کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1309730 | 975218 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure and magnetic properties of a tetranuclear Cu4O4 open-cubane in [Cu(L)]4·4H2O with L2− = (E)-N′-(2-oxy-3-methoxybenzylidene)benzohydrazide Structure and magnetic properties of a tetranuclear Cu4O4 open-cubane in [Cu(L)]4·4H2O with L2− = (E)-N′-(2-oxy-3-methoxybenzylidene)benzohydrazide](/preview/png/1309730.png)
The in-situ formed hydrazone Schiff base ligand (E)-N′-(2-oxy-3-methoxybenzylidene)benzohydrazide (L2−) reacts with copper(II) acetate to a tetranuclear open cubane [Cu(L)]4 complex which crystallizes as two symmetry-independent (Z′ = 2) S4-symmetrical molecules in different twofold special positions with a homodromic water tetramer. The two independent (A and B) open- or pseudo-cubanes with Cu4O4 cores of 4 + 2 class (Ruiz classification) each have three different magnetic exchange pathways leading to an overall antiferromagnetic coupling with J1B = J2B = −17.2 cm−1, J1A = −36.7 cm−1, J2A = −159 cm−1, J3A = J3B = 33.5 cm−1, g = 2.40 and ρ = 0.0687. The magnetic properties have been analysed using the H = −Σi,jJij(SiSj) spin Hamiltonian.
Two symmetry-independent (A and B) open Cu4O4 cubanes of 4 + 2 class (Ruiz classification) each have three different magnetic exchange pathways leading to an overall antiferromagnetic coupling with J1B = J2B = −17.2 cm−1, J1A = −36.7 cm−1, J2A = −159 cm−1, J3A = J3B = 33.5 cm−1.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 362, Issue 10, 1 August 2009, Pages 3791–3795