# What is the name of the glyoxal radical after removing two hydrogen atoms?

What is the name of the radical that results from removing two hydrogen atoms from glyoxal ($$\ce{CHO-CHO}$$)? It has a roughly this structure: $$\ce{O=C^.-C^.=O}$$

It is an important intermediate in heterogeneous electrocatalysis (for instance, J. Phys. Chem. Lett. 2015, 6, 11, 2032-2037). For simplicity, in most articles it is called "carbon monoxide dimer". However, it should have a systematic name like other crucial intermediates like $$\ce{-CHO}$$ (formyl) or $$\ce{-OCH3}$$ (methoxy).

Please note that the answer is probably not ethenedione, which is the hypotetic dimer of carbon monoxide in gas phase.

• It is ethenedione even if it's in excited state. – Mithoron Nov 7 '19 at 16:17