The structure of catena-μ-ethylenediaminecadmium(II) tetracyanoniccolate(II) dibenzene clathrate: Cd(en)Ni(CN)4.2C6H6
1972; Elsevier BV; Volume: 6; Linguagem: Inglês
10.1016/s0020-1693(00)91759-6
ISSN1873-3255
AutoresTomoyuki Miyoshi, T. Iwamoto, Y. Sasaki,
Tópico(s)Crystallography and molecular interactions
ResumoThe crystal structure of Cd(en)Ni(CN)4 · 2C6H6 was determined by the single crystal X-ray diffraction method. The crystal belongs to the tetragonal system with space group of P4/m, a = 7.675±0.003 A, c = 8.056±0.010 A, and Z = 1 (Dm = 1.69, Dc = 1.72). The structure was solved by the Fourier method and refined by the block-diagonal least-squares method to an R-value of 0.089 for 619 reflection data. The cadmium atoms and the nickel atoms are linked cross-wise with the cyanide anions on the (001) plane to form the layers of the polymeric metal cyanide complex [CdNi(CN)4]∞, and the layers are stacked along the c-axis. Each ethylenediamine molecule bridges between the cadmium atoms in the layers to make a three-dimensional host lattice. The benzene molecules are enclathrated in the cavities formed by the host lattice. The electron density for each nitrogen atom of the ethylenediamine molecule was found to be distributed over a torus about the CdCd axis. This fact and the 1H-NMR data support the rotation of the ethylenediamine molecule about the axis at room temperature.
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