Coordination polymers of Mn(II) and Cu(II) orotate with 2-methylimidazole and N,N,N ',N '-tetramethylethylenediamine ligands: Syntheses, spectroscopic and thermal analyses and crystal structures of mer-[Mn(mu-HOr)(H2O)(2-meim)(2)](n) and thermochromic {[Cu(mu-HOr)(tmen)] center dot 1.5H(2)O}(n) complexes

YEŞİLEL O. Z., ERER H., Mutlu A., BÜYÜKGÜNGÖR O.

POLYHEDRON, cilt.28, sa.1, ss.150-156, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.poly.2008.09.024
  • Dergi Adı: POLYHEDRON
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.150-156
  • Anahtar Kelimeler: Orotate complexes, Coordination polymers, Thermochromism, 2-Methylimidazole complexes, N,N,N ',N '-Tetramethylethylenediamine complexes, OROTIC-ACID, MOLECULAR-STRUCTURE, UNPRECEDENTED COORDINATION, SPECTROTHERMAL PROPERTIES, VITAMIN-B13 COMPLEXES, MAGNETIC-PROPERTIES, MONOHYDRATE, COBALT(II), NI(II), MANGANESE(II)
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

The syntheses, FT-IR and UV-Vis spectra, thermal analyses and crystal structures of Mn(II) and Cu(II) ororate coordination polymers with 2-methylimidazole (2-meim) and N,N,N',N'-tetramethylethylenediamine (tmen) ligands are described. The orotate ligand acts as a bridging ligand with two different coordination modes, the {mer-[Mn(mu-HOr)(H2O)(2-meim)(2)]}(n), (1) complex displays an linear chain structure in which each Mn(II) ion exhibits a distorted octahedral coordination by a tridentate orotate, two 2-meim and one aqua ligand. in {[Cu(mu-HOr)(tmen)] center dot 1.5H(2)O}(n) (2), the Cu(II) ion is coordinated by a tridenrate orotate and one bidentate tmen ligand, and exhibits a square pyramidal geometry. These polymer chains are linked by hydrogen-bond interactions forming a three-dimensional network. Complex 2 exhibits an irreversible thermochromic effect. After dehydration, the color of the complex changes from blue to green. (C) 2008 Elsevier Ltd. All rights reserved.