Isolation of a manganese complex of a tridentate azo-aromatic ligand from an unusual Mn2(CO)10 promoted simultaneous reductive azo cleavage and aromatic ring amination reactions

Abstract

The reaction of Mn2(CO)10 with pap [pap = 2-(phenylazo) pyridine, L1] in boiling n-octane affords a violet complex, [Mn(L2)2] (1, HL2 NH4C 5N=NC6H4N(H)C6H5). This reaction exemplifies an unusual transformation wherein the anionic tridentate ligand (L2)- is formed by the fusion of phenyl imide fragment, originated from the splitting of the -N=N- function of L1, to pendantphenyl ring of the coordinated azo ligand. X-ray structure of the manganese complex is reported. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.