Abstract A general method of the synthesis of ω-haloalkylphosphoryl compounds was developed, a series of compounds of phosphonic and phosphine oxide type were synthesized. The ability of some ω-haloalkylphosphonates to undergo intramolecular cyclization into the corresponding 1, 2-oxaphospholane and 1, 2-oxaphosphorine was investigated depending on the solvent polarity, the presence of halogen ions in the ...