Cyclic inorganic compounds. Part XII. Reaction between octachlorotetraphosphonitrile and dimethylamine

Abstract

Very slow addition of dimethylamine to octachlorotetraphosphonitrile in either at –78° gives non-geminally substituted compounds with the general formula P₄N₄Cl_n(NMe₂)_{8 –n}(n= 2–6). Increasing the rate of amine addition gives both a greater spread of product stoicheiometries and an increasing proportion of geminally substituted compounds. Isomeric forms have been separated for n= 3 (three compounds), 4 (four compounds), and 5 (two compounds) and provisional structures have been assigned on the basis of i.r. and ¹H n.m.r. spectroscopy. Evidence has been obtained for the formation of P₄N₄Cl(NMe₂)₇.