As. Burlov et al., The nickel(II) complex with 2-(2 '-N-phenylaminonaphthylazo)-1-octylbenzimidazole: A new type of structure, RUSS J C CH, 26(9), 2000, pp. 648-651
As a result of the study of the nickel(II) complex with 2-(2'-N-phenylamino
naphthylazo)-1-octylbenzimidazole (HL) with a NiL2 composition, the authors
established that, unlike the previously suggested structure with the tetra
hedral central core, the title compound has an octahedral configuration due
to the tt identate function of the hetarylazo ligand with the formation of
the NiN6 coordination core and the closure of two five-membered metallocyc
les by each ligand.