Intermolecular Proton Transfer in Solid Phase:  A Rare Example of Crystal-to-Crystal Transformation from Hydroxo- to Oxo-Bridged Iron(III) Molecule-Based Magnet

• Published in: Journal of the American Chemical Society Vol. 127; no. 31; pp. 10778 - 10779
• Main Authors: Armentano, Donatella, De Munno, Giovanni, Mastropietro, Teresa F, Julve, Miguel, Lloret, Francesc
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 10-08-2005
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Molecular magnets; Physics; Studies of specific magnetic materials; Iron Complexes; Antiferromagnetic resonance; Molecular magnet; Proton transfer; Magnetic hysteresis; Anionic complex; Experimental study; Oxo complex; Magnetic susceptibility; Transition elements Complexes; Hydroxo complex; Aqua complex; Dinuclear complex; Crystal-phase transformations; Magnetic properties
• ISSN: 0002-7863; 1520-5126
• DOI: 10.1021/ja051203w

Intermolecular proton transfer in solid phase from the hydroxo bridge to a water molecule occurs in a new μ-hydroxo iron(III) compound of formula {EtNH3[Fe2(ox)2Cl2(μ-OH)]·2H2O} n leading to a still crystalline compound in which the μ-oxo bridge replaces the μ-hydroxo one. Both three-dimensional compounds exhibit magnetic ordering at T c ca. 70 K due to a spin canting.