X-ray Structure of Fluorinated N-(2-Chloropyridin-4-yl)-N‘-phenylureas. Role of F Substitution in the Crystal Packing
作者： Antonio Abad , Consuelo Agulló , Ana C. Cuñat , Cristina Vilanova , M. Carmen Ramírez de Arellano
DOI: 10.1021/CG049581K
关键词: Crystallography 、 Substitution (logic) 、 Chemistry 、 Fluorine 、 Crystal 、 Intermolecular force 、 Ring (chemistry) 、 Hydrogen bond 、 Crystal structure 、 Regioselectivity
摘要: The X-ray crystallographic structures of nine fluorinated N-(pyridin-4-yl)-N‘-phenylureas have been determined in order to study the effect regiochemistry and degree fluorination phenyl ring on their solid-state organization. analysis data obtained suggests that, addition traditional N−H···N N−H···O strong interactions, less common weaker F-based intermolecular interactions also play an important role organization crystal structure these ureas, which show specific models packing as a function pattern fluorine substitution. Particularly relevant are short distances strongly directional C−H···F−C observed most structures.
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