie-Weiss law. Upon a comparison to related and similarly structured materials the coupling increases as Cr-II > Fe-II > Mn-II. (C) 2008 Elsevier B.V. All rights reserved.




Extended network structure


Qiuying Zhu

Atta M.) Arif

Lars Öhrström

Chalmers, Chemical and Biological Engineering, Physical Chemistry

Joel S. Miller

Journal of Molecular Structure

0022-2860 (ISSN)

Vol. 890 41-47

Subject Categories

Chemical Sciences

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