Synthesis, crystal structure, and magnetic properties of a very rare double μ-1,1-Azido- and a μ-1,1-(OMe)-Bridged FeIII dimer containing a N,N,O-donor tridentate Schiff base ligand

Naiya, Subrata ; Drew, Michael G. B. ; Diaz, Carmen ; Ribas, Joan ; Ghosh, Ashutosh (2011) Synthesis, crystal structure, and magnetic properties of a very rare double μ-1,1-Azido- and a μ-1,1-(OMe)-Bridged FeIII dimer containing a N,N,O-donor tridentate Schiff base ligand European Journal of Inorganic Chemistry, 2011 (32). pp. 4993-4999. ISSN 1434-1948

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/ejic.20...

Related URL: http://dx.doi.org/10.1002/ejic.201100552

Abstract

Two new FeIII complexes, [Fe2L2 (μ-OMe) 2 (NCS) 2] (1) and [Fe2L2 (μ-N3)2 (N3)2] (2), have been synthesized using a N,N,O-donor tridentate Schiff base ligand HL {2-[(2-dimethylaminoethylimino)methyl]phenol}, the condensation product of salicylaldehyde and N,N-dimethyl-1,2-diaminoethane. The complexes were characterized by X-ray structural analyses and variable-temperature magnetic susceptibility measurements. Both crystal structures are centrosymmetric dimers containing two FeIII atoms, which are bridged in compound 1 by two methoxy anions and in compound 2 by two μ-1,1-azides. The chelating tridentate Schiff base and a terminal thiocyanato (for 1) or azido (for 2) group complete the hexacoordination of the distorted octahedral environment of each iron center. The magnetic properties of compound 1 show the presence of antiferromagnetic exchange interactions mediated by double methoxy bridges (J = –29.45 cm–1). Compound 2 shows the presence of very weak ferromagnetic exchange interactions mediated by double μ-1,1-N3 bridges (J = 1.08 cm–1).

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons, Inc.
Keywords:Iron; Schiff Bases; Magnetic Properties; N,N,O Ligand; Azido Bridges
ID Code:108310
Deposited On:13 Oct 2017 12:44
Last Modified:13 Oct 2017 12:44

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