25206-02-4

Upstream product

• 35578-47-3 4,4'-dibromobenzil 
• 555-16-8 4-nitrobenzaldehdye 
• 2789-89-1 1,2-bis(4-bromophenyl)acetylene 
• 5405-28-7 1,2-di(4-bromophenyl)-1,2-dibromoethane 

Downstream Products

• 186406-42-8 2-(4-Nitro-phenyl)-4,5-bis-(4-phenylethynyl-phenyl)-1H-imidazole 

Relevant academic research and scientific papers

Synthesis of new aryl and hetaryl dibromides and diiodides, the monomers for preparation of polyarylene ethynylenes

Dibromides and diiodides with quinoxaline, phenylimidazole, and hexa-or pentaphenylarylene fragments were synthesized from dihalotolans obtained from chloral. Oligoarylene ethynylenes were synthesized by the reaction of the monomers with equimolar amounts of diethynyl aromatic compounds in the presence of the Pd11 complex. Oligomers with imidazole and hexa(penta)arylbenzene cycles are soluble in amide organic solvents and their reduced viscosities do not exceed 0.09 dL g-1.