Complex nitrates of rhodium(III) in aqueous solutions

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Sov. J. Coordinat. Chem.; (United States)

OSTI ID:6367346

Belyaev, A V; Venediktov, A B; Fedotov, M A; Khranenko, S P

Concentrated solutions of sodium hexanitrorhodate(III) have been studied by /sup 103/Rh, /sup 17/O, /sup 14/N, and /sup 35/Cl NMR, as well as electronic and IR spectroscopy. It has been established that in solutions not containing acids the coordinated nitro groups undergo very slow replacement with the formation of mononuclear aquo acids and polynuclear species containing bridging hydroxo ligands. In acidic media the hexanitrorhodate(III) ions are rapidly converted into complex species containing three nitro groups, among which trinitrotriaquorhodium(III) has the greatest stability. The replacement of the three remaining nitro groups takes place slowly and results in the formation of chloroaquonitro compounds. The absence of additivity of the /sup 103/Rh chemical shifts in systems of nitro compounds of rhodium(III) has been established. The interaction of sodium hexanitrorhodate(III) with hydrochloric acid results in the formation of complex species containing coordinated water in all stages of the reaction. The processes taking place are not confined to substitution reactions, since they are accompanied by redox conversions. The mechanisms of these reactions have been discussed.

• Research Organization: Institute of Inorganic Chemistry, Siberia, USSR
• OSTI ID: 6367346
• Journal Information: Sov. J. Coordinat. Chem.; (United States), Journal Name: Sov. J. Coordinat. Chem.; (United States) Vol. 12:5; ISSN SJCCD
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL SHIFT
CHLORINE 35
CHLORINE ISOTOPES
COMPLEXES
COMPLEXOMETRY
DISPERSIONS
ELECTRON SPECTRA
EVEN-ODD NUCLEI
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYPERFINE STRUCTURE
INFRARED SPECTRA
INORGANIC ACIDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KINETICS
LIGHT NUCLEI
MINUTES LIVING RADIOISOTOPES
MIXTURES
NITRATES
NITRO COMPOUNDS
NITROGEN 14
NITROGEN COMPOUNDS
NITROGEN ISOTOPES
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN 17
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PERCHLORIC ACID
RADIOISOTOPES
REACTION KINETICS
REDOX REACTIONS
RHODIUM 103
RHODIUM COMPLEXES
RHODIUM ISOTOPES
SODIUM COMPOUNDS
SOLUTIONS
SPECTRA
STABLE ISOTOPES
TRANSITION ELEMENT COMPLEXES