Mixed valence copper(I)–copper(II) complexes of N,S donor ligands and their 7,7′,8,8′-tetracyanoquinodimethane derivatives

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The reaction of the CuCl2·2H2O with the N,S donor ligands bis(o-aminobenzenethio)ethane, bis(o-aminoben-zenethio)propane and bis(o-aminobenzenethio)butane (abbreviated as eN2S2, pN2S2 and bN2S2, respectively) yielded mononuclear CuII complexes of stoichiometry Cu(L)Cl2 (L=eN2S2, pN2S2 or bN2S2). When the reactions were performed in the presence of 2,6-diacetylpyridine and NaClO4, binuclear mixed valence CuI–CuII complexes of stoichiometry [Cu2(L)][ClO4]3 (L=eN6S4, pN6S4 or bN6S4) were formed. Metatheses between the binuclear complexes and the lithium salt of 7,7′,8,8′-tetracyanoquinodimethane (TCNQ) yielded complexes of stoichiometry Cu2(L)(TCNQ)2 (L=eN6S4, pN6S4 or bN6S4). All of the complexes were characterised by analytical and spectroscopic techniques.

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