Single-Crystal X-Ray Diffraction Studies in a Series of 5-Pentafluorophenyl-2,2'-bipyridines and Their Fused Analogs / M. V. Varaksin, E. S. Starnovskaya, D. S. Kopchuk [et al.] // Russian Journal of General Chemistry. – 2020. – Vol. 90, No. 2. – P. 235-237.