1D and 2D Fe II Azide Coordination Polymers with Ferromagnetic Canting

The two compounds [Fe II (pyridine) 2 (N 3 ) 2 (H 2 O)] ( 1 ) and [Fe II (4‐acetylpyridine) 2 (N 3 ) 2 ] ( 2 ) were prepared. The X‐ray crystal structures show end‐to‐end (EE) bridging azides in both cases with a 1D Fe–NNN–Fe chain for 1 and a 2D Fe–NNN–Fe net in 2 . Both compounds show similar magn...

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Published in:European journal of inorganic chemistry 2008-01, Vol.2008 (1), p.112-118
Main Authors: Abu‐Youssef, Morsy A. M., Langer, Vratislav, Luneau, Dominique, Shams, Eman, Goher, Mohamed A. S., Öhrström, Lars
Format: Article
Language:English
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Summary:The two compounds [Fe II (pyridine) 2 (N 3 ) 2 (H 2 O)] ( 1 ) and [Fe II (4‐acetylpyridine) 2 (N 3 ) 2 ] ( 2 ) were prepared. The X‐ray crystal structures show end‐to‐end (EE) bridging azides in both cases with a 1D Fe–NNN–Fe chain for 1 and a 2D Fe–NNN–Fe net in 2 . Both compounds show similar magnetic behaviour where the high‐temperature data are consistent with antiferromagnetic couplings and the low‐temperature data indicate ferrimagnetic ordering based on spin canting at 20 and 45 K. Compound 2 also shows a hysteresis loop. These findings are compared to the related 3D coordination polymer [Fe(N 3 ) 2 (4,4′‐bipyridine)]. According to network analyses the latter compound was shown to contain the new uninodal six‐connected‐network topology (5 10   ·  6 4   ·  7)‐ jsm . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.200700646