Reduction of tetrakis(4-N-methylpyridyl)porphinecobalt(III) by hexaammineruthenium(II). [Spectral studies of effects of pH and added ions on reduction]
Journal Article
·
· Inorg. Chem.; (United States)
The reduction of tetrakis(4-N-methylpyridyl)porphinecobalt(III) (Co/sup III/TMpyP) by Ru(NH/sub 3/)/sub 6//sup 2 +/ has been studied as a function of pH and added anions. In the range 2 x 10/sup -5/ < or = (H/sup +/) < or = 0.50 M, the reactions are pH independent and the catalytic effects of chloride and thiocyanate ions are quite modest; rate constants (M/sup -1/ s/sup -1/, 25/sup 0/C) in sulfonate media containing chloride and thiocyanate are given by 1.2 x 10/sup 5/ + 3.3 x 10/sup 5/(Cl/sup -/) + 6.6 x 10/sup 5/(SCN/sup -/). 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/sub 3/)/sub 6//sup 2 +/ reduction of CoP(H/sub 2/O)(SCN)/sup 4 +/ is 10 times larger and that for CoP(H/sub 2/O)(N/sub 3/)/sup 4 +/ is 20 times smaller than that for CoP(H/sub 2/O)/sub 2//sup 5 +/ in a similar medium. (auth)
- Research Organization:
- Ithaca Coll., NY
- OSTI ID:
- 7364396
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 15:3; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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·
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Tue Nov 05 23:00:00 EST 1985
· Inorg. Chem.; (United States)
·
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Synthesis and characterization of new isomeric water-soluble porphyrins. Tetra(2-N-methylpyridyl)porphine and tetra(3-N-methylpyridyl)porphine. [Acid solvolysis of zinc porphyrin isomers]
Journal Article
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Wed Sep 01 00:00:00 EDT 1976
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·
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ALKYL RADICALS
AMMONIA
AZIDES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACIDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPLEXES
COMPLEXES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
KINETICS
METHYL RADICALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PH VALUE
PORPHYRINS
PYRIDYL RADICALS
RADICALS
REACTION KINETICS
REDUCTION
RUTHENIUM COMPLEXES
SPECTROSCOPY
THIOCYANATES
TRANSITION ELEMENT COMPLEXES
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ALKYL RADICALS
AMMONIA
AZIDES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACIDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPLEXES
COMPLEXES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
KINETICS
METHYL RADICALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PH VALUE
PORPHYRINS
PYRIDYL RADICALS
RADICALS
REACTION KINETICS
REDUCTION
RUTHENIUM COMPLEXES
SPECTROSCOPY
THIOCYANATES
TRANSITION ELEMENT COMPLEXES