Copper(I) complexes of neutral,deprotonated and protonated 4,6-dimethylpyrimidine-2 (1H)-thione |
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Authors: | Raffaele Battistuzzi Giorgio Peyronel |
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Institution: | (1) Istituto di Chimica Generale e Inorganica, University of Modena, 41100 Modena, Italy |
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Abstract: | Summary The following copper(I) complexes of 4,6-dimethylpyrimidine-2(1H)-thione (HL), its protonated cation (H2L+) and deprotonated anion (L–) have been prepared: CuL, Cu(HL)X (X = Cl, Br or I), Cu(HL)2X (X = C1 or Br), Cu2(HL)3Br2, Cu(H2L)X2 (X = Cl or Br), Cu3(HL)2LA2 (A = ClO4 or BF4 ). The i.r. spectra show that in all the HL and L– complexes and in the Cu(H2L)Br2 complex, the ligands are S, N coordinated to the metal ion, while in Cu(H2L)Cl2 only the thiocarbonylic sulphur is coordinated, probably bridging two copper(I) atoms. Thev(CuN) (288–317 cm–1 ) andv(CuS) (191–225 cm–1 ) have uniform frequency values in all the complexes. The halide ions are, in all their complexes, wholly or in part coordinated giving twov(CuX) bands which may indicate an asymmetrical Cu-X Cu halide bridging bond.Author to whom all correspondence should be directed. |
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