Coordination chemistry of poly(1-pyrazolyl)alkanes,part IV. Copper(II) complexes of bis- and tris-(1-pyrazolyl)methane |
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Authors: | M Adediran Mesubi F Okwudilichukwu Anumba |
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Institution: | (1) Department of Chemistry, University of Ilorin, P.M.B., 1515 Ilorin, Nigeria |
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Abstract: | Summary The reactions of some copper(II) salts with bis(1-pyrazolyl)methane, H2Cbpz, bis(3,5-dimethylpyrazolyl)methane, H2Cbdmpz, and tris(1-pyrazolyl)methane, HCtpz give the following solid complexes: CuLX2 · nH2O (L=H2Cbpz, H2Cbdmpz or HCtpz; X=Cl–, Br–, NO
3
–
, OAc–, or 1/2 SO
4
2–
and n=0, 1, 3 or 5) and CuL2X2 · nH2O (L=HCtpz, X= C–, Br–, NO
3
–
or ClO
4
–
and n=0 or 2). The complexes have been characterised by elemental analysis, visible and i.r. spectral measurements.The reactions of Cu(HCtpz)X2 · nH2O (X=Cl– or Br–) with acetylacetonate (acac–), dialkyldithiocarbamate (S2CNMe
2
–
, S2CNEt
2
–
) or poly(1-pyrazolyl)borate (H2Bbpz–, HBtpz–) in aqueous solutions lead to the displacement of HCtpz and the subsequent formation of neutral Cu(acac)2], Cu(S2CNR2)2], Cu(H2Bbpz)2] and Cu(HBtpz)2 while the reaction with oxalate ion, C2O
4
2–
yields a stable neutral solid compound, Cu(HCtpz)(C2O4)]. |
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Keywords: | |
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