Halogen Bonds of Halotetrafluoropyridines in Crystals and Co-crystals with Benzene and Pyridine
The structures of the three para-substituted halotetrafluoropyridines with chlorine, bromine, and iodine have been determined in the solid state (X-ray diffraction). The structures of these compounds and that of pentafluoropyridine were also determined in the gas phase (electron diffraction). Structures in the solid state of the bromine and iodine derivatives exhibit halogen bonding as a structure-determining motif. On the way to an investigation of halogen bond formation of halotetrafluoropyridines in the solid state with the stronger Lewis base pyridine, co-crystals of benzene adducts were investigated to gain an understanding of the influence of aryl–aryl interactions. These co-crystals showed halogen bonding only for the two heavier halotetrafluoropyridines. In the pyridine co-crystals halogen bonding was observed for all three para-halotetrafluoropyridines. The formation of homodimers and heterodimers with pyridine is also supported by quantum-chemical calculations of electron density topologies and natural bond orbitals.
Schwabedissen, Jan,Trapp, Pia C.,Stammler, Hans-Georg,Neumann, Beate,Lamm, Jan-Hendrik,Vishnevskiy, Yury V.,K?rte, Leif A.,Mitzel, Norbert W.
p. 7339 - 7350
(2019/05/16)
Organofluorine sulfur-containing compounds: V. Joint pyrolysis with chlorine or bromine of polyfluoroarenethioles, polyfluorohetarenethioles, and their derivatives
Joint pyrolysis with chlorine and bromine of polyfluoroarenethiols, -hetarenethiols, and their derivatives at 300-650°C furnished polyfluorocompounds containing chlorine and bromine. 2005 Pleiades Publishing, Inc.
Platonov,Maksimov,Dvornikova,Nikul'shin
p. 1647 - 1653
(2007/10/03)
Perfluorozinc aromatics by direct insertion of zinc into C-F or C-CL bonds
For the first time perfluoroaromatic organozinc compounds were obtained by direct action of zinc on C-F bonds in the presence of metal salts (SnCl2, CuCl2, ZnBr2). The reactions are accelerated by ultrasound. The scope of