Substituent-Dependent Formation of Organotransition-Metal Bimetallic Calix[4]arene Inclusion Complexes

Abstract

Reaction of 1,3-di-O-substituted calixarene ligands with Et2Zn gives new organotransition-metal bimetallic calix[4]arene inclusion complexes when the substituent is larger than methyl. The resulting complexes show strong interactions between the incorporated organometallic fragment and the hydrophobic cavity of the calixarene group.