X-ray diffraction investigation of crystals of bis(nitrosodicyano-methanido)tetrakis(tris(dimethylamino)phosphine oxide)ytterbium(III) nitrosodicyanomethanide, (Yb/ONC(CN/sub 2/)//sub 2//OP(N(CH/sub 3/)/sub 2/)/sub 2///sub 4/)ONC(CN)/sub 2/ (in Russian)
The crystal structure of (Yb/ONC(CN)/sub 2///sub 2//OP(N(CH/sub 3/)/sub 2/)/sub 3///sub 4/)ONC(CN)/sub 2/ has been determined by x-ray diffraction analysis (diffractomter, Mo K..cap alpha.. radiation, 4396 reflections, isotropic-anisotropic least-squares method in the full-matrix variant to R = 0.081). The parameters of the monoclinic cell are: a = 11.440(3), b = 14.728(3), c = 34.912(9) A, ..beta.. = 97.53(2)/sup 0/, V = 5832(3) A/sup 3/, d(pycn) = 1.30(1), d(x-ray) = 1.335 g/cm/sup 3/, Z = 4, space group P2/sub 1//c. The structural elements of the crystals are the (Yb/ONC(CN)/sub 2///sub 2//OP(N(CH/sub 3/)/sub 2/)/sub 3///sub 4/)/sup +/ complex cation and the outer-sphere ONC(CN)/sub 2/ group, which randomly occupies two positions. The coordination number of ytterbium is 6 (all the ligands are coordinated as monodentate ligands by means of an oxygen atom), and the coordination polyhedron is an asymmetrically elongated tetragonal bipyramid, whose axial vertices are occupied by the oxygen atoms of the ..pi..-acid ligands. The mean length of the Yb-O(OP(N(CH/sub 3/)/sub 2/)/sub 3/) bonds is 2.197(11) A. The distances from the Yb atom to the oxygen atoms of the ONC(CN)/sub 2/ groups are equal to 2.233(15) and 2.315(18) A. A special feature of the complex cation is the presence of a fourth-order inversion pseudoaxis. A discussion of the structure of the coordination polyhedron and of the phosphoryl and nitrosodicyanomethanide ligands has been conducted with the aid of literature data.
- Research Organization:
- T.G. Shevchenko Kiev State Univ., USSR
- OSTI ID:
- 6509502
- Journal Information:
- Sov. J. Coordinat. Chem.; (United States), Vol. 11:4; Other Information: Translated from Koordinatsionnaya Khimiya; 22: No. 5, 532-539(Apr 1985)
- Country of Publication:
- United States
- Language:
- Russian
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
YTTERBIUM COMPLEXES
CRYSTAL LATTICES
ELECTRONIC STRUCTURE
STRUCTURAL CHEMICAL ANALYSIS
X-RAY DIFFRACTION
BOND ANGLE
BOND LENGTHS
COMPLEXOMETRY
COORDINATION NUMBER
COORDINATION VALENCES
CYANIDES
ERBIUM COMPLEXES
INTERATOMIC DISTANCES
LATTICE PARAMETERS
LEAST SQUARE FIT
LIGANDS
NEODYMIUM COMPLEXES
NITROSO COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
THULIUM COMPLEXES
COHERENT SCATTERING
COMPLEXES
CRYSTAL STRUCTURE
DIFFRACTION
DIMENSIONS
DISTANCE
LENGTH
MAXIMUM-LIKELIHOOD FIT
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RARE EARTH COMPLEXES
SCATTERING
VALENCE
400201* - Chemical & Physicochemical Properties
360602 - Other Materials- Structure & Phase Studies