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Coordination Chemistry of Rh(III) Porphyrins:  Complexes with Hydrazine, Disulfide, and Diselenide Bridging Ligands

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posted on 2001-05-24, 00:00 authored by James E. Redman, Neil Feeder, Simon J. Teat, Jeremy K. M. Sanders
Rh(III) porphyrin complexes with bridging hydrazine and substituted hydrazine ligands were characterized in solution by 1H NMR spectroscopy and in the solid state by X-ray diffraction. Addition of further ligand to these species afforded 1:1 complexes in which methylhydrazine and N,N-dimethylhydrazine preferentially bound to the Rh center through the substituted nitrogen atom, as evidenced by 1H NMR chemical shifts. An alkylated Rh(III) porphyrin was isolated as a decomposition product of the reaction of N,N-dimethylhydrazine with Rh(III) porphyrin in the presence of light and oxygen. Me2Se2 and Me2S2 formed bridging and nonbridging complexes with Rh(III) porphyrin, analogous to that observed with N,N‘-dimethylhydrazine.

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