FIXATION OF CARBON-DIOXIDE WITH 1,2-EPOXYPROPANE CATALYZED BY TETRA-T-BUTYLPHTHALOCYANINATOALUMINIUM(III) ACETATE, TETRA-T-BUTYLPHTHALOCYANINATOALUMINIUM(III) TRIMETHYLSILANOLATE AND TETRA-T-BUTYLPHTHALOCYANINATOALUMINIUM(III) TRIPHENYLSILANOLATE

The chemical fixation of carbon dioxide with 1,2-epoxypropane was cata lysed by tetra-t-butylphthalocyaninatoaluminium(II) acetate, tetra-t-b utylphthalocyaninatoaluminium (III) trimethylsilanolate and tetra-t-bu tylphthalocyaninatoaluminium (III) triphenylsilanolate in the presence of tetrabutylammonium iodide or triethyl(2-hydroxypropyl) ammonium io dide at room temperature. Propane-1,2-diol carbonate was prepared from carbon dioxide and 1,2-epoxypropane via a six-membered ring-intermedi ate. Depending on an axial ligand of the complex, the fixation proceed ed via an hexacoordinated intermediate (for the complex with chloride or hydroxide as the axial ligand) or a six-membered ring-intermediate (for the complex with acetate or silanolate). (C) 1998 Elsevier Scienc e S.A. All rights reserved.