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Issue 27, 2008
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An unusual 3D-topology and dominant ferromagnetic couplings in two Cu(ii)–azide coordination polymers

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Abstract

The coordination polymers [(Cu(N3)2)2Cu(N3)2(methylpyrazine)2]n1 and [Cu(4-bromopyridine)(N3)2]n2, were prepared from NaN3, Cu(NO3)2·3H2O and nitrogen-containing heterocycles. 1 contains a three- and four-connected 3D (4.102)2(42.104)-dmd-net based on tetrahedral and trigonal planar nodes, whereas 2 is a sheet-structure formed by a uninodal three-connected 82.4 2D-net with additional Br⋯Br (mean 3.903(2) Å) and Br⋯N(azide) (3.035(5) Å) contacts. Both compounds contain end-on-type azide bridges, and 2 has in addition one end-to-end bridge as well. The corresponding magnetic interactions are J1,2 = +14.9(6) cm−1 for the end-on azido interactions in 1 with an additional −1.7 cm−1 coupling through the pyrazine, and J1 = 36(6) cm−1 for the end-on azido interactions and J2 = 2.5(1) cm−1 for the orthogonal end-to-end azido interactions found in 2.

Graphical abstract: An unusual 3D-topology and dominant ferromagnetic couplings in two Cu(ii)–azide coordination polymers

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Publication details

The article was received on 10 Jan 2008, accepted on 10 Apr 2008 and first published on 16 May 2008


Article type: Paper
DOI: 10.1039/B800022K
Dalton Trans., 2008, 3553-3558

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    An unusual 3D-topology and dominant ferromagnetic couplings in two Cu(II)–azide coordination polymers

    M. A. M. Abu-Youssef, A. Escuer, F. A. Mautner and L. Öhrström, Dalton Trans., 2008, 3553
    DOI: 10.1039/B800022K

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