title: Experimental study of the cooperativity of CH-π interactions.
abstract: A series of new torsional molecular balances was designed to study the cooperativity of CH-π interaction in the solid state and in solution. The measured interaction energies correlated better to the number of participating alkyl carbons than to the number of CH-π contacts. The methyl and ethyl groups displayed additive interaction energies. However, the branched isopropyl group displayed strong positive cooperativity with higher than predicted interaction energies.
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina , Columbia, South Carolina 29208, United States.
authors.forename: Chen
authors.initials: C
authors.lastname: Zhao
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.forename: Mark D
authors.initials: MD
authors.lastname: Smith
authors.forename: Perry J
authors.initials: PJ
authors.lastname: Pellechia
authors.forename: Ken D
authors.initials: KD
authors.lastname: Shimizu