Syntheses, spectral and thermal analyses of heteronuclear aqua(2-methylpyrazine)metal(II) complexes with tetracyanonickelate ion and crystal structure of supramolecular [Cd(H2O)(2mpz)Ni(mu-CN)(4)] (n) complex

KÜRKÇÜOĞLU G. S., YEŞİLEL O. Z., Kavlak I., Buyukgungor O.

STRUCTURAL CHEMISTRY, cilt.19, sa.6, ss.879-888, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 6
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1007/s11224-008-9354-3
  • Dergi Adı: STRUCTURAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.879-888
  • Anahtar Kelimeler: Cyano-bridging complexes, Tetracyanonickelate, 2-Methylpyrazine complexes, Vibrational spectra, AROMATIC GUEST MOLECULES, HOFMANN-TYPE COMPLEXES, IR-SPECTRA, VIBRATIONAL-SPECTRA, METAL-COMPLEXES, HOST LATTICE, BENZENE, CD, CLATHRATE, 2-METHYLPYRAZINE
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Polymeric tetracyanonickelate complexes of the type [M(H2O)(2mpz)Ni(mu-CN)(4)] (n) (2mpz = 2-methylpyrazine, M = Mn(II) (1) or Cd(II) (2)) have been prepared and characterized by FT-IR, Raman spectroscopy, thermal, and elemental analyses. The crystal structure of supramolecular [Cd(H2O)(2mpz)Ni(CN)(4)] (n) complex has been determined by X-ray single crystal diffraction. It crystallizes in the orthorhombic system, space group Pnma. The structure consists of corrugated and cyanide-bridged polymeric two-dimensional networks. In the Hofmann-type complexes, the coordination environment of the M(II) ions can be described as distorted octahedral geometry, whereas around the Ni(II) center has square planar geometry. The spectral features suggest that the 2mpz is coordinated to metal ions of the adjacent layers of [M-Ni(CN)(4)] (n) as monodentate ligand. The thermal decomposition of these complexes takes place in three stages: (i) dehydration, (ii) decomposition of the 2-methylpyrazine ligands, and (iii) release of the CN groups and burning of organic residue.