SYNTHESIS OF SOME 1-FLUOROARYL-1,3-DIKETONES, BIS(1,3-DIKETONATO)COPPER(II), BIS(1,3-DIKETONATO)DIOXOURANIUM(VI), AND THEIR ELECTROPHILIC SUBSTITUTION REACTIONS

摘要

Some l-fluoroaryl-l,3-diketones were prepared by treatment of methyl 1-fluoroaryl ketone with ethyl acetate, ethyl fluoroacetate or ethyl pentafluoropropionate in the presence of sodamide which were characterized in the form of their copper chelates. 1-Substituted-aryl-1,3-diketones (la-h) in turn on treatment with uranyl acetate afforded corresponding bis(1,3-diketonato) dioxouranium(VI) (3a-f). Bis(l,3-diketonato)dioxouranium(VI) (3a-f) when subjected to electrophilic bromination or nitration reactions yielded bis(2-bromo-1,3-diketonato)dioxouranium(VI) (4a-e) and bis(2-nitro-1,3-diketonato)dioxouranium(VI) (5a-e), respectively. The bonding mode of the ligands to the uranium ion has also been determined from IR and ~1H NMR spectral studies.