Crystallization of Aminium Salts and Amides of Trifluoroacetic Acid. Molecular Structure of Ethylenediamine N,N'-Bis(trifluoroacetyl)

Trifluoroacetamide CF3C(O)NH2, N,N'-bis(trifluoroacetyl)ethylenediamine CF3C(O)NHCH2CH2HN(O)CCF3, trifluoroacetyl-2-aminoethanol CF3C(O)NHCH2CH2ОН, and 1,2-bis(trifluoroacetylaminoethoxy)ethane CF3C(O)NHCH2CH2ОCH2CH2ОCH2CH2НN(O)CCF3 were synthesized by the thermal decomposition (200–250°С, Ar) of the corresponding ammonium and aminium salts, such as ammonium trifluoroacetate CF3C(O)O‒ +NH4, N,N'-ethylenediamine bis(trifluoroacetate) CF3COO‒ +NH3CH2CH2H3N+ ‒OOCCF3, 2-aminoethanol trifluoroacetate CF3COO‒ +NH3CH2CH2ОН, and 1,2-bis(aminoethoxy)ethane bis(2-trifluoroacetate) CF3COO‒ +NH3CH2CH2ОCH2CH2ОCH2CH2Н3N+ ‒OOCCF3. The synthesized compounds were characterized by elemental analysis, powder X-ay diffraction, IR and NMR spectroscopy, mass spectrometry, thermogravimetry, optical and scanning electron microscopy. The molecular structure of ethylenediamine N,N'-bis(trifluoroacetate) was determined.