Intramolecular and intermolecular bromine⋯polyfluoroarene interactions: The crystal structure of bis{κC-1-(2,3,5,6-tetrafluoropyridyl)-3-benzylimidazolin-2-ylidene}tetrabromodimercury
作者:Joseph R. Lane、Graham C. Saunders、Hayden P. Thomas
DOI:10.1016/j.jfluchem.2015.07.021
日期:2015.10
In the crystalstructure of bisκC-1-(2,3,5,6-tetrafluoro-pyridyl)-3-benzylimidazolin-2-ylidene}tetrabromodimercury each terminal bromine atom is involved in two lone pair–π interactions with tetrafluoropyridyl rings: one intramolecular, the other intermolecular. NCI index theory calculations confirm the attractive nature of these. The interactions give rise to a zigzagged chain of alternating bromine
Complex dependent regioselectivity in the nucleophilic substitution of fluorine of a coordinated tetrafluoropyridyl N-heterocycle carbene
作者:Sam R. Pachal、Graham C. Saunders、Jessica K. Weston
DOI:10.1016/j.ica.2012.09.019
日期:2013.1
The tetrafluoropyridyl substituent of the N-heterocycle carbene ligand 1-(2,3,5,6-tetrafluoropyridyl)-3-benzylimidazolin-2-ylidene has been shown to undergo nucleophilic attack when coordinated to rhodium or silver. For the complex Cp*RhCl2kappa C-(4-NC5F4)NC3H2N(CH2C6H5)} nucleophilic attack occurred at the less activated position, meta to the pyridyl ring nitrogen atom. In contrast, for the silver complex [Agkappa C-(4-NC5F4)NC3H2N(CH2C6H5)}](+) nucleophilic attack occurred ortho to the pyridyl ring nitrogen atom. (C) 2012 Elsevier Ltd. All rights reserved.