Pentacarbonyl(eta(2)-vinylferrocene)metal(0) complexes of Group 6 elements: synthesis and characterization

Date

2003-12-15

Author

Özkar, Saim
Demir, N

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

231
views

0
downloads

Photolysis of hexacarbonylmetal(0) complexes of the Group 6 elements in the presence of vinylferrocene in an n-hexane solution at -15 degreesC yields pentacarbonyl (eta(2)-vinylferrocene)metal(0) complexes as the sole photo-substitution product, different from the general reaction pattern observed for the same Group 6 metal carbonyls with other olefins. M(CO)(5)(eta(2)-vinylferrocene) complexes (M = Cr, Mo, W) could be isolated from the solution and characterized by using spectroscopic techniques. The complexes were found to be not very stable and their stability increases in the order Cr < Mo < W. The relatively stable W(CO)(5)(eta(2)-vinylferrocene) could be isolated as-a pure solid and characterized by elemental analysis, MS, IR and NMR spectroscopy, while the solid samples of the less stable Cr(CO)(5)(eta(2)-vinylferrocene) and Mo(CO)(5)(eta(2)-vinylferrocene) complexes were found to be contaminated with free vinylferrocene and characterized only by using IR and NMR spectroscopy.

Subject Keywords

Physical and Theoretical Chemistry, Inorganic Chemistry, Organic Chemistry, Materials Chemistry, Biochemistry

URI

https://hdl.handle.net/11511/35520

Journal

JOURNAL OF ORGANOMETALLIC CHEMISTRY

DOI

https://doi.org/10.1016/j.jorganchem.2003.08.031

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Carbonyltungsten(0) complexes of acryloylferrocene: Synthesis and characterization Boga, Dilek Ayse; Özkar, Saim (Elsevier BV, 2006-07-15) Photolysis of hexacarbonyltungsten(0) in the presence of acryloylferrocene in n-hexane solution at 10 C yields pentacarbonyl(eta(2)-acryloylferrocene)tungsten(0) (1) as the only photo-substitution product, different from the general reaction pattern observed for the Group 6 metal carbonyls with other olefins. W(CO)5(eta(2)-acryloylferrocene) (1) decomposes in solution to the parent hexacarbonyltungsten(0) and free acryloylferrocene. Trimethylphosphite was introduced as ligand into the molecule to increase t...
Aminophosphine-palladium(II) complexes: Synthsesis, structure and applications in Suzuki and Heck cross-coupling reactions AYDEMİR, MURAT; BAYSAL, AKIN; ŞAHİN, Ertan; Gumgum, Bahattin; Özkar, Saim (Elsevier BV, 2011-11-30) Reaction of furfurylamine with 1 or 2 equivalents of PPh2Cl in the presence of Et3N, proceeds under anaerobic conditions in thf to give furfuryl-2-(N-diphenylphosphino)amine, Ph2PNHCH2-C4H3O, 1 and furfuryl-2-(N,N-bis(diphenylphosphino)amine), (Ph2P)(2)NCH2-C4H3O, 2, respectively. The reactions of 1 and 2 with MCl2(cod) (M = Pd, Pt; cod = 1,5-cyclooctadiene) or Pt(CH3)(2)(cod) yield complexes [M(Ph2PNHCH2-C4H3O)(2)Cl-2] (M= Pd 1a, Pt 1b), [Pt(Ph2PNHCH2-C4H3O)(2)(CH3)(2)] (1c), and [M((Ph2P)(2) NCH2-C4H3O)Cl...
Benzaldehyde lyase-catalyzed enantioselective carboligation of aromatic aldehydes with mono- and dimethoxy acetaldehyde Demir, Ayhan Sıtkı; Sesenoglu, O; Dunkelmann, P; Muller, M (American Chemical Society (ACS), 2003-06-12) Benzaldehyde lyase from the Pseudomonas fluorescens catalyzes the reaction of aromatic aldehydes with methoxy and dimethoxy acetaldehyde and furnishes (R)-2-hydroxy-3-methoxy-1-arylpropan-1-one and (R)-2-hydroxy-3,3-dimethoxy-1-arylpropan-1-one in high yields and enantiomeric excess via acyloin linkage. Aromatic aldehydes and benzoins are converted into enamine-carbanion-like intermediates prior to carboligation.
Organosilanols as Catalysts in Asymmetric Aryl Transfer Reactions Özçubukçu, Salih; BOLM, Carsten (American Chemical Society (ACS), 2005-03-01) Various ferrocene-based organosilanols have been synthesized in four steps starting from achiral ferrocene carboxylic acid. Applying these novel planar-chiral ferrocenes as catalysts in asymmetric phenyl transfer reactions to substituted benzaldehydes afforded products with high enantiomeric excesses. The best result (91% ee) was achieved in the addition to p-chlorobenzaldehyde with organosilanol 2b, which has a tert-butyl substituent on the oxazoline ring and an isopropyl group on the silanol fragment.
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 Özkar, Saim; KREITER, CG (Elsevier BV, 1992-05-01) 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...

Citation Formats

S. Özkar and N. Demir, “Pentacarbonyl(eta(2)-vinylferrocene)metal(0) complexes of Group 6 elements: synthesis and characterization,” JOURNAL OF ORGANOMETALLIC CHEMISTRY, pp. 62–67, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35520.