对具有Ｒ－Ｐ（＝Ｘ）（＝Ｙ）结构的三配位五价磷化合物的结构特点、成键及光谱性质、合成方法及化学反应性能作了一描述．比较详细地讨论了以二配位磷化合物、三配位三价磷化合物以及四配位五价磷化合物为原料的合成方法，主要讨论了三配位五价磷化合物的亲电反应性以及与不饱和化合物进行的环加成反应 The structures, bonding and spectroscopic properties, synthesis methods and chemical reactivity of the trivalent coordinated pentavalent phosphorus compounds with R-P (= X) (= Y) structure were described. In this paper, the synthesis methods of the two-coordinated phosphorous compounds, the three-coordinated phosphoric compounds and the four-coordinated pentavalent phosphorous compounds are discussed in detail. The electrophilic reactivity of the three-coordinate pentavalent phosphorous compounds and Cycloaddition reaction of unsaturated compounds