Hydrates of ytterbium tris-acetylacetonate
Journal Article
·
· Russian Journal of Coordination Chemistry
OSTI ID:171747
- Moscow State Univ. (Russian Federation)
- Nesmeyanov Inst. of Organoelement Compounds, Moscow (Russian Federation)
By means of preparative chemistry, chemical, X-ray structural, X-ray phase, and thermal analysis, the existence of the earlier disputed ytterbium acetylacetonate dihydrate YbA{sub 3} {center_dot} 2H{sub 2}O was proven. The structure of YbA{sub 3} {center_dot} 2H{sub 2}O contains monomeric molecules, linked into layers by hydrogen bonds. The coordination polyhedron of the Yb atom is a slightly distorted square antiprism. The Yb-O distances in the dihydrate are significantly longer than those in the monohydrate YbA{sub 3} {center_dot} 2H{sub 2}O. The absence of correlations between the Yb-O, O-C, and C-C bond lengths in the chelate cycles was observed. This proves the predominantly ionic nature of the metal-ligand bond in these compounds. The scheme for the interconversions of the hydrates of ytterbium tris-acetylacetonate is suggested, and their thermodynamic stability is discussed.
- OSTI ID:
- 171747
- Journal Information:
- Russian Journal of Coordination Chemistry, Journal Name: Russian Journal of Coordination Chemistry Journal Issue: 5 Vol. 21; ISSN RJCCEY
- Country of Publication:
- United States
- Language:
- English
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