“…We used the symmetrical precursor s ‐indacene‐1,3,5,7(2 H ,6 H )‐tetrone (INDO 4 , 1 , Figure ) to allow the formation of extended polymers . Also, an original reaction pathway, i. e. an oxidative coupling (see Figure ), has been recently observed with this molecule . We studied the adsorption of INDO 4 on silver surfaces in ultrahigh vacuum environment (UHV) using several complementary surface sensitive techniques such as room‐temperature STM, high resolution electron energy loss spectroscopy (HREELS) and X‐ray photoemission spectroscopy (XPS), in order to provide a comprehensive picture of the different mechanisms involved ,,…”