Crystal Structure of Chloro[bis(5-bromo-salicylideniminephenyl)disulfide]-iron(III) Complex

2002 Analytical Sciences  
The complexes of transition metal ions with Schiff bases provide a large class of compounds of both stereochemical and magnetochemical interest due to their preparative accessibility, diversity and structural variability. 1 As part of a general study of complexes of polydentate Schiff base ligands, we became interested in ligands that contained sulfur donors. We report here the results of the reaction of iron(III) with the polydentate Schiff-base ligand formed from 5-bromo-salicylaldehyde and
more » ... 2′-diaminophenyl disulfide. The investigated compound ( Fig. 1) was synthesized according to a well-established method. 2 The structure consists of monomeric iron(III) complexes with distorted octahedral coordination (Fig. 2) . The iron(III) ion is coordinated by the two phenolic oxygens, the two imine nitrogens, one sulfur and one chlorine atom. In order to achieve this coordination, the ligands form three six membered chelate rings and one five-membered chelate ring. Two of the sixmembered rings involve phenolic oxygens and imine nitrogens; for one of these rings, the imine nitrogen (N1) is also included in the five-membered ring and the phenolic oxygen (O1) is trans to the sulfur (S1) which is involved in the five-membered ring. The third six-membered ring includes both the uncoordinated and coordinated sulfurs and the second imine nitrogen. The distance between S2 and Fe1 is 3.8907(9)Å and S2 is not considered coordinated. The Fe1 and S1 bond length is 2.6060(8)Å. In the octahedral complexes chloro[bis(salicylideniminephenyl)disulfide]iron(III) 2 and {bis[2-(2-oxido-1naphthylmethylideneamino)phenyl]disulfide}chloroiron(III), 3
doi:10.2116/analsci.18.1399 pmid:12502098 fatcat:cl7ouzstszh4tjs7imwd254dvi