Effect of temperature on N-ethylcarbazole chromium tricarbonyl complex studied by two-dimensional infrared correlation spectroscopy

Temperature-dependent variation of N-ethylcarbazole chromium tricarbonyl complex by itself without the solid support has been studied by carefully examining their IR spectra with the aid of two-dimensional correlation analysis. Two obvious stages have been observed during the heating process. In the first stage, the crystalline ECzC undergoes a slow process to change into the amorphous form due to the strong interactions of the hydrogen bonding. In the second stage, ECzC gradually decomposes, which results in the formation of Cr(CO)6. The results suggest that the interaction between the organometallics and its solid support may not have direct influence to the final product generated under the thermal treatment.