Spectroscopic and structural studies of 6-(1-methylbenzimidazol-2-yl)-1H-pyridin-2-one and of an unusual T4(2)7(2)6(2)7(2) water tape stabilized by the copper(II) coordination polymer

ŞENGÜL A., Yilmaz I., Karadayı N., Coles S. J.

INORGANICA CHIMICA ACTA, cilt.370, sa.1, ss.369-373, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 370 Sayı: 1
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.ica.2011.02.010
  • Dergi Adı: INORGANICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.369-373
  • Anahtar Kelimeler: Pyridone, Benzimidazole, Copper, Water, Cluster, X-ray structures, CRYSTAL-STRUCTURE, MOLECULAR-STRUCTURE, LIGAND, COMPLEXES, STATE, BENZIMIDAZOLES, TAUTOMERISM, 2-PYRIDONE, SPECTRUM, CLUSTER
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

The solid-state structures of 6-(1-methylbenzimidazol-2-yl)-1H-pyridin-2-one (HL) and the copper(II) complex [Cu(L)(2)(OH2)]center dot 2H(2)O (1) are established by X-ray crystallography and also by means of physicochemical and spectroscopic methods. The molecules of HL form a self-complementary head-to-tail hydrogen-bonded dimer through C-H center dot center dot center dot N and C-H center dot center dot center dot O contacts to give an infinite 1D chain. The copper( II) complex (1) is five-coordinate with distorted trigonal-bipyramidal (TBP) geometry of the N4O donor atoms. The electronic and EPR data are in agreement with the X-ray structure of 1, showing that HL coordinates to copper(II) centre as a mono-anionic ligand through deprotonated pyridone N atom and the tertiary benzimidazole nitrogen atom to form a neutral complex in which the water molecule occupies the fifth position. The 1D water tape, T4(2)7(2)6(2)7(2) is anchored to the host through hydrogen bonds between coordinated water molecule [O(3w)] as acting double H-donor, pyridone carbonyl groups [O(2) and O(1)] as double H-acceptor and the lattice water molecules [O(4w) and O(5w)] as double H-donor and single H-acceptor). (C) 2011 Elsevier B. V. All rights reserved.