Molecular precursors of alkaline earths: Synthesis and structure of [N(C2H4O)(C2H4OH)2]2Ba·2EtOH. The first structurally characterized barium alkoxide
1991; Elsevier BV; Volume: 10; Issue: 17 Linguagem: Inglês
10.1016/s0277-5387(00)86030-1
ISSN1873-3719
AutoresOlivier Poncelet, L.G. Hubert-Pfalzgraf, Loı̈c Toupet, Jean‐Claude Daran,
Tópico(s)Inorganic Fluorides and Related Compounds
ResumoThe reaction between barium and triethanolamine in toluene/THF affords, after recrystallization in ethanol, the barium alkoxide [N(C2H4O)(C2H4OH2]2Ba·2EtOH, which has been characterized by X-ray crystallography. The tetradentate character of the triethanolamine molecule allows the barium atom to be octacoordinated in a monomeric Ba[(OC2H4)(OHC2H4)2N]2 unit. However, these units are associated by intermolecular hydrogen-bonding due to the ethanol lattice molecules, thus forming an extensive two-dimensional network. The hydrogen-bonding reduces the volatility of the precursor, but is favourable to the formation of gels by hydrolysis.
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