The first "naked" primary phosphanide anion [ArPH]
Résumé
The electronic and steric properties of the 2,6-bis(trifluoromethyl)phenyl (Arf) substituent stabilize a naked dicoordinate phosphorus anion (see scheme) in the primary phosphanide salt [K([15]crown-5)2][ArfPH], both in the solid state and in solution.