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HINDERED LIGAND MOVEMENTS IN TRANSITION-METAL COMPLEXES .14. DYNAMIC BEHAVIOR OF NU-DIENECHROMIUM(0) AND MOLYBDENUM(0) COMPLEXES
Date
1978-01-01
Author
KREITER, CG
Özkar, Saim
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The stereochemistry of tetracarbonyl-η-1,5-cyclooctadienechromium(0) (, tetracarbonyl-η-1,3-butadienechromium(0) (, mer-tricarbonyltrimethylphosphite-η-1,5-cyclooctadienechromium(0) (, fac-tricarbonyltrimethylphosphite-η-1,3-butadienechromium(0) ()l and cis-dicarbonyldi-η-1,3-butadienemolybdenum(0) () has been investigated by 1H and 13C NMR spectroscopy. , , and show temperature-dependent 13C NMR spectra, according to thermally activated polytopal rearrangements, possibly via trigonal prismatic transition states.
URI
https://hdl.handle.net/11511/70014
Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
DOI
https://doi.org/10.1016/s0022-328x(00)81283-8
Collections
Department of Chemistry, Article
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Özkar, Saim; KOTZIAN, M (Elsevier BV, 1995-05-01)
The static and dynamic stereochemistry of cis-bis(eta(4)-1,3-butadiene)dicarbonyl-molybdenum(0)(1) and -tungsten(0)(2), as well as of cis-dicarbonyl-bis(eta(4)-1,3-cyclodexadiene)chromium(0)(3), -molybdenum(0)(4) and -tungsten(0)(5) was studied by IR and NMR spectroscopy. The complexes 1-5 show temperature-dependent NMR spectra, according to hindered ligand movements. In the case of 1, the crystal and molecular structure were determined by an X-ray diffraction analysis.
HINDERED LIGANDS IN TRANSITION-METAL COMPLEXES .39. SYNTHESIS AND DYNAMIC BEHAVIOR OF TETRACARBONYL-ETA-4-TRICYCLO[6.3.0.0(2.7)]UNDECA-3,5-DIENE METAL(0) COMPLEXES AND DICARBONYL-BIS-(ETA-4-TRICYCLO[6.3.0.0(2.7)]UNDECA-3,5-DIENE METAL(0) COMPLEXES OF THE ELEMENTS CHROMIUM, MOLYBDENUM AND TUNGSTEN
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The hexacarbonyls of chromium, molybdenum, and tungsten react with tricyclo[6.3.0.0(2,7)]undeca-3,5-diene upon UV irradiation in a first step to tetracarbonyl-eta-4-tricyclo[6.3.0.0(2.7)]undeca-3,5-diene-chromium(0) (1), -molybdenum(0) (2) and -tungsten(0) (3). By longer irradiation, dicarbonyl-bis(eta-4-tricyclo[6.3.0.0(2.7)]undeca-3,5-diene)molybdenum(0) (4) and -tungsten(0) (5) are formed. The complexes were purified by chromatography and studied by IR, H-1, and C-13 NMR spectroscopy. The C-13 NMR signal...
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HINDERED LIGAND MOTIONS IN TRANSITION-METAL COMPLEXES .18. SYNTHESIS AND DYNAMIC BEHAVIOR OF TRICARBONYL(ETA-DIENE)(TRIMETHYLPHOSPHANE)CHROMIUM(0) AND TRICARBONYL(ETA-DIENE)(TRIMETHYL PHOSPHITE)CHROMIUM(0)
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C. KREITER and S. Özkar, “HINDERED LIGAND MOVEMENTS IN TRANSITION-METAL COMPLEXES .14. DYNAMIC BEHAVIOR OF NU-DIENECHROMIUM(0) AND MOLYBDENUM(0) COMPLEXES,”
JOURNAL OF ORGANOMETALLIC CHEMISTRY
, pp. 0–0, 1978, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70014.