The balance between electronic and steric effects in the template-directed syntheses of [2]catenanes
作者:Marta Pérez-Alvarez、Françisco M Raymo、Stuart J Rowan、David Schiraldi、J.Fraser Stoddart、Zhen-He Wang、Andrew J.P White、David J Williams
DOI:10.1016/s0040-4020(01)00257-5
日期:2001.4
whether the ester-substituted hydroquinone rings assume either a guest or host role in 1:1 complexes with bipyridinium-based species, or lie inside or alongside the CBPQT4+ component in the[2]catenanes. Steric and electronic factors associated with the ester substituents probably account for the opposing trends in the inter-component recognition behavior.