Specific interaction modes in the crystal structures of oligofluorinated tolanes featuring additional electron donor and acceptor groups
摘要:
A series of partially fluorinated and specifically para-substituted tolanes (1-4) have been synthesized via palladium-catalyzed Sonogashira cross-coupling reaction. The single-crystal structures have been determined by X-ray diffraction. The molecules adopt a geometry being more or less disturbed from planarity due to crystal packing effects. The packing structures are characterized by the formation of molecular stacks achieved through different modes of pi center dot center dot center dot pi interaction and being accomplished by other types of weak interactions including hydrogen bonds as well as bromo and in particular fluoro involved contacts. (C) 2011 Elsevier B.V. All rights reserved.
Specific interaction modes in the crystal structures of oligofluorinated tolanes featuring additional electron donor and acceptor groups
摘要:
A series of partially fluorinated and specifically para-substituted tolanes (1-4) have been synthesized via palladium-catalyzed Sonogashira cross-coupling reaction. The single-crystal structures have been determined by X-ray diffraction. The molecules adopt a geometry being more or less disturbed from planarity due to crystal packing effects. The packing structures are characterized by the formation of molecular stacks achieved through different modes of pi center dot center dot center dot pi interaction and being accomplished by other types of weak interactions including hydrogen bonds as well as bromo and in particular fluoro involved contacts. (C) 2011 Elsevier B.V. All rights reserved.
A convenient synthesis of fluoro-aromatic acetylene derivatives
作者:Zhang Yadong、Wen Jianxun
DOI:10.1016/s0022-1139(00)82405-7
日期:1990.5
The coupling reaction between polyfluoroiodobenzenes and terminal acetylenes under the catalysis of bis(triphenylphosphine)palladium dichloride and copper(I) iodide in triethylamine afforded a simple and effective method for the synthesis of fluoro-aromatic acetylene derivatives.
Synthesis of substituted polyfluoro-aromatic acetylenes
作者:Yadong Zhang、Jianxun Wen
DOI:10.1016/s0022-1139(00)80347-4
日期:1991.5
Reaction of pentafluoro-aromatic acetylene compounds with large excesses of nucleophilic agents using K2CO3 as base gave polysubstituted and monosubstituted polyfluoro-aromatic acetylenes.
以K 2 CO 3为碱,使五氟-芳族乙炔化合物与大量过量的亲核试剂反应,得到多取代和单取代的多氟-芳族乙炔。