SYNTHESIS, SPECTROSCOPIC AND SINGLE-CRYSTAL STRUCTURAL INVESTIGATIONSOF SEVERAL MIXED-METAL HEXACYANOCOBALTATE DODECAHYDRATES

Single crystals of Tr1.5Zn1.5[Co(CN)6]2.12H2O (where divalent Tr = Cd, Mn, and Co) have been synthesized by the slow diffusion method. Each mixed metal complex crystallized in the cubic space group Fm3mBAR(05h5 , No. 225) with respective lattice constants of 10.5312(6), 10.3265(7) , and 10.2566(14) angstrom. The disordered structures contain 1 1/3 mo lecules in each unit cell. All atoms in each system are disordered and the divalent Tr/Zn atoms are linked to the Co atoms by cyanide bridgi ng. Anisotropic refinements of the structures using a full-matrix leas t-squares program yielded reliability factors of 0.038, 0.034, and 0.0 34, respectively. Important bond lengths are presented as well as the results from optical, thermal gravimetric, and infrared studies. (C) 1 994 Academic Press, Inc.