One-dimensional cyano-bridged heterometallic (Cu/Ni and Cu/Pd) complexes with 1-ethylimidazole

• Published in: Polyhedron 2012-10, Vol.47 (1), p.126-133
• Main Authors: Çetinkaya, Fulya, Kürkçüoğlu, Güneş Süheyla, Yeşilel, Okan Zafer, Hökelek, Tuncer, Dal, Hakan
• Format: Article
• Language: English
• Subjects: 1-Ethylimidazole complexes; Cyano-bridged complexes; Heterometallic complexes; Tetracyanonickelate(II); Tetracyanopalladate(II)
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2012.08.041

Two new cyano-bridged heteronuclear polymeric complexes, {[Cu(etim)4Ni(μ-CN)2(CN)2]·H2O}n (1) and [Cu(etim)4Pd(μ-CN)2(CN)2]n (2) (etim = 1-ethylimidazole) were synthesized and characterized. They crystallize in the triclinic system and space groups P1¯. The Ni(II) or Pd(II) ion is four coordinate with four cyanide-carbon atoms in a square-planar geometry and the Cu(II) ion exhibits a distorted octahedral coordination by four etim ligands and two bridging cyano groups. The crystal packing of 1 is composed of hydrogen bonding and C−H···π interactions. Two new cyano-bridged heteronuclear polymeric complexes, {[Cu(etim)4Ni(μ-CN)2(CN)2]·H2O}n (1) and [Cu(etim)4Pd(μ-CN)2(CN)2]n (2) (etim=1-ethylimidazole) were synthesized and characterized by FT-IR and Raman spectroscopies, thermal (TG, DTG and DTA) and elemental analyses and single crystal X-ray diffraction techniques. They crystallize in the triclinic system and P1¯ space group. The two compounds are isostructural, and their crystal structures are formed by quasi-linear chains exhibiting [–Cu(etim)4–μ–NC–M(CN)2-μ-CN–]n composition. The Ni(II) or Pd(II) ions is four coordinate with four cyanide-carbon atoms in a square planar geometry and the Cu(II) ion exhibits a distorted octahedral coordination by four etim ligands and two bridging cyano groups.