The presence of a second 1,3-diborata-2,4-diphosphoniocyclobutane-1,3-diyl in the para-position of a phenylene linker favors the diradical form over the 1,3-diborata-2,4-diphosphoniobicyclo[1.1.0]butane bond stretch isomer, as long as the two planar diradical units are coplanar with the linker. This demonstrates that two BPBP diradicals communicate through the phenyl ring.
在亚
苯基连接体的对位上存在第二个 1,3-二
硼烷-
2,4-二
磷酸二
环丁烷-1,3-二基,只要两个平面二维单元与连接体共面,二维形式就比 1,3-二
硼烷-
2,4-二
磷酸二环[1.1.0]
丁烷键伸展异构体更有利。这表明两个 BPBP 二叉单元通过
苯基环进行沟通。