A Novel Copper(II)-Hydrogen Oxalate Coordination Polymer Showing a New Coordination Mode

YEŞİLEL O. Z., ERER H., ODABAŞOĞLU M., BÜYÜKGÜNGÖR O.

JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS, cilt.20, sa.1, ss.78-82, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 1
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1007/s10904-009-9319-z
  • Dergi Adı: JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.78-82
  • Anahtar Kelimeler: Hydrogen oxalate complex, Polynuclear complex, Copper(II) complex, MAGNETIC-PROPERTIES, CRYSTAL-STRUCTURES, THERMAL-DECOMPOSITION, COMPLEXES, COBALT(II), LIGANDS, BRIDGE, H2O
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

A novel Cu(II) coordination polymer of general empirical formula {[Cu(mu-HC(2)O(4))(2)(H(2)O)(2)][Cu(HC(2)O(4))(2)]a (TM) 6H(2)O} (n) (1) has been synthesized and characterized by single-crystal X-ray diffraction technique. The complex (1) crystallizes in the triclinic form with P-1 space group. It is quite surprising that single crystal X-ray analysis of 1 illustrates the presence of hydrogen oxalate ligand in the coordination environment of Cu(II) ion. Because oxalate is not present in the starting reaction mixture, it may be derived from the reduction of squarate ligand. In 1, Cu(II) ions exhibit two different coordination environments, forming a distorted octahedral geometry. The Cu1 is coordinated with six oxygen atoms from two bidentate HC(2)O(4) (-) and two aqua ligands, while Cu2 is coordinated with six oxygen atoms from four HC(2)O(4) (-) ligands. The HC(2)O(4) (-) ligand acts in two different coordination modes, as a bidentate and an unprecedented tridentate bridging coordination mode.