Abstract

Abstract The reactivity of some di(1-pyrazolyl)propanecopper (II) complexes with various anions in aqueous solutions has been studied. Di(1-pyrazolyl)propanecopper (II) chloride, Cu(Me2CpZ2)Cl2, reacts readily with pseudohalide ions to give complexes of the type, Cu(Me2Cpz2)Z2 (Z=SCN−, NCO−, N3 −). With PF6 − and BPh4 − anions, complexes of the type [Cu(Me2Cpz2)2X] Y (Y=PF6 −, X=Cl−, Br− and NO3 −; Y=BPh4 −, X=Cl−) are formed. However, the reaction of Cu(Me2Cpz2)Cl2 with acetylacetonate (acac), dialkyldithiocarbamate (S2CNMe2, S2CNEt2), or poly(1-pyrazolyl)borate (H2BPz2 −, HBpz3 −) anions leads to the displacement of Me2CPz2 and the subsequent formation of neutral Cu(acac)2, Cu(S2CNR2)2, Cu(H2Bpz2)2 and Cu(HBpz3)2 complexes. Reaction products have been characterised by elemental analysis, magnetic moments and infrared spectral measurements.

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