3‐substituted‐ and 3,4‐disubstituted‐4,5‐dihydro‐1,2,4‐triazol‐5‐ones (seven being new compounds) were synthesized and their proton magnetic resonance spectra were measured in trifluoroacetic acid (TFA). The protonation shifts observed on comparison of the spectra run in DMSO‐d6 and TFA were attributed to an amidinium‐type resonance of the resulting cations in the acidic medium.
                                    合成了 30 个 3-取代和 3,4-二取代-4,5-二氢-
1,2,4-三唑-5-酮(7 个是新化合物),并在
三氟乙酸(TFA)中测量了它们的质子磁共振谱)。在 
DMSO-d6 和 TFA 中运行的光谱比较时观察到的质子化位移归因于酸性介质中所得阳离子的脒型共振。