Arylazo derivatives of some fluorinated β-diketones and their metal complexes

Phenylazo and benzothiazolylazo derivatives of trifluoroacetylacetone and hexafluoroacetylacetone have been synthesized and characterized. Analytical and spectral data revealed the existence of phenylazo derivatives in the intramolecularly hydrogen-bonded ketohydrazone form while the benzothiazolylazo derivatives in the azo-enol form. The monobasic bidentate coordination of the phenylazo derivatives and monobasic tridentate coordination of the benzothiazolylazo derivatives in their Ni(II), Cu(II), Zn(II) and Pd(II) complexes have been established by analytical and spectral data.