Intramolecular hydrogen-bond participation in phosphonylammonium salt formation

A series of phosphonochloridates and phosphonyl dichlorides were prepared, and their reactivity with triethylamine has been investigated using P-31 NM R spectroscopy, Taken together these studies provide evidence that an intra molecular hydrogen-bond is required for phosphonylammonium salt formation t o render the phosphorus more electron-deficient.