Abstract Tris-chloromethyl-phosphine oxide,(ClCH 2) 3 P [DOUBLE BOND] O (I), is obtained by chlorination of (HOCH 2) 3 P [DOUBLE BOND] O with PCl 5 or (C 6 H 5) 3 PCl 2, and also by oxidation of (CICH 2) 3 P [DOUBLE BOND] O and (ClCh 2) 2 (CH 3) P [DOUBLE BOND] O. High yields of tris-(dialkyloxyphosphonly-methyl)-phosphine oxides,[RO 2 (O) PCH 2] 2 P [DOUBLE BOND] O (II)(R [DOUBLE BOND] CH 3, C 2 H 5, iso-C 3 H 7, nC 4 H 9, 2-ethyl- ...
