A new structural motif for rigid C2-symmetrical propeller-shaped 1,2-diamines employing double aromatic π-stackingElectronic supplementary data (ESI) available: colour figure showing π-stacking in compound 12. See http://www.rsc.org/suppdata/cc/b1/b106641b/
Abstract
Utilization of double aromatic π-stacking interactions on a 2,3-diaminobutane framework provides a new motif for structurally rigid C2-symmetrical propeller-shaped chiral 1,2-diamines.