Ruthenium(IV) in nitric acid media
Description
Nitrosyl ruthenium nitrates undergo photolytic dissociation to yield nitric oxide and a Ru(III) intermediate which is spontaneously oxidized in nitric acid to a Ru(IV) species. The Ru(III)-Ru(IV) conversion is acid dependent and proceeds faster at high acid concentrations. The photodissociation reaction can be reversed by sparging the nitric acid solution containing Ru(IV) with NO. The Ru(IV) species obtained by photodissociation in nitric acid has been identified as Ru4(OH)124+ by the commonality of its chemical and electrochemical behavior in perchloric acid. The Ru(IV) species can be reduced in two one-electron processes to species with average oxidation numbers of 3.75 and 3.5. The Ru(IV) species can be oxidized to Ru(VIII); in addition, a species with an intermediate oxidation state with an average value of 4.38 has been observed. (author)
Additional details
Publishing Information
- Journal Title
- J. Inorg. Nucl. Chem.
- Journal Volume
- 41
- Journal Issue
- 1
- Series
- J. Inorg. Nucl. Chem.
- Journal Page Range
- 67-71
- ISSN
- 0022-1902
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 10444070
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- AQUEOUS SOLUTIONS; ELECTROLYSIS; EXPERIMENTAL DATA; GRAPHS; ISOLATED VALUES; NITRIC ACID; NITROGEN OXIDES; OXIDATION; PHOTOLYSIS; RADICALS; REDUCTION; RUTHENIUM HYDROXIDES; RUTHENIUM NITRATES; VISIBLE SPECTRA; VOLTAMETRY
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL REACTIONS; DATA; DATA FORMS; DECOMPOSITION; DISPERSIONS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; HYDROXIDES; INFORMATION; INORGANIC ACIDS; MIXTURES; NITRATES; NITROGEN COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; RUTHENIUM COMPOUNDS; SOLUTIONS; SPECTRA; TRANSITION ELEMENT COMPOUNDS