IRON AND PALLADIUM COMPLEXES FROM AZOBENZENES AND O-DIAMINOBENZENE

Azobenzene and substituted azobenzenes react with carbonyls of iron to give mono-, di-, and tri-iron carbonyl derivatives. The first contain the metal σ-bonded to one of the aromatic rings; the di- and probably also the triiron complexes contain the rearranged skeleton of o-semidine. Bisazoarene complexes are formed from the azoarenepalladium chlorides by reaction with disodium tetracarbonylferrate.