[NaFe6(OMe)12(dbm)6]Cl·12MeOH·CHCl3 (I; dbmH = dibenzoylmethane) was prepd. and characterized by elemental anal., spectral (UV, IR), x-ray crystallog., and magnetic methods. The 6 Fe atoms are located at the vertexes of an almost regular hexagon, with Fe···Fe sepns. in the range 3.18-3.20 Å and vertex angles of 119.5-120.5°. The ring serves as a host for the Na ion. Antiferromagnetic exchange coupling interactions exist between the paramagnetic Fe(III) centers (J = 20 cm-1). I is a good structural model for cyclic intermediates proposed for the polyalc.-promoted hydrolysis of Fe(III) salts.
A Cyclic Hexairon(III) Complex with an Octahedrally Coordinated Sodium Ion at the Center, an Example of the [12]Metallacrown–6 Structure Type / A., Caneschi; Cornia, Andrea; S. J., Lippard. - In: ANGEWANDTE CHEMIE. INTERNATIONAL EDITION IN ENGLISH. - ISSN 0570-0833. - STAMPA. - 34:(1995), pp. 467-469.
A Cyclic Hexairon(III) Complex with an Octahedrally Coordinated Sodium Ion at the Center, an Example of the [12]Metallacrown–6 Structure Type
CORNIA, Andrea;
1995-01-01
Abstract
[NaFe6(OMe)12(dbm)6]Cl·12MeOH·CHCl3 (I; dbmH = dibenzoylmethane) was prepd. and characterized by elemental anal., spectral (UV, IR), x-ray crystallog., and magnetic methods. The 6 Fe atoms are located at the vertexes of an almost regular hexagon, with Fe···Fe sepns. in the range 3.18-3.20 Å and vertex angles of 119.5-120.5°. The ring serves as a host for the Na ion. Antiferromagnetic exchange coupling interactions exist between the paramagnetic Fe(III) centers (J = 20 cm-1). I is a good structural model for cyclic intermediates proposed for the polyalc.-promoted hydrolysis of Fe(III) salts.
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