Abstract
Structure, ultraviolet absorption spectrum, and stability of uranyl chelate compounds of o-, m-, and p-methoxydibenzoylmethane (I, II, and III) were examined. The structure of these chelate compounds is made up of 2 moles of the β-diketone to 1 mole of uranyl and none of these compounds possess water of crystallization. The compounds are soluble in organic solvents such as alcohols, ether, and pyridine. Absorption maximum in their ultraviolet spectrum is at 400 mμ (ε 14, 500) in (I), at 400 mμ (ε 16, 800) in (II), and at 404 mμ (ε 20, 900). The stability is in the order of (I), (III), (II) and they are more labile than the corresponding nitro compounds or dibenzoylmethanes, In other words, chelate compounds possessing electron-releasing groups as the substituent are more labile than those with electron-attracting groups.
