Metal assisted rearrangement of 2,2′-pyridil with M(ClO4)2·6H2O (M=CoII, NiII and CuII): syntheses, characterization and crystal structures

With the aim of examining the metal-assisted rearrangement behaviors of 2,2′-pyridil (L), its reactions with M(ClO4)2·6H2O (M=CoII, NiII and CuII) were considered. X-ray diffraction analyses of the products reveal the formation of complexes containing 2,2′-pyridilate anion (L1) or picolinate anion (L2) as arrangement products of 2,2′-pyridil, induced by different metal ions. [CoIII(L1)2](ClO4)·CH3OH (1) and [NiII(L1)2]·2H2O (2) have similar mononuclear structures, and it should be noted that the CoII ion is unstable to oxidation in this process. However, [CuII(L2)2]·2H2O (3) forms a one-dimensional linear complex via Cu–O weak interactions. [Copyright &y& Elsevier]