ISSN:
1573-4846
Keywords:
precursor chemistry
;
heterometallic alkoxides
;
molybdenum alkoxides
;
tantalum alkoxides
;
niobium alkoxides
;
tungsten alkoxides
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The alkoxides of molybdenum and other heavy transition elements such as Ta or Nb were found to be unreactive towards each other. The bimetallic derivatives could be obtained either via partial hydrolysis that gave Mo2Ta4O8(OMe)16 (I) or via partial thermolysis that provided access to Mo4Ta2O8(OiPr)14 (II), Mo3Ta2O8(OiPr)10 (III), Mo4Ta4O16(OiPr)12 (IV), Mo4Nb2O8(OiPr)14 (V) and Mo4W2−x Mo x O10(OiPr)12 (VI). I–VI can be isolated only from hydrocarbon media as the presence of alcohols leads to precipitation of insoluble homometallic derivatives of molybdenum. The cathodic reduction of MoO(OR)4 (R = Me, Et) in the presence of LiCl and M(OR)5 (M = Nb, Ta) leads only to formation of LiMo2O2(OMe)7(MeOH) (VII) or LiMo2O2(OEt)7 (VIII) respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008783327078
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