A Microwave Study of the Ammonia - Nitric Acid Complex

M. E. Ott; K. R. Leopold

doi:10.1021/jp9841891

A Microwave Study of the Ammonia - Nitric Acid Complex

M. E. Ott, K. R. Leopold

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Microwave spectra of H₃¹⁴N-H¹⁴NO₃, H₃¹⁵N-H¹⁴NO₃, H₃¹⁴N-H¹⁵NO₃, and H₃¹⁴N-D¹⁴NO₃ have been obtained by Fourier transform spectroscopy in a supersonic jet. The spectra are consistent with a hydrogen- bonded structure having a planar arrangement of the heavy atom frame and a linear or near-linear hydrogen bond involving the HNO₃ proton and the lone pair on the ammonia. The hydrogen bond length obtained from the rotational constants is 1.736(63) Å and the nitrogen-nitrogen separation is 3.344(12) Å. The NO single bond of the nitric acid and the C₃ axis of the NH₃ form angles of 54(4)° and 21(3)°, respectively, with the line joining the centers of mass of the monomers. The hydrogen bond length is significantly shorter than that observed in related complexes such as H₃N-HCI and H₃N-HBr, indicating a particularly strong interaction between ammonia and nitric acid.

Original language	English (US)
Pages (from-to)	1322-1328
Number of pages	7
Journal	Journal of Physical Chemistry A
Volume	103
Issue number	2-10
DOIs	https://doi.org/10.1021/jp9841891
State	Published - Jan 1 1999

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@article{3eb2e209c2514014a611782c432151f0,

title = "A Microwave Study of the Ammonia - Nitric Acid Complex",

abstract = "Microwave spectra of H314N-H14NO3, H315N-H14NO3, H314N-H15NO3, and H314N-D14NO3 have been obtained by Fourier transform spectroscopy in a supersonic jet. The spectra are consistent with a hydrogen- bonded structure having a planar arrangement of the heavy atom frame and a linear or near-linear hydrogen bond involving the HNO3 proton and the lone pair on the ammonia. The hydrogen bond length obtained from the rotational constants is 1.736(63) {\AA} and the nitrogen-nitrogen separation is 3.344(12) {\AA}. The NO single bond of the nitric acid and the C3 axis of the NH3 form angles of 54(4)° and 21(3)°, respectively, with the line joining the centers of mass of the monomers. The hydrogen bond length is significantly shorter than that observed in related complexes such as H3N-HCI and H3N-HBr, indicating a particularly strong interaction between ammonia and nitric acid.",

author = "Ott, {M. E.} and Leopold, {K. R.}",

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TY - JOUR

T1 - A Microwave Study of the Ammonia - Nitric Acid Complex

AU - Ott, M. E.

AU - Leopold, K. R.

PY - 1999/1/1

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N2 - Microwave spectra of H314N-H14NO3, H315N-H14NO3, H314N-H15NO3, and H314N-D14NO3 have been obtained by Fourier transform spectroscopy in a supersonic jet. The spectra are consistent with a hydrogen- bonded structure having a planar arrangement of the heavy atom frame and a linear or near-linear hydrogen bond involving the HNO3 proton and the lone pair on the ammonia. The hydrogen bond length obtained from the rotational constants is 1.736(63) Å and the nitrogen-nitrogen separation is 3.344(12) Å. The NO single bond of the nitric acid and the C3 axis of the NH3 form angles of 54(4)° and 21(3)°, respectively, with the line joining the centers of mass of the monomers. The hydrogen bond length is significantly shorter than that observed in related complexes such as H3N-HCI and H3N-HBr, indicating a particularly strong interaction between ammonia and nitric acid.

AB - Microwave spectra of H314N-H14NO3, H315N-H14NO3, H314N-H15NO3, and H314N-D14NO3 have been obtained by Fourier transform spectroscopy in a supersonic jet. The spectra are consistent with a hydrogen- bonded structure having a planar arrangement of the heavy atom frame and a linear or near-linear hydrogen bond involving the HNO3 proton and the lone pair on the ammonia. The hydrogen bond length obtained from the rotational constants is 1.736(63) Å and the nitrogen-nitrogen separation is 3.344(12) Å. The NO single bond of the nitric acid and the C3 axis of the NH3 form angles of 54(4)° and 21(3)°, respectively, with the line joining the centers of mass of the monomers. The hydrogen bond length is significantly shorter than that observed in related complexes such as H3N-HCI and H3N-HBr, indicating a particularly strong interaction between ammonia and nitric acid.

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