Oxidation of the iron(II) complex with 3,5-dimethylpyrazole by air in acetonitrile and dibenzyl ether
摘要:
The reaction of the polymeric complex FeCl2(NCMe)(2) (1) with 3,5-dimethylpyrazole (Hdmpz) yields the tetrahedral complex [Fe(Hdmpz)(3)Cl]Cl (2), which is oxidized by air in acetonitrile to give [Fe(Hdmpz)(3)Cl-2](2)(mu-O) (3). The reaction of FeCl3 center dot 6H(2)O with Hdmpz also leads to complex 3. The oxidation of complex 2 in a dichloromethane solution of dibenzyl ether gives the complex (Hdmpz)FeCl2[eta(2)-N,O-(dmpz)C(O)H(Ph)] (4), which contains a coordinated tetrahedral intermediate product of condensation of Hdmpz and benzaldehyde. The structures of complexes 1-4 are discussed on the basis of X-ray crystallographic data.