Journal of the Chemical Society, Dalton Transactions p. 1531 - 1536 (1989)
Update date:2022-09-26
Topics:
Kadish, Karl M.
Xu, Quan Yun Y.
Maiya, G, Bhaskar
Barbe, Jean-Michel
Guilard, Roger
The spectroscopic characterization and electrochemistry of SnL(X)2 is presented where L is the dianion of tetra-p-tolylporphyrin or tetra-m-tolylporphyrin and X is CIO4-, Br-, Cl-, F-, or OH-.In all cases, electroreduction leads to porphyrin ? anion radicals and dianions which were characterized in tetrahydrofuran by spectroelectrochemistry and e.s.r. spectroscopy.Dissociation of one CIO4- ion from SnL(CIO4)2 occurs before electroreduction of the complex but no dissociation is observed either before or after electroreduction of SnL(F)2 or SnL(OH)2.In contrast, one Br- ion dissociates after the first electron addition to SnL(Br)2 while one Cl- ion dissociates from SnCl(Cl)2 after the second electroreduction of this complex.
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