5709-94-4Relevant academic research and scientific papers
Synthesis and transformations of phosphorus imidazolidines (1,3-diaza-2-phospholidines)
Das,Zuckerman
, p. 1028 - 1030 (2007/10/08)
Four new derivatives of the phosphorus imidazolidine ring system have been prepared by animation of dichlorophosphines with variously N,N′-disubstituted ethylenediamines. The nmr spectra of the N-CH3 substituted rings show a sharp doublet for these protons and a multiplet for the methylene bridge protons, while the N-phenyl derivatives show a sharp doublet for the methylene bridge protons at 60 and 100 MHz contrary to expectations on the basis of the pyramidal stereochemistry of phosphorus(III). These observations are interpreted in terms of the stereochemistry and dynamics of the diazaphos-pholidine heterocycles. The phosphorus imidazolidines are transformed to their boron analogs in an exothermic reaction with phenylboron dichloride with the release of dichlorophosphine, but the reaction is not reversible. Treatment of the phosphorus ring with arsenic trichloride yields a solid whose mass spectrum shows a peak at the highest mass corresponding to the ten-membered ring dimer of the known arsenic imidazolidine.
