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Title: Structure and magnetic behavior of a new two-dimensional antiferromagnetic manganese(II)-{mu}-1,3-azido system

Abstract

In this work we present the synthesis, X-ray crystal structure determination, and magnetic behavior of the two-dimensional compound [Mn(4acpy){sub 2}(N{sub 3}){sub 2}]{sub n}, (4acpy = 4-acetylpyridine) in which the coordination mode of the azido ligand is end-to-end. The susceptibility measurements for [Mn(4acpy){sub 2}(N{sub 3}){sub 2}]{sub n} are indicative of a moderate antiferromagnetic coupling. EPR and susceptibility data are indicative of magnetic ordering below 28 K. It is relevant to note that these magnetic measurements are the first ones for the manganese-azido(end-to-end) system. From the point of view of the design of new magnetic systems, the bridging azido ligand shows two key properties: it is a good superexchange pathway (ferromagnetic systems for the end-on coordination and antiferromagnetic for end-to-end coordination) and it frequently leads to nontrivial systems with nuclearity greater than 2. At the present, magnetic studies on the manganese-azido-bridged systems have been performed only for the dinuclear compound ({mu}-1,1-N{sub 3})[Mn(terpy)]{sub 2}{center_dot}H{sub 2}O, which shows ferromagnetic coupling (J/k = + 3.5 K), following the general trends found for analogous Cu(II) and Ni(II) 1,1-azido systems. The structure of the title compound shows that each manganese atom is octahedrally coordinated to four azido ligands and two molecules of 4-acetylpyridine in trans arrangement. Antiferromagneticmore » interactions were evident from susceptibility data.« less

Authors:
;  [1];  [2]
  1. Universitat de Barcelona (Spain)
  2. Technische Universitaet Graz (Austria) [and others
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
457095
Resource Type:
Journal Article
Journal Name:
Inorganic Chemistry
Additional Journal Information:
Journal Volume: 34; Journal Issue: 23; Other Information: PBD: 8 Nov 1995
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; MAGNESIUM COMPLEXES; CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; CHEMICAL PREPARATION; ANTIFERROMAGNETIC MATERIALS; MOLECULAR STRUCTURE

Citation Formats

Escuer, A., Vicente, R., and Mautner, F.A. Structure and magnetic behavior of a new two-dimensional antiferromagnetic manganese(II)-{mu}-1,3-azido system. United States: N. p., 1995. Web. doi:10.1021/ic00127a004.
Escuer, A., Vicente, R., & Mautner, F.A. Structure and magnetic behavior of a new two-dimensional antiferromagnetic manganese(II)-{mu}-1,3-azido system. United States. doi:10.1021/ic00127a004.
Escuer, A., Vicente, R., and Mautner, F.A. Wed . "Structure and magnetic behavior of a new two-dimensional antiferromagnetic manganese(II)-{mu}-1,3-azido system". United States. doi:10.1021/ic00127a004.
@article{osti_457095,
title = {Structure and magnetic behavior of a new two-dimensional antiferromagnetic manganese(II)-{mu}-1,3-azido system},
author = {Escuer, A. and Vicente, R. and Mautner, F.A.},
abstractNote = {In this work we present the synthesis, X-ray crystal structure determination, and magnetic behavior of the two-dimensional compound [Mn(4acpy){sub 2}(N{sub 3}){sub 2}]{sub n}, (4acpy = 4-acetylpyridine) in which the coordination mode of the azido ligand is end-to-end. The susceptibility measurements for [Mn(4acpy){sub 2}(N{sub 3}){sub 2}]{sub n} are indicative of a moderate antiferromagnetic coupling. EPR and susceptibility data are indicative of magnetic ordering below 28 K. It is relevant to note that these magnetic measurements are the first ones for the manganese-azido(end-to-end) system. From the point of view of the design of new magnetic systems, the bridging azido ligand shows two key properties: it is a good superexchange pathway (ferromagnetic systems for the end-on coordination and antiferromagnetic for end-to-end coordination) and it frequently leads to nontrivial systems with nuclearity greater than 2. At the present, magnetic studies on the manganese-azido-bridged systems have been performed only for the dinuclear compound ({mu}-1,1-N{sub 3})[Mn(terpy)]{sub 2}{center_dot}H{sub 2}O, which shows ferromagnetic coupling (J/k = + 3.5 K), following the general trends found for analogous Cu(II) and Ni(II) 1,1-azido systems. The structure of the title compound shows that each manganese atom is octahedrally coordinated to four azido ligands and two molecules of 4-acetylpyridine in trans arrangement. Antiferromagnetic interactions were evident from susceptibility data.},
doi = {10.1021/ic00127a004},
journal = {Inorganic Chemistry},
number = 23,
volume = 34,
place = {United States},
year = {1995},
month = {11}
}