Krantz, K. E.; Weisflog, S. L.; Yang, W.; Dickie, D. A.; Frey, N. C.; Webster, C. E.; Gilliard Jr., R. J. Extremely twisted and bent pyrene-fused N-heterocyclic germylenes. Chemical Communications 2019, 55, 14954-14957.
Abstract
The first examples of pyrene-fused Janus-type N-heterocyclic germylenes (NHGe) are reported. Remarkably, the pyrene linker and the germanium containing rings are extremely twisted, with “twist angles” up to 64°. Coordination of a Lewis base modifies the twisting of pyrene to an overall bent core (141° bend angle).