Table 1. Four Most Common Products for Each Annealing Temperature^a.

^aEach is presented with the percentage in terms of the total number of molecules, as well as the total number of pyrene components (that is, with different weights for dimers, trimers, and tetramers according to the number of pyrene units or reactant molecules it includes). The two dimers observed at 300 °C have been grouped together as D2 due to the difficulty found in differentiating them via standard STM imaging. The third most common object at 200 °C (T1) is essentially no longer found at 300 °C, suggesting that many of them have cyclized to form the most common fused trimer T3 or other molecules. A total number of 281 molecules (formed by 769 pyrene reactants) have been analyzed for the statistics at 200 °C, whereas 329 molecules (formed by 947 pyrene reactants) have been used for the statistics at 300 °C.