Low-Dimensional Compounds Containing Cyanido Groups. XX. Synthesis, Crystal Structure and Spectroscopic Properties of Polymeric 1,10-Phenanthroline-N,N′-Copper(II) Tetracyanidoplatinate(II)

Polymeric {[Cu(phen)][Pt(CN)(4)]}(n) compound (phen = 1,10-phenanthroline) has been prepared under hydrothermal conditions using CuSO(4) 5H(2)O, phen and K(2)[Pt(CN)(4)] 3H(2)O, and characterized by chemical analysis and IR spectroscopy The X-ray structure analysis [C2/c, a = 66057(7), b = 19 747(2), c = 11 5891(13) A, beta = 91 723(10)degrees] has revealed that the coordination geometry of the Cu(II) atom, situated on a two-fold rotation axis, is tetragonally distorted octahedral Two nitrogen donor atoms originate from one blocking phen ligand, chelate coordinated in the equatorial plane at the distance of 2 026(4) angstrom (2x) The remaining four coordination sites are occupied by the nitrogen atoms [Cu-N = 1 975(5) (2x) and 2 574(5) A (2x)] of two pairs symmetrically related bridging cyanid() groups These link Cu(II) with Pt(II) atoms, which he on symmetry centers and are coordinated by four C-bonded cyanido ligands in the square planar form Thus infinite 2D wave-like net is formed in the ac plane stabilized by pi-pi interactions between the phen molecules