TY - JOUR

T1 - Nuclear Quadrupole Hyperfine Structure in the Microwave Spectrum of Ar-N2O

AU - Leung, Helen O.

AU - Gangwani, Deepa

AU - Grabow, Jens Uwe

N1 - Funding Information: Acknowledgment is made to the donors of the Petroleum Research Fund, administered by the American Chemical Society, a Cottrell College Science Award of Research Corporation, a Research Planning Grant of the National Science Foundation (CHE-9396236), and the Camille and Henry Dreyfus Faculty Start-up Grant Program for Undergraduate Institutions for support of this research.

PY - 1997/7

Y1 - 1997/7

N2 - Nuclear quadrupole hyperfine structure in the rotational spectrum of Ar-N2O has been resolved in the 7-18 GHz region using a Fourier transform microwave spectrometer. Analysis of the hyperfine lines enables not only the determination of the rotational and centrifugal distortion constants to greater precision than previous studies, but also provides values for the nuclear quadrupole coupling constants of each 14N nucleus. The coupling constants for Ar-N2O, when compared to those for free N2O, show that the electric field gradient at the terminal nitrogen nucleus in the N2O subunit is not affected by the presence of Ar, whereas that at the central nitrogen nucleus is affected slightly. This result, in contrast to recent findings in HCCH-N2O, supports the usual practice of extracting geometrical information for a van der Waals molecule from the nuclear quadrupole coupling tensor(s) of the complex.

AB - Nuclear quadrupole hyperfine structure in the rotational spectrum of Ar-N2O has been resolved in the 7-18 GHz region using a Fourier transform microwave spectrometer. Analysis of the hyperfine lines enables not only the determination of the rotational and centrifugal distortion constants to greater precision than previous studies, but also provides values for the nuclear quadrupole coupling constants of each 14N nucleus. The coupling constants for Ar-N2O, when compared to those for free N2O, show that the electric field gradient at the terminal nitrogen nucleus in the N2O subunit is not affected by the presence of Ar, whereas that at the central nitrogen nucleus is affected slightly. This result, in contrast to recent findings in HCCH-N2O, supports the usual practice of extracting geometrical information for a van der Waals molecule from the nuclear quadrupole coupling tensor(s) of the complex.

UR - http://www.scopus.com/inward/record.url?scp=0001417596&partnerID=8YFLogxK

U2 - 10.1006/jmsp.1997.7293

DO - 10.1006/jmsp.1997.7293

M3 - Article

AN - SCOPUS:0001417596

VL - 184

SP - 106

EP - 112

JO - Journal of molecular spectroscopy

JF - Journal of molecular spectroscopy

SN - 0022-2852

IS - 1

ER -