Large binding constant differences between aromatic and aliphatic substrates in positively charged cavities indicative of higher order electric effects
Aliphaticsubstrates show, in comparison to aromaticsubstrates of similar shape, up to 60 times lower bindingconstants with a cyclophane bearing +N charges on the inside of the cavity; much smaller differences are observed with the same cyclophane bearing no charges in the vicinity of the substrate.