Premium
Syntheses, Structures and Magnetic Properties of Layered Metal( II ) Mandelates
Author(s) -
Beghidja Adel,
Hallynck Sylvain,
Welter Richard,
Rabu Pierre
Publication year - 2005
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400623
Subject(s) - chemistry , isostructural , monoclinic crystal system , crystallography , antiferromagnetism , ferromagnetism , crystal structure , copper , metal , hydrothermal synthesis , magnetic susceptibility , stereochemistry , hydrothermal circulation , condensed matter physics , physics , organic chemistry , seismology , geology
A series of Mn II , Fe II , Co II , Ni II and Cu II layered mandelates has been synthesised in the form of crystalline powders by a hydrothermal route. The five compounds are isostructural with the copper analogue, also obtained in a single crystal form, except that the latter shows a strong Jahn−Teller distortion of the coordination spheres around the Cu II centres. The complexes crystallise in the monoclinic centrosymmetric space group P 2 1 / a and their structures consist of layers of six‐coordinate metal( II ) ions interconnected through carboxylato bridges in a diamond‐like network. The magnetic data indicate very small antiferromagnetic in‐plane couplings for 1 , 2 , 3 and 5 , with J / k B = −0.122 K for 1 . The Ni II compound 4 exhibits ferromagnetic coupling within the layers ( J / k B = +1.213 K) and ferromagnetic 3D ordering can be observed at T C = 2.7 K. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)