Crystal structure and magnetic behaviour of a two-dimensional step-shaped cyano-bridged complex [Cu(dien)]3[Fe(CN)6]2·6H2 O (dien = diethylenetriamin)
Abstract
A bimetallic compound
[Cu(dien)]
3
[Fe(CN)
6
]
2
·
6H
2
O (dien = diethylenetriamine) has been
prepared and its crystal structure determined: space group
P2
1
/a,
a = 14.896(3),
b = 14.128(5),
c = 20.267(6) Å,
β = 96.31(3)° and Z = 4.
The structure consists of a one-dimensional chain of
{[Cu(dien)]
2
[Fe(CN)
6
]}
+
cations and binuclear
{[Cu(dien)(H
2
O)][Fe(CN)
6
]}
-
moieties bridged by one CN
-
ligand of the
[Fe(CN)
6
]
3-
anion. The chains are linked by
hydrogen bonds giving rise to a unique step-shaped two-dimensional
network. In the crystal all the copper(II) ions have a
distorted square-based-pyramidal geometry. From magnetic susceptibility
measurements the complex was found to exhibit a weak ferromagnetic
interaction between the copper(II) and iron(III)
atoms.
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