Magnetic properties and crystal structure of a 3,5-dimethylpyrazolate-bridged binuclear copper(II) complex

Elerman Y., Elmali A.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, cilt.56, sa.10, ss.970-974, 2001 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 56 Sayı: 10
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1515/znb-2001-1002
  • Dergi Adı: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.970-974
  • Anahtar Kelimeler: binuclear copper(II) complex, super-exchange interactions, antiferromagnetic coupling, ALKOXO-OXYGEN ATOM, DICOPPER(II) COMPLEX, ACETATE ION, BRIDGE
  • Ankara Üniversitesi Adresli: Hayır

Özet

[Cu2L(prz)] (prz = 3,5-dimethylpyrazole and L =1,3-bis(5-bromo-2-hydroxybenzylidene)-propan-2-ol) was synthesized and its crystal structure determined. It crystallizes in the orthorhombic space group Pbca with a=14.160(9), b=15.109(4), c=21.298(5) Angstrom, V=4557(1) Angstrom (3), Z=8. Two copper(II) ions are in a square-planar coordination. The metal coordination sphere is four-coordinate, with a planar N2O2 donor set. The dihedral angle between the two coordination planes is 12.14(7)degrees. The copper(II) centers are separated by 3.365(1) Angstrom and antiferromagnetically coupled (J = -214.3 cm(-1)), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 3 10 K. The Cu-O-Cu angle is 125.9(1)degrees in the super-exchange pathway. The magnetic moment at 310 K is ca. 1.76 B.M. and 0.13 B.M. at 4.6 K.