ChemInform Abstract: Six‐Nitrogen Macrocyclic Complexes of the Dioxouranium(VI) and Praseodymium(III) Ions.

Abstract

ChemInform Abstract The Schiff-base condensation of diacetylpyridine (I) and diaminobenzene (III) in the presence of the uranyl salts (II) produces the complexes (IV). The tricyclic compound (V) is also formed. The salts (IVb) cannot be completely separated from the mixture with (V). A related Pr(III) complex, the complex (VI) (space group P21/c, Z=4), is obtained in a low yield (1-5%) from a similar metal-templated reaction followed by partial anion metathesis. The structure of the Pr complex (VI) is determined by X-ray analysis. The macrocyclic cations existing in these UO2 and Pr(III) complexes retain their identity in solution and are moderately inert to metal release in the presence of acids or bases.