English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A formation of Am(VI) carbonate complexes has been observed under ozonation of Am(III) in guanidinium carbonate solutions. New [C(NH 2 ) 3 ] 4 [AmO 2 (CO 3 ) 3 ]·2H 2 O tricarbonate complex has been isolated and studied by the X-ray analysis. The Am atom has oxygen environment as distorted hexagonal bipyramid with three CO 3  2−  ions in equatorial plane and oxygen atoms of the AmO 2  group in the apical positions. Averaged Am–O CO 3   bond length is 2.431(13) Å, the length of Am=O bond is 1.750(12) Å. In crystal hydrogen bonds between [C(NH 2 ) 3 ] +  cations, water molecules and [AmO 2 (CO 3 ) 3 ] 4−  complex anions link the fragments of structure into the three-dimensional network. To compare the peculiarities of the structure of tricarbonate complexes it was prepared [C(NH 2 ) 3 ] 4 [AnO 2 (CO 3 ) 3 ], where An = U(VI), Np(VI) and Pu(VI). In structure of [C(NH 2 ) 3 ] 4 [AnO 2 (CO 3 ) 3 ] an actinide contraction appears as a slight shortening of the bond lengths in the actinyl groups AnO 2 : 1.80 Å for U, 1.78 Å for Np 1.76 Å Pu. The An–O CO 3   bond length in the equatorial plane of hexagonal bipyramids remains almost unchanged in the series from U to Am. An analysis of the structures showed that hydrogen bonding played an important role in crystal formation.

radiochimica acta

Tricarbonate complex of hexavalent Am with guanidinium: synthesis and structural characterization of [C(NH 2 ) 3 ] 4 [AmO 2 (CO 3 ) 3 ]·2H 2 O, comparison with [C(NH 2 ) 3 ] 4 [AnO 2 (CO 3 ) 3 ] (An=U, Np, Pu)