Gas-phase molecular structure of difluoro(isoselenocyanato)phosphine determined by electron diffraction
Abstract
The molecular geometry of PF2(NCSe) has been investigated in the gas phase by electron diffraction. Mean amplitudes of vibration and perpendicular amplitude-correction coefficients have been derived from previously published spectroscopic data, and used to determine the average (rα) structure. The principal parameters (rα) for PF2(NCSe) are: r(P–F) 153.0(4), r(P–N) 164.9(12), r(NC) 121.2(8), and r(CSe) 168.1(10) pm; angle P–N–C 149.0(15), F–P–N 98.8(8), and F–P–F 97.9(14)°. The overall symmetry is Cs with the pseudohalide group lying trans to the F–P–F angle bisector.