Published July 2004 | Version v1
Journal article Metadata-only

Crystal structures of molecular adducts between uranyl nitrate and 2,2':6,2''-terpyridine or 2,2'-bipyridyl

Creators

  • 1. RAS, Inst. of Physical Chemistry, Moscow (Russian Federation)
  • 2. CEA Marcoule, DRCP/SCPS/LCAM, Bagnols-Sur-Ceze (France)

Description

Complexes of uranyl nitrate with aromatic molecular ligands: [UO2Terpy(NO3)2] and (H2Terpy)2[UO2(NO3)2(H2O)2](NO3)4 · 4H2O (Terpy = 2,2':6,2''-terpyridine), (HBipy)[UO2(NO3)3] and [(UO2)2(Bipy)2O2(NO3)2] (Bipy = 2,2'-bipyridyl) and (HPy)4[(UO2)2(NO3)4(OH2](NO3)2 (Py = pyridine) were characterized by X-ray diffraction analysis. In all these compounds, the U(VI) atom has the hexagonal bipyramidal environment. The U-O bond lengths in the UO22+ groups have close values. In the equatorial planes, the U-N bond lengths with the Bipy and Terpy ligands are identical, whereas the U-O bond lengths depend on the type of the ligand. The lengths of the equatorial bonds increase in the sequence U-N>U-Onitr>U-Ohydr>U-Operox

Abstract (Russian)

Методом рентгеноструктурного анализа определено строение комплексов уранилнитрата с ароматическими молекулярными лигандами: UO2Terpy(NO3)2] и (H2Terpy)2[UO2(NO3)2(H2O)2](NO3)4 · 4H2O (Terpy 2,2':6,2''-терпиридин), (HBipy)[UO2(NO3)3] и [(UO2)2(Bipy)2O2(NO3)2] (Bipy = 2,2'-бипиридил) и (HPy)4[(UO2)2(NO3)4(OH2](NO3)2 (Py пиридин). Во всех этих соединениях атом U(VI) имеет окружение в виде гексагональной бипирамиды. Длины связей U-O в группах UO22+ имеют близкие значения. В экваториальных плоскостях длины связей U-N в случае лигандов Bipy и Terpy идентичны, тогда как длины связей U-O зависят от типа лиганда. Длины экваториальных связей увеличиваются в последовательности U-N>U-Oнитр>U-Oгидр>U-Oперокс

Additional details

Publishing Information

Journal Title
Koordinatsionnaya Khimiya
Journal Volume
30
Journal Issue
7
Journal Page Range
p. 546-554
ISSN
0132-344X
CODEN
KOKHDC

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
37049652
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
BOND ANGLE; BOND LENGTHS; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; COORDINATION NUMBER; CRYSTAL LATTICES; HYDRATES; LATTICE PARAMETERS; MOLECULAR STRUCTURE; NITRATES; PEROXIDES; PYRIDINES; URANYL COMPLEXES
Descriptors DEC
ACTINIDE COMPLEXES; AZINES; COMPLEXES; CRYSTAL STRUCTURE; DIMENSIONS; HETEROCYCLIC COMPOUNDS; LENGTH; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; SYNTHESIS; URANIUM COMPLEXES

Optional Information

Notes
13 refs., 5 figs., 4 tabs.