作者:Enrique Díez-Barra、Sonia Merino、Prado Sánchez-Verdú、José Torres
DOI:10.1016/s0040-4020(97)00724-2
日期:1997.8
The benzylation of a set of nine ketones provides enough information to establish how the ketone structure affects the existence of a pi-pi interaction. The presence of a phenyl moiety starting from the alpha-carbon atom and flexibility in cyclic ketones are structural features required for effective interactions. The pi-pi interaction is controlled by a polar-pi effect. Stronger interaction is achieved when slight electronwithdrawing groups are present in both pi-system. This results is explained by the predominance of the sigma-pi shells attractive interaction in an edge-to-face geometry. (C) 1997 Elsevier Science Ltd.