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Azide‐Bridged Copper(II) and Manganese(II) Compounds with a Zwitterionic Tetrazolate Ligand: Structures and Magnetic Properties
Author(s) -
Li XiuBing,
Ma Yu,
Zhang XiuMei,
Zhang JianYong,
Gao EnQing
Publication year - 2011
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.201100662
Subject(s) - azide , chemistry , antiferromagnetism , crystallography , manganese , dimer , ligand (biochemistry) , copper , coordination polymer , stereochemistry , ferromagnetism , crystal structure , condensed matter physics , organic chemistry , receptor , biochemistry , physics
Two azide‐bridged coordination polymers, [Cu(mptz)(N 3 ) 2 ] ( 1 ) and [Mn(mptz)(N 3 ) 2 H 2 O] ( 2 ), (mptz = N ‐methyl‐4‐pyridinium tetrazolate), were synthesized and crystallographically and magnetically characterized. Compound 1 is a neutral 1D coordination polymer in which the Cu II ions, which are in a square pyramidal surrounding, are linked by double end‐on azide bridges in an alternating basal–basal and basal–apical fashion. Compound 2 exhibits a 3D Mn II –azide coordination framework with the (10,3)‐ b net topology, in which the double end‐on–azide‐bridged dimanganese units are interlinked by single end‐to‐end azide bridges. The magnetic analyses indicated that 1 behaves magnetically as a quasi‐dimer with an S = 1 ground state due to a strong ferromagnetic interaction through the basal–basal azide bridges and a very weak antiferromagnetic coupling through the basal–apical azide bridges. Compound 2 exhibits 3D antiferromagnetic behaviors with T N = 24.0 K, where the end‐to‐end and end‐on azide bridges mediate the antiferromagnetic and ferromagnetic interactions, respectively.