2.3- Butanedione, macrocyclic ligands from

The synthesis of the manganese(III) complex of the hexaaza macrocyclic ligand (176), derived from 2,3-butanedione and diethylenetriamine, and its use as a catalyst for the epoxidation of olefins using iodosylbenzene as oxidant has been reported." ... 

The complex rm f-[Fe(LLH)2(py)a], with LL = diphenylgjyoximate, reacts with carbon monoxide in chlorobenzene solution. The determined rate law, the positive activation entropy, and the variation of the rate constant where the py ligands are replaced by their p-methyl or m-chloro-derivatives, are all consistent with a limiting 5n1 D) mechanism for these reactions as for those of the [Fe(CN)6L] complexes discussed in the previous paragraph. Preparative and equilibrium studies have been made of the complex [Fe(tim)(NCMe)2] +, where tim is the quadridentate macrocyclic ligand (36) derived from 1,3-diaminopropane and 2,3-butanedione. These studies suggest that kinetic studies of reactions of this complex could provide information on novel substitution reactions of iron(n), for example the (reversible) replacement of the acetonitrile ligand by carbon monoxide. ... 

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