Encapsulation of non-hydrogen atoms by in,in-bis(triarylelement)-containing cyclophanes

in,in-Cyclophanes with Bridgehead Methyl Groups

Two in,in-cyclophanes that contain methyl groups in their central cavities have been synthesized, and their X-ray structures have been determined. One of these molecules contains a very short nonbonded contact between a hydrogen atom and a methyl group, and the other is the first example of a macrobicyclic compound that contains two inwardly directed methyl groups.