Bis(amino)cyclopropenium Trifluoroborates: Synthesis, Hydrolytic Stability Studies, and DFT Insights

A simple and direct two-step synthesis of bis­(amino)­cyclo­propenium trifluoro­borate (BAC–BF3) derivatives from readily available reagents is reported. Hydrolysis studies revealed these BAC–BF3 derivatives were remarkably stable toward defluorination. Notably, this first study of BAC–BF3 adduct hydrolytic stability establishes the compounds reported herein possess half-lives (t1/2) exceeding 0.23 × 106 min (∼160 days). Density functional theory (DFT) and quantum theory of atoms in molecules (QTAIM) calculations exploring the basis of this high stability are described.