A hydrogen-bonded dimer of a novel Co(II) complex of monoethanolamine with thiocyanate: Synthesis, spectra, thermal behaviour and crystal structure
Journal of Molecular Structure, cilt.641, sa.2-3, ss.119-124, 2002 (SCI-Expanded, Scopus)
- 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.