Structure of eta/sup 5/-cyclopentadienyl(sulfur dioxide)ethenylrhodium(I), (C/sub 5/H/sub 5/)Rh(C/sub 2/H/sub 4/)SO/sub 2/. A d/sup 8/ complex with a planar MSO/sub 2/ group
The structure of (C/sub 5/H/sub 5/)Rh(C/sub 2/H/sub 4/)SO/sub 2/ has been determined by single-crystal x-ray techniques. The compound crystallizes in the orthorhombic space group Pcmn with cell constants of a = 7.230 (3), b = 8.420 (2), and c = 14.124 (2) A. The structure was refined to an unweighted R value of 0.029 using the 696 reflections (20 less than or equal to 50/sup 0/) whose intensities were observed to be greater than 2sigma above background (813 were measured) on an automated Picker four-circle diffractometer (Mo K..cap alpha.. radiation). The Rh atom is on the crystallographic mirror plane with the C/sub 5/H/sub 5/ and ethylene groups perpendicular to the plane. The SO/sub 2/ moiety is contained in the same plane, the Rh-S distance being 2.096 (2) A. Important distances and angles are Rh-C = 2.201 (6)-2.223 (7) A for the C/sub 5/H/sub 5/ ring, Rh--C = 2.155 (6) A for the ethylene group, S--O = 1.442 (7) and 1.430 (8) A, Rh--S--O = 124.3 (4) and 121.4 (4)/sup 0/, and O--S--O = 114.4 (5)/sup 0/. The S--Rh--C/sub 2/H/sub 4/ midpoint angle is 92.8 (2)/sup 0/. This is the first structure to be reported for a d/sup 8/ transition metal complex with a planar M--SO/sub 2/ group, a result which is discussed in terms of a general molecular orbital model for transition metal-sulfur dioxide complexes. (auth)
- Research Organization:
- Los Alamos Scientific Lab., NM
- OSTI ID:
- 7351191
- Journal Information:
- Inorg. Chem.; (United States), Vol. 15:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CYCLOALKENES
STRUCTURAL CHEMICAL ANALYSIS
RHODIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES
BOND ANGLE
BOND LENGTHS
MOLECULAR ORBITAL METHOD
RHODIUM COMPOUNDS
SULFUR DIOXIDE
X-RAY DIFFRACTION
ALKENES
CHALCOGENIDES
COHERENT SCATTERING
COMPLEXES
DIFFRACTION
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SULFUR COMPOUNDS
SULFUR OXIDES
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties