Stabilisation of 2,6‐Diarylpyridinium Cation by Through‐Space Polar–π Interactions
作者:Joan Simó Padial、René de Gelder、Célia Fonseca Guerra、F. Matthias Bickelhaupt、Jasmin Mecinović
DOI:10.1002/chem.201304462
日期:2014.5.19
The through‐space polar–π interactions between pyridinium ion and the adjacent aromatic rings in 2,6‐diarylpyridines affect the pKa values. Hammett analysis illustrates that the basicity of pyridines correlates well with the sigma values of the substituents at the para position of the flanking aryl rings.
吡啶鎓离子与2,6-二芳基吡啶中的相邻芳环之间的全空间极性-π相互作用会影响p K a 值。Hammett分析表明,吡啶的碱性与 芳基侧翼对位的取代基的sigma值具有很好的相关性。