Struktur und Eigenschaften von Methyltrifluorphosphoran CH3PF3H

Structure and Properties of Methyltrifluorophosphorane CH₃PHF3₃ Methyldichlorophosphane reacts with three equivalents of HF under formation of Methyltrifluorophosphorane, which is characterized by mass, NMR, and vibrational spectroscopy. The ab intio calculation (HF/6‐31+G*) yields a distorted trigonal bipyramidal structure for CH₃PF₃H. The methyl group (r P—C = 180.2 pm), the hydrogen (r P—H = 137.1 pm) and one fluorine atom (r P—F_eq = 155.8 pm) are located at equatorial positions. The P—F_ax‐distance is 163.4 pm. The Lewis‐amphoteric properties are shown by reactions with CsF, [(CH₃)₄]NF and AsF₅.