catena-Poly[[{N,N-dimethyl-N′-[1-(pyridin-2-yl)ethylidene]ethane-1,2-diamine-κ³N,N′,N′′}(thiocyanato-κN)cadmium]-μ-thiocyanato-κ²S:N]

Abstract

In the title compound, [Cd(NCS) 2 (C 11 H 17 N 3 )] n , the Cd II atom is octa­hedrally coordinated by the N , N ′, N ′′-tridentate Schiff base ligand and one terminal thio­cyanate N atom. Two trans - N:S -bridging thio­cyanates complete the N 5 S donor set around the Cd atom. In the crystal, adjacent Cd II ions are linked by the thio­cyanate N:S -bridges into polymeric chains along the c axis.

{N,N-Dimethyl-N′-[1-(2-pyridyl)ethylidene]ethane-1,2-diamine-κ3N,N′,N′′}bis(thiocyanato-κN)copper(II)

“…Similar arrangements are observed in the structures of related mixed-ligand copper(II) complexes (Xue et al, 2010;Yue et al, 2005). Different from those, in the cadmium(II) thiocyanate complex of the same Schiff base (Suleiman Gwaram et al, 2011), N:S bridging thiocyanates connect the metal ions into an octahedral polymeric structure. The Addison τ values (Addison et al, 1984) of 0.13 for Cu1 complex and 0.14 for Cu2 complex (τ = 0 for an ideal square pyramid and τ = 1 for an ideal trigonal bipyramid) imply distorted square-pyramidal geometries of the molecules.…”

“…For the structures of similar copper(II) isothiocyanate complexes, see: Xue et al (2010); Yue et al (2005). For the structure of the polymeric cadmium thiocyanate complex of the same Schiff base, see: Suleiman Gwaram et al (2011). For a description of the geometry of complexes with five-coordinate metal atoms, see: Addison et al (1984).…”