Isobutenyl-2-furyl-, 2-thienyl-, and 2-benzo[b]thienyl-dibiphenylylenephosphoranes have been prepared from the appropriate organolithium reagent and dibiphenylylenephosphonium iodide. Their 31P and 1H n.m.r. spectra are reported and the geminal coupling constant involving a phosphorus(V) atom is discussed. The u.v. spectra are believed to show two secondary bands corresponding to apical and equatorial
异丁烯基-2-
呋喃基-,2-
噻吩基-和2-苯并[ b ]
噻吩基-二
联苯撑亚
苯基膦已由适当的
有机锂试剂和
碘化二
联苯撑phosph制备。报告了它们的31 P和1 H nmr光谱,并讨论了涉及
磷(V)原子的双键偶联常数。紫外光谱被认为显示出两个对应于顶峰和赤道
磷(V)-芳基共轭的二级谱带。