Alkali-Metal-Ion-Centered Sandwich Structures of 4-Bromophenyl[tris(pentafluorophenyl)]borates and Their Synthetic Utility

Fluorinated tetraarylborates (FTABs) are known as one of the best partners of reactive cations and radical cations. In addition, fascinating effects of ionic substituents have recently gathered much attention from organic chemists. In view of these backgrounds, we newly designed alkali-metal 4-bromophenyl[tris(pentafluorophenyl)]borates 1[M·L] (M = Li, Na, K, Cs, MgBr; L = coordinating solvents) as synthetic units to explore reactive cations as...