Rhodium and iridium complexes of N-(2′-hydroxyphenyl)pyrrole-2-aldimine: Synthesis, structure, and spectral and electrochemical properties
| Autor: | Samaresh Bhattacharya, Semanti Basu, Indrani Pal, Georgina M. Rosair, Ray J. Butcher |
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| Rok vydání: | 2005 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification Aldimine Ligand Stereochemistry chemistry.chemical_element 02 engineering and technology General Chemistry Crystal structure 021001 nanoscience & nanotechnology Rhodium Metal 03 medical and health sciences Crystallography chemistry.chemical_compound 030104 developmental biology chemistry visual_art visual_art.visual_art_medium Iridium Cyclic voltammetry 0210 nano-technology Pyrrole |
| Zdroj: | Journal of Chemical Sciences. 117:167-173 |
| ISSN: | 0973-7103 0974-3626 |
| Popis: | Reaction of N-(2′-hydroxyphenyl)pyrrole-2-aldimine (H2L) with [M(PPh3)3Cl] (M = Rh, Ir) affords complexes of type [M(PPh3)2(L)Cl]. Structures of both complexes have been determined by X-ray crystallography. In both complexes, the N-(2′-hydroxyphenyl)pyrrole-2-aldimine ligand is coordinated to the metal centre, via dissociation of the acidic protons, as a dianionic tridentate N,N,O-donor. The M(L)Cl fragment constitutes an equatorial plane with the metal at the centre and the two PPh3 ligands occupying axial positions. The complexes are diamagnetic (low-spin d6, S = 0) and show intense MLCT transitions in the visible region. Cyclic voltammetry of the [M(PPh3)2(L)Cl] complexes shows reversible M(III)-M(IV) oxidation near 0·5 V vs SCE and quasi-reversible ligand-centred oxidative response near 1·0 V vs SCE. |
| Databáze: | OpenAIRE |
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