Abstract：In this review the structure characteristic,bonding and spectral properties,synthetic methods and chemical reactivity of tricoordinated pentavalent phosphorus Compound with the structure [R-P(=X)(=Y)] are described.The preparation routes from dicoordinated phosphorus compounds, tricoordinated tricovalent phosphorus compounds and tetracoordinated pentavalent phosphorus compounds are discussed in details.We mainly discuss eletrophilic properties of title compounds with nucleophilic reagents and cycloaddition reaction with unsaturated compounds.
