Amino-, Alkoxy-, Alkyl, and Aryl Derivatives

The unstable acyldiarylphosphine oxides, although previously postulated to exist, have only now been prepared, by the reaction of secondary phosphine 

Schmidpeter, J. Luber, H. Riedl, and M. Volz, Phosphorus and Sulphur, 1977, 3, 171. 

The positions of a number of tautomeric equilibria involving phosphazenes and phosphoramidates have been investigated by H n.m.r. spectroscopy. Thus the ratio of [(54)] [(55)] is 89 11 at 28 °C in a-bromonaphthalene. Activation parameters for 

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Amino-, Alkoxy-, Alkyl, and Aryl Derivatives.— Recent developments in the synthesis and properties of phosph(ra)azenes, all of which are P-amino-derivatives, have been reviewed, unfortunately in a journal which is difficult to obtain. Interest in the phosph(iii)azenes has centred around their reactions with various acid halides, as summarized in Scheme 3. Invariably, the product is a ring compound, ranging from... 

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