Document Type : Original Paper


1 Department of chemistry, Faculty of Science, Golestan Universtiy, Gorgan, Iran

2 Department of Chemistry, Payame Noor University, PO Box 19395-3697 Tehran, Iran

3 Institute of Physic of the Czech Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic


New dinuclear methoxo-bridged manganese(III) complex [Mn2((MeO-bph)en)2Cl2(m-CH3O)2] (1) was synthesized by template reaction of 2-hydroxy-4-methoxybenzophenone, 1,2-ethanediamine and MnCl2×6H2O with molar ration (1:1:1) in methanol as solvent. The title compound 1 was characterized by elemental analyses (CHN), Fourier Transform infrared spectroscopy (FT-IR) and single crystal X-ray diffraction. X-ray result reveal that 1 is dimeric with methoxo bridges between two symmetry equivalent manganese ions. The Mn ions are surrounded in a distorted octahedral geometry influenced by Jahn-Teller effect. The tridentate Schiff base ligand MeO-bp-en and one of the methoxo-bridges bind in the equatorial mode, whereas in the axial positions, other metoxo-bridge and Cl atom bind to the Mn ions. Thermogravimetric analysis of 1 was studied and display the title compound 1 decompose in three stages. Finally, by calcination of 1 at 500 °C for 3 h, we prepared Mn2O3 particles and characterized by FT-IR, XRD and SEM.


1.     Leelavathy L., Anbu S., Kandaswamy M., Karthikeyan N., Mohan N., Synthesis and characterization of a new series of unsymmetrical macrocyclic binuclear vanadyl(IV) complexes: Electrochemical, antimicrobial, DNA binding and cleavage studies. Polyhedron. 28: 903-910 (2009).

2.     Zhang H., Xue C., Zhang D., A Pair of Manganese(III) Schiff-Base Enantiomers: Synthesis, Crystal Structure and Magnetic Characterization. Iran. J. Chem. Chem. Eng. 35:27-33 (2016).

3.     Rayati S., Ghaemi A., Sadeghzadeh N., Electronic effects of substituents on the oxidation potentials of vanadyl complexes with tetradentate Schiff base ligands derived from 1,2-propylenediamine. Cat. Commun. 11: 792-796 (2015).

4.     Dong W.K., Zhao C.Y., Sun Y.X., Tang X.L., He X.N., Synthesis and structure of an unprecedented supramolecular bridged-hydroxyl manganese(III)-lithium(I) coordination polymer [MnIIIL(OH)2LiI]n through both intermolecular hydrogen bonds and π–π stacking interactions. Inorg. Chem. Commun. 12:234-236 (2009).

5.     Feng Y., Wang C., Zhao Y., Li J., Liao D., Yan S., Wang Q., Out-of-plane dimeric MnIII quadridentate Schiff-base complexes: Synthesis, structure and magnetic properties. Inorg. Chim. Acta. 362:3563-3568 (2009).

6.     Yang P.P., Li Z.W., Wang X.L., Li L.C., Liao D.Z., Synthesis, crystal structure and magnetic properties of a one-dimensional Mn(III) Schiff-base complex bridged by derivative of tetracyano-p-quinodimethane. Inorg. Chim. Acta. 362:3333-3337 (2009).

7.     Gildea B., Harris M.M., Gavin L.C., Murray C.A., Ortin Y., Muller-Bunz H., Harding C.J., Lan Y., Powell A.K., Morgan G.G., Substituent Effects on Spin State in a Series of Mononuclear Manganese(III) Complexes with Hexadentate Schiff-Base Ligands. Inorg. Chem. 53:6022-6033 (2014).

8.     Song J.H., Lim K.S., Yu D.W., Yoon S.W., Suh B.J., Hong C.S., Synthesis, Structures, and Magnetic Properties of End-to-End Azide-Bridged Manganese(III) Chains: Elucidation of Direct Magnetostructural Correlation. Inorg. Chem. 53:7936-7940 (2014).

9.     Yuan M., Zhao F., Zhang W., Wang Z.M., Gao S., Azide-Bridged One-Dimensional MnIII Polymers:  Effects of Side Group of Schiff Base Ligands on Structure and Magnetism.  Inorg. Chem. 46:11235-11242 (2007).

10.  20. Palatinus L, Chapuis G, SUPERFLIP – a computer program for the solution of crystal structures by charge flipping in arbitrary dimensions. J. Appl. Crystallogr. 40: 786-790 (2007).



Petricek V., Dusek M., Palatinus L., Crystallographic Computing System JANA2006: General features. Z. Kristallogr. 229:345-352 (2014).

12.  Diamond - Crystal and Molecular Structure Visualization. Crystal Impact - K. Brandenburg & H. Putz GbR, Rathausgasse 30, D-53111 Bonn.

13.  Salavati-Niasari M., Esmaeili-Zare M., Gholami-Daghian M., Synthesis and characterization of Mn2O3 nanorods using a novel manganese precursor. Adv. Powder Technol. 25:879-884 (2014).

14.  Alan I., Kriza A., Badea M., Stanica N., Co(III), Ni(II), and Cu(II) complexes of bidentate N,O-donor Schiff base ligand derived from 4-methoxy-2-nitroaniline and salicylaldehyde. J. Therm. Anal. Calorim. 111:483-490 (2013).

15.  Khalaji A.D., Nikookar M., Das D., Synthesis and characterisation of Co(II), Ni(II), Zn(II) and Cd(II) complexes with 5-bromo-N,N′-bis-(salicylidene)-o-tolidine. J. Therm. Anal. Calorim. 115:409-417 (2014).