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Cover Picture: Cross‐Linked Layered Structure of Magnetically Ordered [Fe(TCNE) 2 ]⋅ z CH 2 Cl 2 Determined by Rietveld Refinement of Synchrotron Powder Diffraction Data (Angew. Chem. Int. Ed. 9/2007)
Author(s) -
Her JaeHyuk,
Stephens Peter W.,
Pokhodnya Konstantin I.,
Bonner Michael,
Miller Joel S.
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200790027
Subject(s) - tetracyanoethylene , ferrimagnetism , crystallography , synchrotron , diamagnetism , magnetization , rietveld refinement , dimer , paramagnetism , materials science , cover (algebra) , ion , spin (aerodynamics) , chemistry , condensed matter physics , crystal structure , nuclear magnetic resonance , physics , magnetic field , optics , organic chemistry , quantum mechanics , mechanical engineering , engineering , thermodynamics
A layered magnet is formed from the reaction (see H‐tube apparatus; bottom) of tetracyanoethylene (TCNE; left) and [Fe(CO) 5 ] (right). The structural elucidation described by P. W. Stephens, J. S. Miller, and co‐workers in their Communication on page 1521 ff. reveals that magnetic layers of [TCNE] .− bonded to four high‐spin Fe II ions are connected by [C 4 (CN) 8 ] 2− , the diamagnetic σ dimer of [TCNE] .− , which explains the higher than expected magnetization for this ferrimagnet.