Divalent lanthanide chemistru. Preparation of some four- and six-coordinate bis((trimethylsilyl)amido) complexes of europium (II). Crystal strycture of bis(bis(trimethylsilyl)amido)bis(1,2-dimethoxyethane)europium (II)
The yellow, hydrocarbon-soluble, divalent derivatives of europium(II) of the type ((Me/sub 3/Si)/sub 2/N)/sub 2/Eu(L)/sub 2/, where L is tetrahydrofuran or 1,2-dimethyoxyethane, and ((Me/sub 3/Si)/sub 2/N)/sub 2/Eu(bpy) have been prepared. The crystal structure of ((Me/sub 3/Si)/sub 2/N)/sub 2/Eu(MeOCH/sub 2/CH/sub 2/OMe)/sub 2/ has been determined by single-crystal x-ray diffraction methods. The crystals are monoclinic, C2/c, with cell dimensions a = 13.398 (4) A, b = 17.454 (6) A, c = 15.013 (5) A, ..beta.. = 92.91 (3)/sup 0/, and V = 3506 A/sup 3/. For Z = 4, the calculated density is 1.24 g/cm/sup 3/. The structure was refined to a conventional R factor of 0.039 by using 2259 data where F/sup 2/ > sigma(F/sup 2/). The Eu(II) atom is hexacoordinate and bonded to two nitrogen atoms of the two bis(trimethylsilyl)amido groups and to four oxygen atoms of the 1,2-dimethoxyethane ligands. The molecule has C/sub 2/ symmetry. The Eu(II)-N bond distance is 2.530 (4) and the Eu(II)-O distances are 2.634 (4) and 2.756 (4) A. The ethane carbon atoms in the 1,2-dimethoxyethane ligand are disordered.
- Research Organization:
- Lawrence Berkeley Lab., CA
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6604953
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 20:2; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
CHEMICAL PREPARATION
COHERENT SCATTERING
COMPLEXES
CRYSTAL STRUCTURE
DIFFRACTION
EUROPIUM COMPLEXES
FURANS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
RARE EARTH COMPLEXES
SCATTERING
SILANES
SILICON COMPOUNDS
SYNTHESIS
TETRAHYDROFURAN
X-RAY DIFFRACTION