The biphenylene structure can also be understood as a dimer of the reactive intermediate benzyne by heating the benzenediazonium - 2 - carboxylate zwitterion prepared from 2 - aminobenzoic acid .
The reactive intermediate benzyne in fact serves as a major synthetic route .
The biphenylene structure can also be understood as a dimer of the reactive intermediate benzyne , which in fact serves as a major synthetic route , by heating the benzenediazonium - 2 - carboxylate zwitterion prepared from 2 - aminobenzoic acid .