Abstract
X-ray structural analysis was previously used [i] to study the individual stereoisomers of derivatives of thiophosphabicyclodecanone with two phenyl substituents. The present paper gives the results of an x-ray structural study of the stereoisomer of 2,3-diphenyl-4-morpholinomethyl-5-ethynyl-2-thio-2-phosphabicyclo[4.4.0]decan-5-ol (I) with mp = 238-239~ [2]. Acetylenic alcohols of the phosphorinane and phosphabicyclodecane series with four-coordinate phosphorus representatives of unsaturated organophosphorus compounds are of interest from the viewpoint of conformational analysis. Moreover, they can be used to study the reactivity of new polyfunctional organophosphorus compounds and syntheses based on them. The determination of the three-dimensional structure of these compounds by IR and NMR spectroscopy often encounters serious difficulties. The use of x-ray structural analysis (XSA) to study these compounds, in addition to establishing their structure, gives a picture of the novalence intramolecular interactions, determined by the size and orientation of the exocyclic substituents. Data on the angles and bond lengths make it possible to establish correlations between the NMR spectra characteristics and the three-dimensional structures of the molecules of the compounds being considered.
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