Abstract

The kinetics of ring closure of Co(EDTA)Br 2−, Co (CyDTA)(H 2O) -, Co(CyDTA)Cl − and the hydrolysis of Co(MEDTA)Cl-, Co(MEDTA)Br − and α-cis-Co(EDDA)Cl 2 − have been studied. a The remits suggest that an aqua intermediate does not occur in the ring closure reactions. Biphasic rates have been detected in the first-order reactions of the bromo complexes and this is ascribed to the presence of two isomers. One of these has been prepared and its structure is discussed. Oxidation of Co(EDDA)(H 2O) 2 by Copy 4Cl 2 + yields an isomeric mixture of Co(EDDA)(H 2O) Cl.

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