New homogeneous and alternating Mn(II)-azido 1D systems

• Published in: Polyhedron Vol. 24; no. 4; pp. 557 - 562
• Main Authors: Abu-Youssef, Morsy A.M., Escuer, Albert, Vicente, Ramon, Mautner, Franz A., Öhrstrom, L., Goher, Mohamed A.S.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 10-03-2005
• Subjects: 1D systems; Crystal structures; Magnetochemistry; Manganese; Magnetochemistry; Crystal structures; 1D systems; Manganese
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2005.01.003

Two new examples of 1D Mn
2+/azido systems with different topologies have been characterised. Susceptibility measurements show one AF homogeneous and one alternating AF/F systems for which magnetic data were correlated with previous models.
Reaction of sodium azide with manganese(II) and 4-amino-1,2,4-triazol or 3-chloropyridine leads to the 1D systems [Mn(N
3)
2(4-amtr)
2]
n
(
1) or {[Mn(N
3)
2(3-Clpy)
2]
·
1/2(3-Clpy)}
n
(
2), respectively. Compound
1 crystallises in the
C2/
m (monoclinic) group and consists of chains of Mn(II) cations bridged by double μ
1,3-azido bridges in trans arrangement. Compound
2 crystallises in the
I2/
a (monoclinic) group and in this case the 1D system shows alternating double μ
1,1 and μ
1,3 bridges. Magnetic properties follow the expected antiferromagnetic (compound
1) and alternating ferro-antiferromagnetic (compound
2) behaviour.