Synthesis and electrochemistry of nickel(II)porphyrins bearing external palladium(II) or platinum(II) complexes

The syntheses of nickel(II)porphyrins bearing external palladium(II) or platinum(II) complexes are described. Electrochemical studies of these compounds were performed and the data were compared with previous results concerning porphyrin dimers linked by metal ions. The X-ray structure of one compound is also described. The syntheses of nickel(II)porphyrins bearing palladium(II) or platinum(II) complexes at their periphery were performed. These new compounds were characterized by standard spectroscopic techniques and studied by electrochemistry. The electrochemical data were then compared with previously published data of porphyrin dimers linked by metal ions like palladium(II) or platinum(II). An X-ray structure of one of these species was obtained and confirmed the structure of this series of compounds.