Group 13 element containing conformationally rigid “N–E–N” heteroatomic bridged [3.3](2,6)pyridinophanes (E = B, Al)†
Abstract
The first examples of group 13 element containing pyridinophanes have been assembled using heteroatom N–E–N bridges (E = B, Al). The presence of B and Al as acceptor atoms in the bridges and their coordination with pyridine nitrogen has a very strong influence on the conformational rigidity of the pyridinophanes.