Distinguishing and identifying hydrogens in an NH3 group by I.R. spectroscopy

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Combined low temperature isotopic dilution and polarized i.r. measurements have been performed on single crystal specimens of sulfamic acid, +H3NSO3-, containing 5% D with respect to H. The three isotropically isolated νND bands observed in these spectra at 2302.5, 2313 and 2324 cm-1 were polarized along different crystallograpkic axes, which allowed to assign them to specific hydrogen positions in the crystal and in the NH3 groups. Comparison of neutron diffraction and vibrational frequency data shows that, despite the differences in NHO hydrogen angles, of all the geometric parameters the N⋯O distance only seems to correlate with the isolated N-D stretching frequencies.

Original languageEnglish
Pages (from-to)47-50
Number of pages4
JournalJournal of Molecular Structure
Issue numberC
Publication statusPublished - Mar 1986

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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