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A Cu II Chain Compound Showing a Ferromagnetic Coupling through Triple N 1 , N 2 ‐1,2,4‐Triazole Bridges
Author(s) -
Garcia Yann,
van Koningsbruggen Petra J.,
Bravic Georges,
Chasseau Daniel,
Kahn Olivier
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200390048
Subject(s) - chemistry , triclinic crystal system , crystallography , trifluoromethanesulfonate , ferromagnetism , copper , crystal structure , octahedron , hydrate , stereochemistry , biochemistry , physics , organic chemistry , catalysis , quantum mechanics
[Cu(hyetrz) 3 ](CF 3 SO 3 ) 2 ·H 2 O [hyetrz = 4‐(2′‐hydroxyethyl)‐1,2,4‐triazole] represents the first structurally characterised ferromagnetically coupled Cu II chain compound containing triple N 1 , N 2 ‐1,2,4‐triazole bridges. catena ‐ [μ‐Tris{4‐(2′‐hydroxyethyl)‐1,2,4‐triazole‐ N 1 , N 2 }copper( II )] bis(trifluoromethanesulfonate) hydrate (C 14 H 23 F 6 S 2 O 10 CuN 9 ) crystallises in the triclinic space group P $\bar 1$ , a = 13.54(3), b = 14.37(3), c = 15.61(4) Å, α = 95.9(1), β = 104.9(1), γ = 106.5(1)°, V = 2763(11) Å 3 , Z = 4 (Cu II units). The Cu II ions are linked by triple N 1 , N 2 ‐1,2,4‐triazole bridges yielding an alternating chain with Cu1−Cu2 = 3.8842(4) Å and Cu2−Cu3 = 3.9354(4) Å. Analysis of the magnetic data according to a high‐temperature series expansion gives a J value of +1.45(3) cm −1 . The nature and the magnitude of the ferromagnetic exchange have been discussed on the basis of the structural features. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)