SCHEDULED MAINTENANCE
Structurally alternating copper(II) chains from oxalate and
azide bridging ligands: syntheses and crystal structure of
[Cu2(µ-ox)
(deen)2(H2O)2
(ClO4)2] and
[{Cu2(µ-N3)(µ-ox)(deen)
2}n][ClO4]
n
(deen = Et2NCH2CH2NH2
)
Abstract
The µ-oxalato dinuclear compound
[Cu
2
(µ-ox)(deen)
2
(H
2
O)
2
(ClO
4
)
2
] 1 and the derived alternating
µ-oxalato-µ-azido chain
[{Cu
2
(µ-N
3
)(µ-ox)(deen)
2
}
n
][ClO
4
]
n
2, where
deen = N,N-diethylethane-1,2-diamine, have
been synthesized and characterised. The crystal structures of 1
and 2 have been determined by single-crystal X-ray analysis. Their
magnetic behaviour has been recorded between 300 and 4 K, showing strong
antiferromagnetic coupling in each case. The data were fitted by the
expression for a dinuclear copper(II) compound giving the
parameters J = -300(3) cm
-1
,
g = 2.15(1) for 1 and
J = -287(1) cm
-1
,
g = 2.28(1) for 2.
(deen)
2
(H
2
O)
2
(ClO
4
)
2
] 1 and the derived alternating
µ-oxalato-µ-azido chain
[{Cu
2
(µ-N
3
)(µ-ox)(deen)
2
}
n
][ClO
4
]
n
2, where
deen = N,N-diethylethane-1,2-diamine, have
been synthesized and characterised. The crystal structures of 1
and 2 have been determined by single-crystal X-ray analysis. Their
magnetic behaviour has been recorded between 300 and 4 K, showing strong
antiferromagnetic coupling in each case. The data were fitted by the
expression for a dinuclear copper(II) compound giving the
parameters J = -300(3) cm
-1
,
g = 2.15(1) for 1 and
J = -287(1) cm
-1
,
g = 2.28(1) for 2.
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(deen)2(H2O)2
(ClO4)2] and
[{Cu2(µ-N3)