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

Abstract

Polymeric {[Cu(phen)][Pt(CN)4]} n compound (phen = 1,10-phenanthroline) has been prepared under hydrothermal conditions using CuSO4 · 5H2O, phen and K2[Pt(CN)4] · 3H2O, and characterized by chemical analysis and IR spectroscopy. The X-ray structure analysis [C2/c, a = 6.6057(7), b = 19.747(2), c = 11.5891(13) A, β = 91.723(10)°] 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) A (2×). The remaining four coordination sites are occupied by the nitrogen atoms [Cu–N = 1.975(5) (2×) and 2.574(5) A (2×)] of two pairs symmetrically related bridging cyanido groups. These link Cu(II) with Pt(II) atoms, which lie 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 π–π interactions between the phen molecules. Polymeric {[Cu(phen)][Pt(CN)4]}n (phen = 1,10-phenanthroline) compound creates a wave-like 2D structural network stabilized by π–π interactions between the phen molecules.