Six-nitrogen macrocyclic complexes of the dioxouranium(VI) and praseodymium(III) ions
- Institute of Chemistry and Technology of Radioelements, Padova (Italy)
- Univ. of Milano (Italy)
- Virginia Commonwealth Univ., Richmond (USA)
The Schiff-base condensation of 2,6-diacetylpyridine and 1,2-diaminobenzene in the presence of uranyl salts produced complexes of the general formula (UP{sub 2}(C{sub 30}H{sub 26}N{sub 6}))X{sub 2}, with X = ClO{sub 4}{sup {minus}}, NO{sub 3}{sup {minus}}, and CH{sub 3}COO{sup {minus}}. A related complex, (Pr(NO{sub 3}){sub 2}(CH{sub 3}OH)(C{sub 30}H{sub 26}N{sub 6}))(ClO{sub 4}){center dot}0.5CH{sub 3}OH{center dot}0.5H{sub 2}O, was obtained from a similar metal-templated reaction followed by partial anion metathesis. The Pr(III) complex crystallized in the monoclinic space group P2{sub 1}/c with Z = 4 in a cell having a = 20.198 (3) {angstrom}, b = 14.208 (2) {angstrom}, c = 12.727 (2) {angstrom}, and {beta} = 104.25 (4){degree}. In this complex the Pr(III) ion was 11-coordinated, being linked to the six nitrogen atoms of an 18-membered macrocyclic ligand, to two bidentate nitrates situated on opposite sides of the macrocycle, and to one molecule of methanol. A noncoordinated ClO{sub 4}{sup {minus}} ion balanced the cationic charge of the complex cation; clathrated water and methanol were also present. The macrocyclic cations existing in these uranyl and praseodynium(III) complexes retained their identity in solution and were moderately inert to metal release in the present of acids or bases. 15 refs., 3 figs., 5 tabs.
- OSTI ID:
- 6950381
- Journal Information:
- Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 28:18; ISSN 0020-1669; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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ACTINIDE COMPLEXES
CARBOXYLIC ACID SALTS
CHEMICAL PREPARATION
CHLORATES
CHLORINE COMPOUNDS
COMPLEXES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
IMINES
INFORMATION
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXYGEN COMPOUNDS
PRASEODYMIUM COMPLEXES
RARE EARTH COMPLEXES
SCHIFF BASES
SYNTHESIS
URANIUM COMPLEXES