Journal of the Chemical Society, Faraday Transactions
Journal of the Chemical Society, Faraday Transactions; was published from 1990 - 1998. In 1999 it merged with a number of European chemical society physical Chemistry journals to become Physical Chemistry Chemical Physics.
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Paper
J. Chem. Soc., Faraday Trans., 1996, 92, 2671 - 2676, DOI: 10.1039/FT9969202671
Rotational spectrum and molecular properties of the dinitrogen–chlorine monofluoride complex
Stephen A. Cooke, Gina Cotti, Kelvin Hinds, John H. Holloway, A. C. Legon and David G. Lister
The ground-state rotational spectra of the three isotopomers 14N2
35ClF, 15N235ClF and 15N237ClF of a complex formed by dinitrogen and chlorine monofluoride have been observed with a pulsed-nozzle, Fourier-transform microwave spectrometer. The spectroscopic constants B0, DJ, 
aa(A)(A =14Ni, 14No or Cl) and Mbb(Cl) are reported. The complex is shown to have a linear (or nearly linear) arrangement NoNiClF of the nuclei in the equilibrium conformation with r(NiCl)= 2.920(2)Å. The intermolecular stretching force constant, k
= 5.00(5) N m–1, is implied by the centrifugal distortion constant DJ. Interpretation of the nuclear quadrupole coupling constants aa(A) leads to the oscillation angles 
av= cos–1
cos2
1/2= 17.8(5)° and 
av= cos–1cos21/2= 10(3)° for the N2 and ClF subunits, respectively. Additionally, the diffence aa(Ni)–aa(No) leads, on the basis of a simple model, to the conclusion that the polarisation of N2 attending complex formation is equivalent to the transfer of a fraction 
0.02 of an electronic charge from No to Ni. A comparison of the properties of four related complexes N2YF and OCYF, where Y = Cl or H, is presented.
