Abstract
The monoprotonated species of 2-aminomalonyl difluoride, namely, 1,3-difluoro-1,3-dioxopropan-2-aminium dihydrogen trifluoride, [C(3)H(4)F(2)NO(2)][H(2)F(3)], was synthesized from sulfur tetrafluoride in anhydrous hydrogen fluoride (aHF) with [NH(4)][C(3)H(5)NO(4)] as the starting material. The solvent was removed and the salt was dissolved in aHF and crystallized. In the solid state, the three-dimensional network is built by medium-strong N-H...F hydrogen bonds and C...F contacts. This is the first structure determination of an aminoacyl difluoride and the second of an aminoacyl fluoride.