Ytterbium isopropoxides

Brown and Mazdiyasni carried out thermogravimetric analyses of yttrium, dysprosium, and ytterbium isopropoxides and observed a 30% weight loss up to 200-250°C with the formation of an intermediate hydroxide which was converted to the oxide in the temperature range 750-850°C. 

The reactions of gadolinium, erbium, yttrium, and ytterbium isopropoxides with acids or acid anhydrides mono-, di-, and tri-carboxylates depending upon... 

More recently reported was a bridged bis(amidinate)-isopropoxy ytterbium complex 85 (Fig. 14), which displayed excellent polymerization activity in conjunction with a good control of the polymerization of L-lactide with a linear increases of polymer molecular weights (M ) with [M]o/[I]o [103]. It was also evidenced that 85 was even more active in the polymerization of lactide than its structural analog with bridging phenoxide group, as an isopropoxide is intrinsically more nucleophilic than a phenoxide. 

M Ytterbium(lll) isopropoxide in THF, 3.0 mL, 0.30 mmol highly flammable, causes burns... 

Mazdiyasni et al. (584) were successful in depositing Zr02/Hf02 by a similar route as well as the oxides of yttrium, dysprosium, and ytterbium from their isopropoxides at about 250°C under an atmosphere of nitrogen. More recently, deposition of A1203 on InP was reported (585) by the thermolysis of A1(0-/-Pr)3 and also of Ti02 and Ta205, respectively, from their ethoxides (586). 

Pyrroles. Imines and nitroalkenes undergo condensation to afford 1,3,4-trisubsti-tuted pyrroles. For the promotion of this reaction, samarium(ni) isopropoxide is better than several other Sm compounds and isopropoxides of lanthanum and ytterbium. 

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