Conformationally rigid annelated arene complexes: Cyclobutabenzenetricarbonylchromium(0) derivatives

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  • Max-Planck-Institut für Kohlenforschung
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OriginalspracheEnglisch
Seiten (von - bis)C8-C12
FachzeitschriftJournal of Organometallic Chemistry
Jahrgang350
Ausgabenummer1
PublikationsstatusVeröffentlicht - 2 Aug. 1988
Extern publiziertJa

Abstract

Several cyclobutabenzenetricarbonylchromium(0) complexes have been prepared by reaction of substituted cyclobutabenzenes with triammintricarbonylchromium(0) (13), and characterized by 1H NMR, 13C NMR, IR, and mass spectroscopy. Diastereomer ratios were determined by 1H NMR, and signal assignments were verified by a NOE experiment. HPLC separation of diastereometric products was carried out in one representative case. A photochemical carbonyl ligand exchange took place in 70% yield with triphenylphosphane. Deprotonation of cyclobutabenzenetricarbonylchromium(0) (2) with n-BuLi/tmeda was observed only for the aromatic protons, not the benzylic ones.

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Conformationally rigid annelated arene complexes: Cyclobutabenzenetricarbonylchromium(0) derivatives. / Wey, Hans G.; Butenschön, Holger.
in: Journal of Organometallic Chemistry, Jahrgang 350, Nr. 1, 02.08.1988, S. C8-C12.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

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abstract = "Several cyclobutabenzenetricarbonylchromium(0) complexes have been prepared by reaction of substituted cyclobutabenzenes with triammintricarbonylchromium(0) (13), and characterized by 1H NMR, 13C NMR, IR, and mass spectroscopy. Diastereomer ratios were determined by 1H NMR, and signal assignments were verified by a NOE experiment. HPLC separation of diastereometric products was carried out in one representative case. A photochemical carbonyl ligand exchange took place in 70% yield with triphenylphosphane. Deprotonation of cyclobutabenzenetricarbonylchromium(0) (2) with n-BuLi/tmeda was observed only for the aromatic protons, not the benzylic ones.",
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note = "Funding information:H. .B. is much obliged to the Verband der ChemischenI ndustrie for a Liebig fellowship. H.G.W. thanks the Max-Planck-Gesellschaft for a graduate fellowship. We cordially thank the director of the Max-Planck-Institut fi.ir Kohlen-forschung, Professor G. Wilke, for his generous support of our work. We are indebted to Dr. A. Rufinska for NOE measurementsa nd to Mr. A. Deege for HPLC separations.",
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T2 - Cyclobutabenzenetricarbonylchromium(0) derivatives

AU - Wey, Hans G.

AU - Butenschön, Holger

N1 - Funding information:H. .B. is much obliged to the Verband der ChemischenI ndustrie for a Liebig fellowship. H.G.W. thanks the Max-Planck-Gesellschaft for a graduate fellowship. We cordially thank the director of the Max-Planck-Institut fi.ir Kohlen-forschung, Professor G. Wilke, for his generous support of our work. We are indebted to Dr. A. Rufinska for NOE measurementsa nd to Mr. A. Deege for HPLC separations.

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N2 - Several cyclobutabenzenetricarbonylchromium(0) complexes have been prepared by reaction of substituted cyclobutabenzenes with triammintricarbonylchromium(0) (13), and characterized by 1H NMR, 13C NMR, IR, and mass spectroscopy. Diastereomer ratios were determined by 1H NMR, and signal assignments were verified by a NOE experiment. HPLC separation of diastereometric products was carried out in one representative case. A photochemical carbonyl ligand exchange took place in 70% yield with triphenylphosphane. Deprotonation of cyclobutabenzenetricarbonylchromium(0) (2) with n-BuLi/tmeda was observed only for the aromatic protons, not the benzylic ones.

AB - Several cyclobutabenzenetricarbonylchromium(0) complexes have been prepared by reaction of substituted cyclobutabenzenes with triammintricarbonylchromium(0) (13), and characterized by 1H NMR, 13C NMR, IR, and mass spectroscopy. Diastereomer ratios were determined by 1H NMR, and signal assignments were verified by a NOE experiment. HPLC separation of diastereometric products was carried out in one representative case. A photochemical carbonyl ligand exchange took place in 70% yield with triphenylphosphane. Deprotonation of cyclobutabenzenetricarbonylchromium(0) (2) with n-BuLi/tmeda was observed only for the aromatic protons, not the benzylic ones.

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