Ambiguities in the harmonic force fields of XY _{3} molecules
Abstract
The ambiguity in the E species force field of NF _{3} discovered by Allan et al. is discussed in terms of the algebraic equations to be solved for the force constants. It is shown that the available data require the solution of at least one quadratic equation, whereas methods of resolving the ambiguity depend upon the provision of at least one more linear equation. Similar ambiguities for BF _{3}, PF _{3} and AsF _{3} are resolved by the meansquare amplitudes from electron diffraction measurements, which supply such a linear equation.
 Publication:

Journal of Molecular Spectroscopy
 Pub Date:
 May 1972
 DOI:
 10.1016/00222852(72)900951
 Bibcode:
 1972JMoSp..42..393H