Issue 27, 2008

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

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

Supplementary files

Article information

Article type
Paper
Submitted
10 Jan 2008
Accepted
10 Apr 2008
First published
16 May 2008

Dalton Trans., 2008, 3553-3558

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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