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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 )

1997; Royal Society of Chemistry; Issue: 2 Linguagem: Inglês

10.1039/a604692d

2050-5671

Ramón Vicente, Albert Escuer, Joan Ferretjans, H. Stoeckli‐Evans, Xavier Soláns, Mercè Font‐Bardía,

Lanthanide and Transition Metal Complexes

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.