Benzo-1,3,2-diazaphospholide And Benzo-1,3,2-diazaphospholium: An Isoelectronic Aromatic Anion-cation Pair

摘要

Isoelectronic benzo-1,3,2-diazaphospholium cations and benzo-1.3,2-diazaphospholide anions were prepared from the same phosphazane precursor; both species display according to computational studies similar aromaticity as the neutral bonzo-1,3.2-diazaphosphole but are chemically more stable due to their ionic nature.rnHeteroanalogues of indenyls of type I and II (Scheme 1) with one or more heavier group-15 elements receive currently intensive and still growing attention. The particular appeal of these species stems from the presence of the stabilising aromatic π-electron system which makes the otherwise unstable systems isolable. This specific energy balance, which depends on the nature of the heteroatoms, is also the source of a unique reactivity.