A hydrogen-bonded dimer of a novel Co(II) complex of monoethanolamine with thiocyanate: Synthesis, spectra, thermal behaviour and crystal structure

YILMAZ V. T., Andaç Ö., KARADAĞ A., Harrison W. T.

Journal of Molecular Structure, cilt.641, sa.2-3, ss.119-124, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 641 Sayı: 2-3
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1016/s0022-2860(02)00105-9
  • Dergi Adı: Journal of Molecular Structure
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.119-124
  • Anahtar Kelimeler: Crystal structure, Hydrogen-bonded dimer, Monoethanolamine complex, Thermal analysis
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

A strongly hydrogen-bonded dimer of the Co(II) complex of monoethanolamine, [Co(meaH)3][Co(mea)(meaH)2](SCN)3, was synthesized and characterized by single crystal X-ray diffractometry, UV-Vis and IR spectroscopy. The complex consists of [Co(meaH)3]2+ and [Co(mea)(meaH)2]+, and three SCN- anions. In each cation, the Co(II) ion is coordinated by a distorted octahedral arrangement of three monoethanolamine ligands in a bidentate manner. One of the monoethanolamine ligands in the [Co(mea)(meaH)2]+ cation is in the deprotonated form by losing its hydroxyl hydrogen. The complex cation units are held together by three strong O-H...O bonds formed between three ethanolic oxygens forming a hydrogen-bonded dimer of [Co(meaH)3]2+⋯[Co(mea) (meaH)2]+. The hydrogen bonding O⋯O distances are significantly short at ca. 2.41(4) Å. The SCN- anions are involved in hydrogen bonding connecting the dimeric units to give a three dimensional infinite network. During the thermal decomposition process, the complex loses the monoethanolamine ligands in the first stage, followed by the decomposition of the SCN- anions at higher temperatures to give metallic cobalt as the end product. © 2002 Elsevier Science B.V. All rights reserved.