“…With the exception of 2,3,6,7-tetrabromobiphenylene (2,3,6,7-TBBene) the compounds used in this work were either obtained from commercial sources or synthesized (5,6) or isolated (7) from commercial mixtures according to published procedures. The 2,3,6,7-TBBene was obtained as a gift from Professor McOmie, University of Bristol, and it gave the expected mass spectral properties in our hands.…”