TY - JOUR
T1 - Microwave spectra and structure of HCN-BF3
T2 - An almost weakly bound complex
AU - Reeve, S. W.
AU - Burns, W. A.
AU - Lovas, F. J.
AU - Suenram, R. D.
AU - Leopold, Kenneth R
PY - 1993/12/1
Y1 - 1993/12/1
N2 - Rotational spectra of the complex HCN-BF3 have been observed using pulsed-nozzle Fourier transform microwave spectroscopy. Spectra have been observed for the 11B and 10B species with both HC14N and HC15N, and the hyperfine structure has been analyzed. The complex has the expected C3v structure, with the nitrogen end of the HCN toward the boron, but the observed BN bond length of 2.473(29) Å is notably shorter than that in the related weakly bound systems N≡N-BF3 and N≡C-C≡N-BF3. The out-of-plane distortion of the BF3 cannot be determined accurately but is probably less than 3°. We compare the structure, force constants, quadrupole coupling constants, and binding energy of the complex with those of other species formed from BF3 and a variety of nitrogen donors. Despite the rather short B-N bond length, the force constant for the intermolecular bond, as well as the boron and nitrogen nuclear quadrupole coupling constants, is comparable to those of a truly weakly bound system.
AB - Rotational spectra of the complex HCN-BF3 have been observed using pulsed-nozzle Fourier transform microwave spectroscopy. Spectra have been observed for the 11B and 10B species with both HC14N and HC15N, and the hyperfine structure has been analyzed. The complex has the expected C3v structure, with the nitrogen end of the HCN toward the boron, but the observed BN bond length of 2.473(29) Å is notably shorter than that in the related weakly bound systems N≡N-BF3 and N≡C-C≡N-BF3. The out-of-plane distortion of the BF3 cannot be determined accurately but is probably less than 3°. We compare the structure, force constants, quadrupole coupling constants, and binding energy of the complex with those of other species formed from BF3 and a variety of nitrogen donors. Despite the rather short B-N bond length, the force constant for the intermolecular bond, as well as the boron and nitrogen nuclear quadrupole coupling constants, is comparable to those of a truly weakly bound system.
UR - http://www.scopus.com/inward/record.url?scp=15844370321&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=15844370321&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:15844370321
SN - 0022-3654
VL - 97
SP - 10630
EP - 10637
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
IS - 41
ER -