Diaquacobalt(II) n-dodecane-alpha,omega -dioate (2) has been synthesized by metathesis of the corresponding potassium soap I and has been fully characterized by chemical and spectroscopic analysis. The crystal structure of 2 has been established by X-ray powder diffraction techniques combined with electron diffraction experiments, It crystallizes in a monoclinic cell [P2(1)/a; a = 9.6558(8), b = 7,4793(6), c = 19.8936(2) Angstrom, beta = 95.648(9)degrees, V = 1429.7(3) Angstrom (3); Z = 2] and consists of stacked layers of cobalt(II) ions connected by carboxylato bridges, thus forming chains that extend along the a axis. These layers are separated by alkyl chains arranged quasi-perpendicularly to the polar sheets. Structure analysis reveals a rare anti-anti conformation of the Co-OCO-Co fragments, which is thought to be responsible for the weak antiferromagnetism of the Co-II chains. The exchange coupling constant between the magnetic centres has been estimated as J = -2.08 K.

Structure and magnetism of a polycrystalline transition metal soap - Co-II[OOC(CH2)(10)COO](H2O)(2) / J. M. Rueff, N. Masciocchi, P. Rabu, A. Sironi, A. Skoulios. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - :11(2001), pp. 2843-2848.

Structure and magnetism of a polycrystalline transition metal soap - Co-II[OOC(CH2)(10)COO](H2O)(2)

A. Sironi
Penultimo
;
2001

Abstract

Diaquacobalt(II) n-dodecane-alpha,omega -dioate (2) has been synthesized by metathesis of the corresponding potassium soap I and has been fully characterized by chemical and spectroscopic analysis. The crystal structure of 2 has been established by X-ray powder diffraction techniques combined with electron diffraction experiments, It crystallizes in a monoclinic cell [P2(1)/a; a = 9.6558(8), b = 7,4793(6), c = 19.8936(2) Angstrom, beta = 95.648(9)degrees, V = 1429.7(3) Angstrom (3); Z = 2] and consists of stacked layers of cobalt(II) ions connected by carboxylato bridges, thus forming chains that extend along the a axis. These layers are separated by alkyl chains arranged quasi-perpendicularly to the polar sheets. Structure analysis reveals a rare anti-anti conformation of the Co-OCO-Co fragments, which is thought to be responsible for the weak antiferromagnetism of the Co-II chains. The exchange coupling constant between the magnetic centres has been estimated as J = -2.08 K.
carboxylate ligands cobalt layered compounds magnetic properties X-ray powder diffraction CRYSTAL-STRUCTURE PHASE-DIAGRAMS COPPER(II) COMPLEXES DECOMPOSITION MESOMORPHISM DERIVATIVES BEHAVIOR PROGRAM COBALT
Settore CHIM/03 - Chimica Generale e Inorganica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/188298
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