Reversible Tautomeric Transformation between a Bis(amino)cyclodiphosph(V)azene and a Bis(imino)cyclodiphosph(V)azane.
The tautomeric four-membered-ring P-N heterocycles 1, 2, and 3 can be interconverted; the formation of the cyclodiphosph(V)azene 1 is enthalpically and entropically favored. The crystal structures of the tautomers 1 and 3 have been determined and indications are given regarding the mechanism of the interconversion.
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J
J
Tirreé
D
D
Gudat
M
M
Nieger
E
E
Niecke
NMR spectroscopy; phosphorus; phosphorus heterocycles; tautomerism