Azobenzene dioxide

Azobenzene dioxide is the organic compound with the formula (C6H5N(O))2. Both cis and trans isomers are known. The cis isomer has been crystallized. It is colorless.

Reactions
When dissolved, azobenzene dioxide converts to deeply blue nitrosobenzene:
 * (C6H5N(O))2 -> 2 C6H5NO

Azobenzene dioxide is a weak base, forming coordination complexes such as [Co[(C6H5N(O))2]4](2+).