engleski

Thermal analysis of N-carbamoyl benzotriazole derivatives

Thermal properties of N-carbamoyl benzotriazole derivatives and N, N’, N’’-tribenzyloxyisocyanuric acid were investigated using thermogravimetric analysis and diff erential scanning calorimetry. The results revealed a diff erence between structural analogs of N-carbamoyl benzotriazole derivatives. They seem to be in agreement with the previously proposed formation of N, N’, N’’-tribenzyloxyisocyanuric acid from 1-(N-benzyloxycarbamoyl) benzotriazole, via an intermediary N-benzyloxyisocyanate acid, during heating. Substantially diff erent thermal properties were observed for structural analogues, 1-(N-methoxycarbamoyl) benzotriazole and 1-(N-ethoxycarbamoyl) benzotriazole. In contrast to N-benzyloxyisocyanate, no corresponding reactions were observed for their decomposition products, i.e., methoxyisocyanate and ethoxyisocyanate.

N-carbamoyl benzotriazole; N; N’; N’’-tribenzyloxyisocyanuric acid; thermogravimetric analysis; diff erential scanning calorimetry; ATR-FTIR

nije evidentirano