G 1200 (OTTO) Gadolinium(III) isopropoxide, 99% Cas 14532-05-9 - used in a ring opening of meso-aziridines with trimethylsilyl azide.In many asymmetric catalysis applications, glove box and Schlenk techniques should be employed to prevent exposure of the rare earth catalyst to air and moisture, which can be detrimental to the reaction outcome. Solutions of the catalyst should be made using anhydrous solvents and used shortly after preparation.