In order to ensure the validity and reproducibility of the results, the temperature optimization for the ROMP reaction was performed in triplicate (Table , entry 1-3, Table , entry 1-6), or quadruplicate (Table , entry 1-3, Table , entry 7-12). Assessment of the optimized conditions was done on the basis of reproducibility of the obtained polymer chain length and Đ. Among the temperatures screened between 60-100 ºC, 90 ºC provided the most consistent experimental Mn between quadruplicate runs and resulted in the highest average yield while maintaining a relatively low Đ. Therefore, the optimal temperature for ROMP of cyclopropene 3 was determined to be 90 ºC.