Zirconium tetra-t-butoxide

This method is particularly useful for the synthesis of the alkoxide and phenoxide derivatives of the earlier transition elements. The method is extremely convenient in view of the high volatility of the generated dialkylamines, which are readily removed in vacuum. One major drawback is the synthetic availability of the corresponding metal dialkylamide complex. In some cases the method represents not only the most convenient but also the only synthetic route to an alkoxide derivative. Hence, zirconium tetra-t-butoxide is formed in excellent yield from Zr(NEt2)4 and Bu OH, and the Vlv and CrIV r-butoxides are also readily obtained via this pathway (equation 11).74... 

Vapor decomposition is a powder preparation technique useful in a few cases when a vapor phase precursor exists (often an organometallic compound) which can be decomposed to the desired composition . The vapor decomposition usually takes place at elevated temperatures. Single component oxide powders of high purity can be prepared by vapor decomposition of metal alkoxides for example, Zr02 is prepared by pyrolyzing zirconium tetra-t-butoxide. ... 

Summary Condensation reactions of cyclopentadienyl silanetriols (Cp Si(OH)3) with zirconium tetra-t-butoxide yield oligomeric zirconasiloxanes. Various types of polyhedral structures can be obtained by small structural modifications of the reactants or by variation of reaction parameters. These compounds can be considered as valuable model systems for zirconasilicates. 

To a suspension of (i )-3,3 -diiodobinaphthol 197a (240 mg, 0.44 mmol) in toluene (7 ml) was added a solution of zirconium tetra-t-butoxide (135 mg, 0.37 mmol) in toluene at 25 °C. After stirring for 30 min, a mixture of propanol (179 mg, 2.9 mmol) and water (13 mg, 0.74 mmol) in toluene (7 ml) was added. After stirring for 30 min at 25 °C, the solution was cooled to 0 °C. To the mixture was added a solution of aldehyde 209 (728 mg, 3.7 mmol) in toluene (3.5 ml), followed by a solution of ( )-l-trimethylsilyloxy-l-phenoxy-l-propene (992 mg, 4.4 mmol) in toluene (3.5 ml) at 0°C. After stirring for 30 min at the same temperature, the solution was quenched with saturated aqueous NaHCOj. The layers were separated, and the aqueous phase was extracted with dichloromethane. The combined organic extracts were washed with brine and dried with sodium sulfate. The solvent was... 

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