Crystal structure and magnetic measurements of [Cr(en)3] [ZnCl4]Cl

The compound [Cr(en)3][ZnCl4]Cl has been synthesized by reaction of CrCl3·6H2O, Zn and [Cr(en)3]2(SO4)3 in HCl. Its molecular and crystalline structure was determined by X-ray diffraction methods, being monoclinic, P21/c, a=21.215(3), b=12.532(2), c=13.707(2) Å, β=95.21°, V= 3629(2) Å3, Dx=1.738g cm−3, MW=474.9, Z= 8, F(000)=1928, λ(Mo Kα)=0.71069 Å, μ(Mo Kα)= 27.04 cm−1, 288 K. No significant exchange interactions between Cr(III) cations in the crystalline lattice were found. Curie-Weiss behavior was found in the three directions tested (g1=2.06±0.02,g2= 2.08±0.02,g3=2.09±0.01), T=1.2-1.4 K.The work in Barcelona has been supported by ‘Comisión Asesora de Investigación Cientifica y Técnica, (C.A.T.C.Y.T.)’ Spanish Government, Grant no. 360/81. The work in Chicago was supported by the Solid State Chemistry Program of the Division oMaterials Research of the National Science Foundation under Grant DMR 8515224. This research was also supported by the U.S.-Spain Joint Committee for Scientific and Technological Cooperation. M.C.M. also acknowledges a Doctoral Fellowship from the Spanish M.E.C.Peer Reviewe