Hydrazinium thiocyanate N2H5SCN

Figure 2.3a shows the TG-DTA curves of N2H5SCN. The TG of hydrazinium thiocyanate shows no weight loss up to 125 °C. After this temperature it decomposes with a break at 350 °C (weight loss of about 70%). The... 

On heating solid N2H5SCN at 100 °C for 9 h at atmospheric pressure, the peaks due to N—N stretching disappear and peaks between 1000 and 800 cm due to the CS group of thiosemicarbazide are observed (2.6). It is known that hydrazinium thiocyanate rearranges to thiosemicarbazide similar to the classical rearrangement of ammonium cyanate to urea [8] ... 

The conversion yield of hydrazinium thiocyanate into thiosemicarba-zide is about 40% when the isomerization is carried out in solution. It is well known that the conversion yield of N2H5SCN into thiosemicarbazide is 74.8% in the solid state. However, when it is heated isothermally the conversion into thiosemicarbazide is almost 100%. The IR spectrum of the converted sample is superimposable with that of a commercial thiosemicarbazide sample (Figure 2.2b and c). 

In another method, metal powders free from an oxide film are added directly to a solution of N2H5SCN in hydrazine hydrate. Owing to the high acidic nature of hydrazinium thiocyanate formed in situ, the metal powders dissolve instantaneously with the liberation of hydrogen gas, forming metal isothiocyanate hydrazines ... 

---