Methanol → Methoxy(ethoxyethoxy)acetate alumoxane

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Pseudoboehmite (20.0 g) and methoxy(ethoxyethoxy)acetic acid (102 mL) were refluxed in water (400 mL) resulting in a clear solution after 72 h. The solution was centrifuged at 6000 rpm for 1 hour and decanted. Removal of the volatiles in vacuo (10−2 Torr) at 90° C. yielded a gel which was then dissolved in ethanol (100 mL) while stirring (10 min.) then triturated with diethyl ether (200 mL). The white solid powder thus obtained was redissolved in water (100 mL) and dried at 50° C. for 24 h resulting in a clear glassy material. The MEEA-alumoxane is soluble in water, methanol, chloroform, and methylene chloride. The alumoxane was heated from 25° C. to 225° C. at the rate of 1° C./min., soaked for 30 mins. at 225° C., followed by a temperature ramp up to 300° C. at the rate of 2° C./min., and soaked for 80 mins., with a final ramp to the maximum temperature of 1100° C. (over 360 minutes) which was then maintained for 400 minutes (FIG.

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