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  • Title: Six-coordinate nitrosyl and nitro complexes of meso-tetratolylporphyrinatocobalt with trans sulfur-donor ligands.
    Author: Kurtikyan TS, Gulyan GM, Dalaloyan AM, Kidd BE, Goodwin JA.
    Journal: Inorg Chem; 2010 Sep 06; 49(17):7793-8. PubMed ID: 20681627.
    Abstract:
    By Fourier transform infrared and optical spectroscopy, it has been observed that interactions of dimethyl sulfide and tetrahydrothiophene with nitrosyl and nitro complexes of meso-tetra-p-tolylporphyrinatocobalt [Co(TTP)] lead to the formation of previously unknown six-coordinate species. Nitrosyl complexes of the general formula (S-donor)Co(TTP)(NO) are thermally unstable and can be seen only at low temperatures both in the solid state and in solution. The nitro complexes (S-donor)Co(TTP)(NO(2)) are fairly stable at room temperature in the solid state but partly decompose upon dissolution. The binding constants for these complexation reactions were determined. In contrast to the solid-state iron nitritoporphyrin complexes, oxo-transfer reactions from the coordinated nitro group of Co(TTP)(NO(2)) to the S donors, resulting in oxidation of these sulfides and the formation of Co(TTP)(NO), were not observed.
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