Nitrogen-15 NMR and tracer determination of protonation site and mechanism of decomposition of aqueous hyponitrite

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00136a017· OSTI ID:6596722

Akhtar, M J; Balschi, J A; Bonner, F T

The hypronitrite anion N/sub 2/O/sub 2//sup 2 -/ shows a single /sup 15/N NMR resonance at 429 ppm, referred to NH/sub 3/. Diprotonation to form H/sub 2/N/sub 2/O/sub 2/ causes an upfield shift averaging 8 ppm per proton, compared with 24 ppm observed for monoprotonation of trioxodinitrate (N/sub 2/O/sub 3//sup 2 -/). The data suggest O-protonation of N/sub 2/O/sub 2//sup 2 -/, in contrast to N-protonation of N/sub 2/O/sub 2//sup 2 -/, and this is confirmed by isotopic and chemical evidence: the anion HN/sub 2/O/sub 2//sup -/ is shown to form N/sub 2/O without N-N bond cleavage, whereas HNO and NO/sub 2//sup -/ are the known primary products of HN/sub 2/O/sub 3//sup -/ decomposition. Despite their close similarities of rate constant, activation enthalpy, and other features, the thermal decompositions of HN/sub 2/O/sub 2//sup -/ and HN/sub 2/O/sub 3//sup -/ therefore occur via dissimilar mechanisms.

• Research Organization: State Univ. of New York at Stony Brook
• OSTI ID: 6596722
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Journal Issue: 6 Vol. 21:6; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ANIONS
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMICAL SHIFT
DATA
DECOMPOSITION
DISPERSIONS
EXPERIMENTAL DATA
INFORMATION
IONS
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
MEDIUM TEMPERATURE
MIXTURES
NITROGEN 15
NITROGEN COMPOUNDS
NITROGEN ISOTOPES
NITROGEN OXIDES
NMR SPECTRA
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
PH VALUE
SOLUTIONS
SPECTRA
STABLE ISOTOPES
TRACER TECHNIQUES