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

Prithwiraj Byabartta, Somnath Sau

Abstract


Reaction of copper perchlorate hexahydrate [Cu(H 2O)](OClO4) with NaaiR´ in CH2Cl2 medium following ligand addition leads to [Cu(NaaiR/)2](OTf), NaaiR/ = naphthylazo  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)]. 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 suggests 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), Naphthylazoimidazole, NMR, IR, ESIMS.

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