INHIBITED LIGAND MOBILITIES IN TRANSITION-METAL COMPLEXES .30. SYNTHESIS AND DYNAMIC BEHAVIOR OF TRICARBONYL-ETA-4-DIEN-TRIMETHYL PHOSPHITE TUNGSTEN(0) COMPLEXES

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1986-04-01

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Özkar, Saim

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https://hdl.handle.net/11511/69986

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JOURNAL OF ORGANOMETALLIC CHEMISTRY

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https://doi.org/10.1016/0022-328x(86)82039-3

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Department of Chemistry, Article

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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) KOTZIAN, M; KREITER, CG; MICHAEL, G; Özkar, Saim (Wiley, 1983-01-01) Irradiation of Cr(CO)5[P(CH3)3] or Cr(CO)5[P(OCH3)3] in presence of 1,3‐butadiene (1), trans‐1,3‐pentadiene (2), and 2‐ethyl‐1,3‐butadiene (3), trans, trans‐2,4‐hexadiene (4), 2‐methyl‐1,3‐pentadiene (5), and 2‐ethyl‐1,3‐butadiene (6) produces in good yields Cr(CO)3L(η4‐diene) complexes (LP(CH3)3 1A–6A; LP(OCH3)3 1B–6B). The configurations of these complexes were determined by IR and NMR spectroscopy (1H, 13C, 31P). Cr(CO)3[P(OCH3)3](η4‐1,3‐pentadiene) (2B) and Cr(CO)3[P(OCH3)3](η4‐2,4‐hexadiene) (4B) for...
HINDERED LIGAND MOVEMENTS IN TRANSITION-METAL COMPLEXES .45. STRUCTURE AND DYNAMIC BEHAVIOR OF CIS-DICARBONYL-BIS(ETA(4)-1,3-DIENE)CHROMIUM(0), CIS-DICARBONYL-BIS(ETA(4)-1,3-DIENE)MOLYBDENUM(0) AND CIS-DICARBONYL-BIS(ETA(4)-1,3-DIENE)TUNGSTEN(0) COMPLEXES 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 LIGAND MOVEMENTS IN TRANSITION-METAL COMPLEXES .14. DYNAMIC BEHAVIOR OF NU-DIENECHROMIUM(0) AND MOLYBDENUM(0) COMPLEXES KREITER, CG; Özkar, Saim (1978-01-01) 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 ...
HINDERED LIGAND MOVEMENTS IN TRANSITION-METAL COMPLEXES .40. SYNTHESIS AND DYNAMIC BEHAVIOR OF TRICARBONYL-ETA-4-TRICYCLO[6.3.0.0(2.7)]UNDECA-3,5-DIENE-TRIMETHYLPHOSPHITE-METAL(0) AND DICARBONYL-ETA-4-TRICYCLO[6.3.0.0(2.7)]UNDECA-3,5-DIENE-BIS(TRIMETHYLPHOSPHITE)-METAL(0) COMPLEXES OF CHROMIUM, MOLYBDENUM AND TUNGSTEN KREITER, CG; KOTZIAN, M; Özkar, Saim; ABUMOUR, I (1992-06-01) Tricarbonyl-eta-4-tricyclo[6.3.0.02.7]undeca-3,5-diene-trimethylphosphite-metal(0) and cis-dicarbonyl-eta-4-tricyclo[6.,3.0.02,7]undeca-3,5-diene-bis(trimethylphosphite)metal(0) complexes of chromium (1,4), molybdenum (2,5) and tungsten (3,6) have been prepared photochemically in high yields from the corresponding pentacarbonyl-trimethylphosphite-meta](0) or tetracarbonyl-bis(trimethylphosphite) metal(0) complexes, respectively, with tricyclo[6.3 .0.02,7 ]undeca-3,5-diene. The stereochemistry of 1-6 was det...
RESTRICTED LIGAND MOTION IN TRANSITIONAL METAL-COMPLEXES .15. DYNAMIC BEHAVIOR OF TETRACARBONYL-ETA-DIEN-CHROM(0)-COMPLEXES KOTZIAN, M; KREITER, CG; Özkar, Saim (1982-01-01) Tetracarbonyl-η-dienechromium(O) complexes (diene  1,3-butadiene (I), trans-1,3-pentadiene (II), 2-methyl-1,3-butadiene (III), trans,trans-2,4-hexadiene (IV), 2-methyl-1,3-pentadiene (V), 2-ethyl-1,3-butadiene (VI), 2,4-pentadienoic acid methylester (VII), 2,4-hexadienoic acid methylester (VIII), 1,3-cyclohexadiene (IX) and 1,5-cyclooctadiene (X)) have been prepared photochemically and studied by 1H and 13C NMR spectroscopy. The 13C carbonyl ligand signals of I–VIII were found to be temperature dependent, ...

Citation Formats

S. Özkar, “INHIBITED LIGAND MOBILITIES IN TRANSITION-METAL COMPLEXES .30. SYNTHESIS AND DYNAMIC BEHAVIOR OF TRICARBONYL-ETA-4-DIEN-TRIMETHYL PHOSPHITE TUNGSTEN(0) COMPLEXES,” JOURNAL OF ORGANOMETALLIC CHEMISTRY, pp. 367–374, 1986, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/69986.