Copper Oxine Complexes: Synthesis, Spectroscopic Study and Electrochemistry of Copper (II)-Bis Naphthylazo Imidazole/Benzimidazole/Pyridine Oxine Complexes

Prithwiraj Byabartta, Somnath Sau

Abstract


Reaction of copper perchlorate hexahydrate [Cu(H2O)](OClO4) with NaaiR´ in methanol medium following ligand addition, Oxine leads to [Cu(OX)(NaaiR/)], [NaaiR/ = naphthyl-azo  imidazole /benzimidazole /pyridine = C10H4-N=N- / C3H2-NN-1-R/, (R imidazole) / C7H4-NN-1-H (Benzimidazole)/ C3H4-N-(Pyridine), abbreviated as N,N/-chelator, where N(imidazole) and N(azo) represent N and N/, respectively; R/ = H(a), Me (b), OX = 8-Hydroxy Quinoline or Oxine]. The 1H NMR spectral measurements suggest the molecular structure of bis chelated complex with the protons at the aromatic region and naphthyl protons at higher ∂ value. 13C NMR spectrum suggest the molecular skeleton. The voltammogramalso shows a small anodic peak at 0.2 V, possibly due to the Cu(I)/Cu(0) couple.


Keywords


Copper(II), Oxine, Naphthylazoimidazole, NMR, IR, ESIMS.

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References


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