Crystal structure of (HRh(P(O-i-C/sub 3/H/sub 7/)/sub 3/)/sub 2/)/sub 2/: a neutron diffraction study
Journal Article
·
· Inorg. Chem.; (United States)
- Brookhaven National Lab., Upton, NY
A neutron diffraction study of (HRh(P(O-i-C/sub 3/H/sub 7/)/sub 3/)/sub 2/)/sub 2/ confirmed the square-planar coordination geometry inferred from spectroscopic data and accurately placed the hydride ligands at bridging positions. At 112.4/sup 0/K, the crystal lattice was triclinic, of space group P anti 1, with a = 12.084 (3) A, b = 13.505 (6) A, c = 9.540 (2) A, ..cap alpha.. = 97.49 (2)/sup 0/, ..beta.. = 105.18 (1)/sup 0/, ..gamma.. = 116.15 (2)/sup 0/, V/sub c/ = 1074.4 A/sup 3/, and Z = 1. The Rh-Rh distances were 2.65 (1) A, and the Rh-H distances were 1.808 (14) A with H-Rh-H and Rh-H-Rh angles of 85.9 (5) and 94.1 (4)/sup 0/, respectively. With an only slightly expanded P-Rh-P angle of 94.7 (4)/sup 0/, near 90/sup 0/ average H-Rh-P angles, and near coplanarity of the H/sub 2/Rh/sub 2/P/sub 4/ system, the square-planar coordination geometry about each rhodium atom was established unequivocally. The planar Rh/sub 2/H/sub 2/ system is rectangular with 2.65- and 2.46-A diagonals. Two four-center (Rh/sub 2/H/sub 2/) two-electron bonds are responsible for the framework bonding in the diameter. The net Mulliken bond order for the direct Rh-Rh interaction is positive but very small whereas those for Rh-H are large, nearly 0.5, as indicated by a molecular orbital analysis.
- OSTI ID:
- 6342129
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 20:6; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coordinately unsaturated metal clusters. A neutron diffraction study of the crystal and molecular structure of the trimeric rhodium complex (HRh(P(OCH/sub 3/)/sub 3/)/sub 2/)/sub 3/
X-ray crystal structure of solvent-free hydridotris(triphenylphosphine) rhodium, HRh(PPh/sub 3/)/sub 3/
Neutron diffraction analysis of HRh(P(C/sub 6/H/sub 5/)/sub 3/)/sub 4/
Journal Article
·
Thu Jan 31 23:00:00 EST 1980
· Inorg. Chem.; (United States)
·
OSTI ID:5313678
X-ray crystal structure of solvent-free hydridotris(triphenylphosphine) rhodium, HRh(PPh/sub 3/)/sub 3/
Journal Article
·
Tue Dec 31 23:00:00 EST 1985
· J. Coord. Chem.; (United States)
·
OSTI ID:5533084
Neutron diffraction analysis of HRh(P(C/sub 6/H/sub 5/)/sub 3/)/sub 4/
Conference
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:6039806
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
BOND ANGLE
BOND LENGTHS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
DIMENSIONS
EXPERIMENTAL DATA
INFORMATION
LENGTH
LIGANDS
NEUTRON DIFFRACTION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOSPHORUS COMPLEXES
RHODIUM COMPOUNDS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
TRICLINIC LATTICES
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
BOND ANGLE
BOND LENGTHS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
DIMENSIONS
EXPERIMENTAL DATA
INFORMATION
LENGTH
LIGANDS
NEUTRON DIFFRACTION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOSPHORUS COMPLEXES
RHODIUM COMPOUNDS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
TRICLINIC LATTICES