Is the change in properties indigenous to the polymer backbone, or are single, isolated, cruciforms “cut out” of B responsible for the observed electronic effects? We find that the optical, electronic and redox properties of B reside mostly in their pentameric cruciform 5 modules 3. ... Starting from the bisphosphonate 1 a Horner 6 reaction produced the distyrylbenzenes 2a–e in good to excellent yields (Scheme 1). In the second step 2a–e were coupled to terminal alkynes ...
![[2,5-dichloro-4-(diethoxyphosphorylmethyl)benzyl]phosphonic acid diethyl ester Structure](https://image.chemsrc.com/caspic/134/660870-76-8.png)
