Abstract
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.
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