The determination of the molecular structure of 2-fluoro-3,5-di-tert-butyl-1,3,2-oxazaphospholene by means of electron diffraction and ab initio calculations

The molecular structure of gaseous 2-fluoro-3,5-di-tert-butyl-1,3,2-oxazaphospholene has been determined by electron diffraction and ab initio calculations. The structural analysis has shown that the diheterophospholene ring possesses a P-envelope conformation with axial orientation of the P–F bond which is very long, 1.641(11) Å.