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Water-based reactions ligand structures

The precatalyst used in these water-based kinetic resolution reactions is the cobalt Schiff-base complex 9.40. Its structural similarity to the asymmetric epoxidation catalysts 9.38A and 9.38B is to be noted. In the actual catalytic system 9.40 is activated with small amounts of acetic acid and air to give a cobalt(III) complex where CH3C02 and H20 are additional ligands. The mechanistic details of this reaction are as yet unknown. [Pg.214]

Silica-supported iron materials catalyze oxidation reactions [152]. Fe(II) silsesqui-oxanes have been reported [153, 154]. On the complex based on the bisilanol 2a and diphenyl phosphinomethane, dppm [154], possible structural similarities with iron-zeolites where identified after loss of the diphosphane ligand by addition of water. The Fe-POSS were tested in the catalytic oxidation of benzene with N2O with little success [154]. [Pg.589]

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Ligand structures

Ligand-based

Ligands ligand structure

Structural water

Structured water

Water structuring

Water, structure

Water-based

Water-based reactions

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