title: Spectral and physico-chemical investigations of novel homo-dinuclear di-micro2-alkoxo bridged Schiff base complexes: 57Fe Mössbauer parameters of the Fe(III) complex.
abstract: Spectral and molecular model computations on homo-dinuclear complexes [M(2)L(2)(H(2)O)(2)Cl(2)] [L=1-(salicylaldeneamino)-3-hydroxypropane, M=Cr(3+), Mn(3+), Fe(3+), Co(3+), Ni(3+) or Cu(3+)] are consistent with a distorted hexa-coordinate geometry. X-band EPR spectral data indicated a rhombic distortion around Cu(II) ion. Magnetic moment and (57)Fe Mössbauer data confirmed a high-spin state electronic configuration (t(2g)(3)e(g)(2), S=5/2) and asymmetric ligand environment around Fe(III) with nuclear transitions Fe(+/-3/2-->1/2) exhibiting Kramer's double degeneracy. The neighboring Fe(III) nuclei in the homo-dinuclear species are antiferromagnetically coupled.
authors.affiliation: Division of Inorganic Chemistry, Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India. zafarasiddiqi@yahoo.co.in
authors.forename: Zafar A
authors.initials: ZA
authors.lastname: Siddiqi
authors.forename: Mohd
authors.initials: M
authors.lastname: Khalid
authors.forename: Sarvendra
authors.initials: S
authors.lastname: Kumar
authors.forename: M
authors.initials: M
authors.lastname: Shahid
authors.forename: Shabana
authors.initials: S
authors.lastname: Noor
mesh_terms: D018360:Crystallography, X-Ray; D004578:Electron Spin Resonance Spectroscopy; D005290:Ferric Compounds / Q000737:chemistry* / Q000378:metabolism*; D008280:Magnetics; D008958:Models, Molecular; D015394:Molecular Structure; D012545:Schiff Bases / Q000737:chemistry* / Q000378:metabolism*; D013055:Spectrophotometry, Infrared; D015204:Spectroscopy, Mossbauer
chemical_list: D005290:Ferric Compounds; D012545:Schiff Bases