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A series of aminophosphines were prepared by controlled condensation reaction between PCl 3 or PhPCl 2 and amines, and they were converted into the corresponding chalcogenides. 31 P-NMR and mass spectral data were collected for characterization of these asymmetrically substituted phosphines, and in addition, 77 Se- NMR data were collected for the phosphine selenides prepared. The spectral data revealed the importance of the dipolar structure for the heavier chalcogen atoms and the π-bond structure for the lighter ones. This study has also brought out the first examples of chiral tris(amino)phosphines and the corresponding selenides. KEY WORDS : Aminophosphines, Dichlorophenylphosphine, Chiral tris(amino)phosphines, Aminophosphine chalcogenides, 77 Se-NMR Bull. Chem. Soc. Ethiop. 2006 , 20(2), 207-218.

bulletin of the chemical society of ethiopia

&lt;b&gt;&lt;sup&gt;31&lt;/sup&gt;P-NMR, &lt;sup&gt;77&lt;/sup&gt;Se-NMR and mass spectral studies on some tricoordinate P(III)-N and tetracoordinate P(V)-N systems&lt;/b&gt;