Jump to main content
Jump to site search

Issue 9, 1993
Previous Article Next Article

A novel type of twisted antiparallel double-chain structure with stacking between the two strands. Structure, synthesis and magnetic properties of [{[Cu3L2(dien)(H2O)2]·3H2O}][L = 1H-1,2,4-triazole-3,5-dicarboxylate(3–), dien = 3-Azapentane-1,5-diamine]

Abstract

The synthesis and structure of a completely new type of copper(II) polymer [{[Cu3L2(dien)(H2O)2]·3H2O}], where L = 1H-1,2,4-triazole-3,5-dicarboxylate(3–) and dien = diethylenetriamine (1,4,7-triazaheptane), is reported. The compound crystallizes in the tetragonal space group P[4 with combining macron]21c, with a=b= 15.845(3), c= 22.743(1)Å and Z= 8. Least-squares refinement of 818 reflections with I > 2σ(I) and 174 parameters gave R= 0.0694, R′= 0.0969. The polymer is essentially a double chain, the building blocks of which are trinuclear copper(II) entities arranged zigzag clockwise and anticlockwise parallel to each other. The copper–copper distances within the trinuclear unit are Cu(1)ċ Cu(2) 5.937(4), Cu(1)ċ Cu(3) 4.014(6) and Cu(2)⋯ Cu(3) 5.937(4)Å. The two strands of the chain are linked to each other by apical Cu–O bonds with Cu(2)⋯ Cu(2′) 3.498(6)Å. The magnetic susceptibility data (5.8–284 K) are interpreted on the basis of an exchange Hamiltonian function giving J1[Cu(1)–Cu(3)]=–30.0 cm–1, J2[Cu(2)–Cu(2′)]=–1.5 cm–1 and g= 2.0. The nature and the strength of the antiferromagnetic exchange are discussed on the basis of the structural features, and compared with previously reported magneto-structural data for related copper(II) compounds with N1,N2- and N1,N4-linked 1,2,4-triazole ligands.

Back to tab navigation

Article information


J. Chem. Soc., Dalton Trans., 1993, 1371-1375
Article type
Paper

A novel type of twisted antiparallel double-chain structure with stacking between the two strands. Structure, synthesis and magnetic properties of [{[Cu3L2(dien)(H2O)2]·3H2O}][L = 1H-1,2,4-triazole-3,5-dicarboxylate(3–), dien = 3-Azapentane-1,5-diamine]

P. J. van Koningsbruggen, J. W. van Hal, E. Müller, R. A. G. de Graaff, J. G. Haasnoot and J. Reedijk, J. Chem. Soc., Dalton Trans., 1993, 1371
DOI: 10.1039/DT9930001371

Search articles by author

Spotlight

Advertisements