Title

Reduction of Tetrakis(4-N-methylpyridyl)porphinecobalt(III) by Hexaammineruthenium(II)

Document Type

Article

Publication Date

3-1-1976

Abstract

The reduction of tetrakis(4-N-methylpyridyl)porphinecobalt(III) (Co TMpyP) by Ru(NH )6 has been studied as a function of pH and added anions. In the range 2 ⨯ 10 ≤ [H ] ≤ 0.50 M, the reactions are pH independent and the catalytic effects of chloride and thiocyanate ions are quite modest; rate constants (M s , 25 °C) in sulfonate media containing chloride and thiocyanate are given by 1.2 ⨯ 10 + 3.3 ⨯ 10 [Cl ] + 6.6 ⨯ 10 [SCN ]. A more pronounced influence on rate occurs when thiocyanate or azide ions are bonded directly to the cobalt site. The rate constants for the Ru(NH )6 reduction of CoP(H O)(SCN) is 10 times larger and that for CoP(H O)(N ) is 20 times smaller than that for CoP(H O) in a similar medium. © 1976, American Chemical Society. All rights reserved. III 2+ -5 + -1 -1 5 5 - 5 - 2+ 4+ 4+ 5+ 3 3 2 2 3 2 2

Publication Name

Inorganic Chemistry

Volume Number

15

First Page

643

Last Page

646

Issue Number

3

DOI

10.1021/ic50157a029

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