Eloy et al.
Bulletin des Societes Chimiques Belges, 1969 , vol. 78, p. 47
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Ponzio
Gazzetta Chimica Italiana, 1932 , vol. 62, p. 1025,1029
in not given react. of 400 g PCl5 with 120 g NH4Cl in an inert solvent;; sucking off the formed mass, washing with ice-cold C6H6; fractional distn.; yield 75 g (NPCl2)3, 25 g (NPCl2)4;;