Matrix Infrared Spectroscopic
and Theoretical of the
Difluoroamino Metal Fluoride Molecules: F<sub>2</sub>NMF (M = Cu,
Ag, Au)
- Publication date
- Publisher
Abstract
The difluoroamino coinage metal fluoride molecules F<sub>2</sub>NMF (M = Cu, Ag, Au) have been made via spontaneous reactions
of
coinage metals and NF<sub>3</sub> in solid argon and neon matrixes
during sample annealing without formation of the M(NF<sub>3</sub>)
complexes. Comparisons between the matrix infrared spectra and the
density functional frequency calculations provide strong support for
identification of the F<sub>2</sub>NMF molecules, which are found
to have doublet ground states with <i>C</i><sub>2<i>v</i></sub> or near <i>C</i><sub>2<i>v</i></sub> geometries. The F<sub>2</sub>NCuF molecule can isomerize to
the less stable FNCuF<sub>2</sub> isomer upon UV–visible irradiation,
while no similar reactions were observed for the silver and gold species.
The M–N bonds in the F<sub>2</sub>NMF molecules are stronger
than those in the FNMF<sub>2</sub> isomers with the Ag–N bond
being longest and weakest in both cases
