1.Phosphorus acid chlorides react with epichlorohydrin according to the scheme proposed by Kabachnik and Rossiiskaya for the interaction of phosphorus trichloride with ethylene oxide.2.It was established by a counter-synthesis method and by spectrum analysis that in the products of the addition of epichlorohydrin to phosphorus acid chlorides the ester groups have the iso-structure:$$\begin{gathered} CH_2 C1 \hfill \\ - OCH\backslash /, \hfill \\ CH_2 C1 \hfill \\ \end{gathered} $$and not the linear structure -OCH2CHC1CH2C1.3.At a bath temperature∼ 160°, tris (β,β'-dichloroisopropyl) phosphite undergoes the Arbuzov rearrangement, with the formation of the bis (β,β'-dichloroisopropyl) ester of β,γ-dichloropropylphospho