Lepeltier, Marc published the artcileNew azaborine-thiophene heteroacenes, Quality Control of 52431-30-8, the publication is Chemical Communications (Cambridge, United Kingdom) (2010), 46(37), 7007-7009, database is CAplus and MEDLINE.
A new class of heteroacenes containing B, N and S elements in the 22-electron aromatic nucleus was synthesized by reaction of diaminoterthiophenes with dichlorophenylborane. Their structure was studied by x-ray crystallog. and DFT calculations UV-visible absorption /emission spectroscopy shows high rigidity and deep-blue fluorescence of these compounds
Chemical Communications (Cambridge, United Kingdom) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Quality Control of 52431-30-8.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary