Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, New Journal of Chemistry called Synthesis, theoretical conformational study and x-ray structures of 2,2′-dimethyl-4,4′-bipyrimidine and 6,6′-dimethyl-2,2′-bipyrazine, Author is Regnouf de Vains, J.-B.; Lehn, J.-M.; Ghermani, N. E.; Dusausoy, O.; Dusausoy, Y.; Papet, A.-L.; Marsura, A.; Friant, P.; Rivail, J. L., which mentions a compound: 1001-26-9, SMILESS is O=C(OCC)/C=C/OCC, Molecular C7H12O3, Application of 1001-26-9.
The synthesis of 2,2′-dimethyl-4,4′-bipyrimidine (I) and 6,6′-dimethyl-2,2′-bipyrazine is described. In these compounds the s-trans mol. conformation has been observed and could be interpreted in terms of weak C-H…N interactions. The crystal stacking in the two compounds is formed by parallel mol. planes which are 3.46 Å apart. A semi-empirical calculation shows that, irresp. of the medium, the mols. conserve this preferential conformation.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary