Organic compounds of niobium: reactions of niobium penta-alkoxides with acyl halides

Mehrotra, R. C. ; Kapoor, P. N. (1966) Organic compounds of niobium: reactions of niobium penta-alkoxides with acyl halides Journal of the Less Common Metals, 10 (5). pp. 348-353. ISSN 0022-5088

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Official URL: http://dx.doi.org/10.1016/0022-5088(66)90135-4

Related URL: http://dx.doi.org/10.1016/0022-5088(66)90135-4

Abstract

Compounds Nb(OEt)4X, Nb(OEt)3X2, Nb(OEt)2X3 · CH3COOEt and Nb(OEt)Cl4 · CH3COOEt, NbOBr3 · CH3COOEt (where X is chloride or bromide) have been isolated by the reactions of niobium penta-ethoxide with acetyl chloride and bromide. The reactions of niobium penta-isopropoxide and tert.-butoxide with acyl halides in equimolar ratios yield products of the type Nb(OR)4X; the products with excess of acyl halides corresponds to NbOX3.CH3COOR. However, the reaction in the case of penta-tert.-butoxide and acetyl chloride yielded finally NbO(OAc)0.75Cl2.25 · CH3COOBut. The reaction of niobium penta-ethoxide with dry hydrogen chloride gas yielded triethoxide dichloride derivative. Only niobium tetra-alkoxide monochloride derivatives could be distilled or sublimed and these were found to be dimeric in boiling benzene.

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ID Code:30146
Deposited On:22 Dec 2010 10:52
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