Complexes of structural analogues of terpyridyl with iron and zinc; the x-ray crystal structure of bis[2,6-bis(benzimidazol2-yl)pyridine]iron(II) trifluoromethylsulphonate bis-ethanol solvate

Article Article scientifique Article Complexes of structural analogues of terpyridyl with iron and zinc; the x-ray crystal structure of bis[2,6-bis(benzimidazol2-yl)pyridine]iron(II) trifluoromethylsulphonate bis-ethanol solvate eng 1992 author Ruttimann Stéphane Joséph 22962 author Moreau Catherine Marie 33047 author Williams Alan Francis 25350 author Bernardinelli Gérald Hugues 24765 author Addison Anthony W. 635-646 10.1016/S0277-5387(00)83320-3 0277-5387 http://linkinghub.elsevier.com/retrieve/pii/S0277538700833203 Complexes of iron(II) and zinc(II) with a series of tridentate ligands of the type [2,6-bis(benz-X-azol-2-yl)pyridine] (X = imid, thi, ox) have been prepared. The crystal structure of [Fe(2,6-bis(benzimidazol-2-yl)pyridine)2](CF₃SO₃)₂·2C₂H₅OH shows the iron(II) to be low spin with a meridional octahedral coordination by two tridentate ligands. ⁵⁷Fe Mössbauer spectra of the complexes [FeL₂]²⁺ show strong dependence of ligand strength on the non-coordinated heteroatom, X, of the ligand: benzimidazole ligands give low spin complexes, benzoxazoles give high spin complexes and benzthiazoles show spin-crossover properties. Derivatization of the imidazole nitrogen has only a small effect on the ligand strength. The complexes [FeLX₂] (X = anion) are all high spin. Partial dissociation is observed in solvents with a strong affinity for iron(II); the iron(II) complexes show metal-to-ligand charge transfer transitions whose intensity depends strongly on the spin state of the iron. Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Polyhedron 11 6 9808de99-8f90-485a-833b-dbf3cc969a56 Article (Published version) Restricted Ruttimann_Polyhedron_199211635.pdf 1694977 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

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Complexes of structural analogues of terpyridyl with iron and zinc; the x-ray crystal structure of bis[2,6-bis(benzimidazol2-yl)pyridine]iron(II) trifluoromethylsulphonate bis-ethanol solvate	Polyhedron			1992	433	0

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Moreau, Catherine Marie