Effect of axially bound anions on the electroreduction of tin(IV) porphyrins in tetrahydrofuran

Karl M. Kadish; Quan Yun Y. Xu; G. Bhaskar Maiya; Jean Michel Barbe; Roger Guilard

doi:10.1039/DT9890001531

Effect of axially bound anions on the electroreduction of tin(IV) porphyrins in tetrahydrofuran

Karl M. Kadish, Quan Yun Y. Xu, G. Bhaskar Maiya, Jean Michel Barbe, Roger Guilard

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Abstract

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 ClO₄ ^-, Br^-, Cl^-, F^-, or OH^-. In all cases, electroreduction leads to porphyrin π anion radicals and dianions which were characterized in tetrahydrofuran by spectroelectrochemistry and e.s.r. spectroscopy. Dissociation of one ClO₄ ^- ion from SnL(ClO₄)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 SnL(Cl)₂ after the second electroreduction of this complex.

Original language	English (US)
Pages (from-to)	1531-1536
Number of pages	6
Journal	Journal of the Chemical Society. Dalton Transactions
Issue number	8
DOIs	https://doi.org/10.1039/DT9890001531
State	Published - 1989
Externally published	Yes

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General Chemistry

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title = "Effect of axially bound anions on the electroreduction of tin(IV) porphyrins in tetrahydrofuran",

abstract = "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 ClO4 -, Br-, Cl-, F-, or OH-. In all cases, electroreduction leads to porphyrin π anion radicals and dianions which were characterized in tetrahydrofuran by spectroelectrochemistry and e.s.r. spectroscopy. Dissociation of one ClO4 - ion from SnL(ClO4)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 SnL(Cl)2 after the second electroreduction of this complex.",

author = "Kadish, {Karl M.} and Xu, {Quan Yun Y.} and Maiya, {G. Bhaskar} and Barbe, {Jean Michel} and Roger Guilard",

year = "1989",

doi = "10.1039/DT9890001531",

language = "English (US)",

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journal = "Journal of the Chemical Society. Dalton Transactions",

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publisher = "Royal Society of Chemistry",

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T1 - Effect of axially bound anions on the electroreduction of tin(IV) porphyrins in tetrahydrofuran

AU - Kadish, Karl M.

AU - Xu, Quan Yun Y.

AU - Maiya, G. Bhaskar

AU - Barbe, Jean Michel

AU - Guilard, Roger

PY - 1989

Y1 - 1989

N2 - 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 ClO4 -, Br-, Cl-, F-, or OH-. In all cases, electroreduction leads to porphyrin π anion radicals and dianions which were characterized in tetrahydrofuran by spectroelectrochemistry and e.s.r. spectroscopy. Dissociation of one ClO4 - ion from SnL(ClO4)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 SnL(Cl)2 after the second electroreduction of this complex.

AB - 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 ClO4 -, Br-, Cl-, F-, or OH-. In all cases, electroreduction leads to porphyrin π anion radicals and dianions which were characterized in tetrahydrofuran by spectroelectrochemistry and e.s.r. spectroscopy. Dissociation of one ClO4 - ion from SnL(ClO4)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 SnL(Cl)2 after the second electroreduction of this complex.

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JF - Journal of the Chemical Society. Dalton Transactions

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Effect of axially bound anions on the electroreduction of tin(IV) porphyrins in tetrahydrofuran

Abstract

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