Difuryl(supermesityl)borane: a versatile building block for extended π-conjugated materials.

Direct functionalization and Pd-catalyzed cross-coupling of difuryl(supermesityl)borane (1) led to highly emissive organoborane compounds 3 and 4. Photophysical and TD-DFT studies reveal an increase of the HOMO levels with higher hetarene content and stabilization of the HOMO and LUMO levels through B-doping, leading to very robust, air-stable electron-accepting materials.

Cyclolinear Oligo- and Poly(iminoborane)s: The Missing Link in Inorganic Main-Group Macromolecular Chemistry.

The reaction of n-C H B[N(Me)SiMe ] (1) with n-C H BCl (2 a) yielded, instead of a linear poly(iminoborane), the aminoborane n-C H B(Cl)N(Me)SiMe (4) and after cyclotrimerization the borazine cyclo-(n-C H BNMe) (6). Side reactions that result in borazine formation were effectively suppressed if 1,3-bis(trimethylsilyl)-1,3,2-diazaborolidines 7 were employed as co-monomers in combination with dichloro- or dibromoboranes 2 or 8, respectively. Silicon/boron exchange polycondensation led to oligo(iminoborane)s 11 a,b,ac,d.