1. A. K. Abdul-Sada, A. M. Greenway, P. B. Hitchcock, T. J. Mohammed, K. R. Seddon, J. A. Zora, Upon the structure of room temperature halogenoaluminate ionic liquids. J. Chem. Soc., Chem. Commun. 1986, 1753. NR 3 – bis-alkylation R = H, (C 12 H 25 ) 2 H, [(CH 2 ) 3 CCH] 2 H, [(CH 2 ) 2 CH(CH 3 ) 2 ] 2 tris-alkylation, two dierent residues R = CH 3 , (C 2 H 5 ) 2 CH 3 , (C 12 H 25 ) 2 CH 2 C 6 H 5 , (C 2 H 5 ) 2