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Characterisation of a pre-reactive intermediate in gas-phase mixtures of fluorine and ammonia: the rotational spectrum of the H3N…F2 complex

✍ Scribed by H.I. Bloemink; K. Hinds; J.H. Holloway; A.C. Legon

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 491 KB
Volume: 245
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)01045-b

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✦ Synopsis

A weakly bound complex of NH 3 and F 2 has been detected as a pre-reactive intermediate in mixtures of the component gases and characterised by means of its ground-state rotational spectrum. Chemical reaction of NH 3 and F 2 was precluded by using a fast-mixing nozzle in a Fourier-transform microwave spectrometer. Spectroscopic constants B o, Dj and D~r are reported for both symmetric-top isotopomers H 3 R4N...F2 and H 3 nSN...F2, and the 14N-nuclear quadrupole coupling constant is given for the former species. The complex has a geometry H3N...F-F of C3v symmetry, with r(N...F) = 2.708(7) A and the intermolecular force constant k,~ = 4.69(3) N m-i.

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