Reference Label	Details
Hiraoka 1976	K. Hiraoka and P. Kebarle, J. Am. Chem. Soc. 98, 6119-6125 (1976) Stabilities and Energetics of Pentacoordinated Carbonium Ions. The Isomeric C2H7+ Ions and Some Higher Analogues: C3H9+ and C4H11+