Synthesis and structural studies of cobalt complexes of tridentate ligands incorporating azo, oxime and carboxylate functions

Abstract

335-338The tridentate ligands H2ArL ( where Ar = Ph, p-tolyl, -naphthyl) react with cobalt(II) acetate tetrahydrate, affording the dark green Et4N[CoIII(ArL)2] complex. The two quasireversible couples (in the range -0.65 to -1.20 V) in the cyclic voltammogram represent azo reduction. The X-ray structure of Et4N[Co(PhL)2] has been determined, revealing the meridional binding of the two ligands affording cis-CoN4O2 <span style="font-size:14.0pt;font-family:&quot;Times New Roman&quot;; mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">geometry.</span