1,3,2λ5σ5-Dioxaphospholanes have been obtained from trifluoromethylphosphonous aciddiethyl ester, the corresponding bis(diethyldiamide), (Z)-1,2,3,3,3-pentafluoropropenyl-phosphonous acid diethyl ester and hexafluoroacetone. (Z)-1,2,3,3,3-Pentafluoropropenylphosphonousacid bis(diethylamide) furnished, unexpectedly, 2-bis(diethylamino)-2,3-difluoro-4,5,5-tris(trifluoromethyl)-1,2λ5σ5-oxaphospholene-(3)
1,3,2λ 5 σ 5 -Dioxaphospholanes已从获得trifluoromethylphosphonous aciddiethyl酯,相应的双(diethyldiamide),(Ž)-1,2,3,3,3-pentafluoropropenyl-
亚膦酸二
乙酯和
六氟丙酮。(Z)-
1,2,3,3,3-五氟丙烯基
膦酸双(二乙酰胺)意外地提供了2-双(二乙
氨基)-2,3-二
氟-4,5,5-三(三
氟甲基)-1,2λ 5 σ 5 -oxaphospholene-(3)。通过单晶X射线研究证实了两个含有CF 3基团的二氧杂膦酮的结构,并显示出扭曲的三角双锥体,CF 3占据了轴向位置。