R. Schoth, E. Lork, A. Kolomeitsev
Aug 31, 1997
Citations
0
Influential Citations
5
Citations
Journal
Journal of Fluorine Chemistry
Abstract
Abstract The molecular structures of 1-(4-dimethylaminopyridinium)-2-bromo-1,1,2,2-tetrafluoroethane bromide (1-Br) (triclinic, P1, a=538.80(10), b=916.6(3), c=1372.8(3) pm, α=81.56(2)°, β=81.76(2)°, γ=82.53(2)°) and 1-(4-dimethylaminopyridinium)-1,1,2,2-tetrafluoroethane bromide (2-Br) (monoclinic, Cm, a=1159.6(2), b=2780.2(6), c=577.90(10) pm, β=95.78(3)°) were determined. The two bromides crystallize with one water molecule per formula unit. In cation 1 a hypervalent ion-pairing Br−…BrCF2CF2N (320.7 pm) was observed. A radical mechanism for the interaction of 4-dimethylaminopyridine with 1,2-dibromo-tetrafluoroethane is proposed.