Crystal and molecular structure of bis(1,3-diphenyl-1,3-propanedionato)bis(triphenylphosphine oxide)nitratoeuropium(III)

Journal Article · Sun Jun 01 00:00:00 EDT 1986 · Sov. J. Coordinat. Chem.; (United States)

OSTI ID:6366997

Panin, E S; Karasev, V E; Steblevskaya, N I; Bukvetskii, B V

The crystal structure of the compound Eu(DBM)/sub 2/NO/sub 3/(TPPO)/sub 2/ has been determined (DAR UMB-K instrument, MO K..cap alpha.., spherical sample, heavy-atom method, least-square method in the anisotropic approximation on the basis of 2090 reflections to R = 0.106). The crystals are monoclinic: a = 28.029(4), b = 20.698(3), c = 12.964(3) A, ..gamma.. = 127.87(1)/sup 0/, d/sup (mea)/ = 1.37, d/sup (cal)/ = 1.36 g/cm/sup 3/, ..mu..(Mo K..cap alpha..) = 11.6 cm/sup -1/, Z = 4, space group B2/b. In the isolated molecular complex Eu(DMB)/sub 2/NO/sub 2/(TPPO)/sub 2/ the europium atom is located on a twofold rotational symmetry axis. The coordination polyhedron of Eu is a distorted dodecahedron. The lengths of the Eu-O(DBM), Eu-O(TPPO), and Eu-O(NO/sub 3/) bonds are equal to 2.247(9)-2.335(2), 2.312(5), and 2.549(3) A, respectively. The Eu-NO/sub 3/ chelate ring is planar. The coordination of the phosphorus atom is tetrahedral. The Eu(DMB) fragment of the complex has a slight fold along the O(1)...O(2) line (the angle equals 6.9/sup 0/). The packing of the molecules in a crystal is governed only by van der Waals interactions. It has been postulated that in adducts of europium with neutral ligands the splitting of the Stark components of Eu(III) decreases with decreasing values of the width of the coordination layer ..delta..R.

• OSTI ID: 6366997
• Journal Information: Sov. J. Coordinat. Chem.; (United States), Vol. 11:8; Other Information: Translated from Koordinatsionnaya Khimiya; 11: No.8, 1127-1131(Aug 1985)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
74 ATOMIC AND MOLECULAR PHYSICS
EUROPIUM COMPLEXES
MOLECULAR STRUCTURE
MONOCLINIC LATTICES
STRUCTURAL CHEMICAL ANALYSIS
BINDING ENERGY
BOND ANGLE
COORDINATION VALENCES
ELECTRONS
ENERGY LEVELS
EUROPIUM NITRATES
HYPERFINE STRUCTURE
INTERATOMIC DISTANCES
LATTICE PARAMETERS
SPACE GROUPS
STARK EFFECT
TPO
X-RAY DIFFRACTION
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DISTANCE
ELEMENTARY PARTICLES
ENERGY
EUROPIUM COMPOUNDS
FERMIONS
LEPTONS
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
RARE EARTH COMPLEXES
RARE EARTH COMPOUNDS
SCATTERING
VALENCE
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Molecular & Chemical Physics- Atomic & Molecular Properties & Theory