A new mononuclear neutral high-spin iron(III) complex with the different tridentate ligands 5-bromosalicylaldehyde (pyridin-2-yl)hydrazone and 5-bromosalicylaldehyde thiosemicarbazone

Abstract

The title neutral mononuclear complex, [1-(5-bromo-2-oxidobenzylidene)thiosemicarbazidato](4-bromo-2-{[2-(pyridin-2-yl)hydrazinylidene]methyl}pheno-lato)iron(III), [Fe(C 8 H 6 BrN 3 OS)(C 12 H 9 BrN 3 O)] (I), crystallizes in the monoclinic space group C 2 /c and has two different planar tridentate ligands. The central Fe III ion is coordinated to three N, two O and one S atom, forming a distorted octahedral FeN 3 O 2 S coordination geometry. In the crystal, the complex molecules are linked by N-HÁ Á ÁO and N-HÁ Á ÁN hydrogen bonds and -interactions into layers parallel to (100). Magnetic measurements show that the central Fe III ion is in the high-spin state; this is also supported by the bond distances around the Fe III ion.