Transition metals in organic synthesis: highlights for the year 1996

Hegedus, Louis S.

doi:10.1016/s0010-8545(97)00067-2

Cited by 26 publications

(5 citation statements)

References 1,093 publications

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“…There has been considerable current interest in the utilization of transition metals in promoting interesting chemical transformations of organic substrates . Such reactions often proceed via a C−H activation of the organic substrate, leading to the formation of a reactive organometallic intermediate, which then undergoes further reactions to yield the final product.…”

Section: Introductionmentioning

confidence: 99%

Ruthenium Mediated C−H Activation of 2-(Arylazo)phenols: Characterization of an Intermediate and the Final Organoruthenium Complex

et al. 2005

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Reaction of 2-(arylazo)phenols with [Ru(PPh(3))(2)(CO)(2)Cl(2)] affords a family of organometallic complexes of ruthenium(II) of type [Ru(PPh(3))(2)(CO)(CNO-R)], where the 2-(arylazo)phenolate ligand (CNO-R; R = OCH(3), CH(3), H, Cl, and NO(2)) is coordinated to the metal center as tridentate C,N,O-donor. Another group of intermediate complexes of type [Ru(PPh(3))(2)(CO)(NO-R)(H)] has also been isolated, where the 2-(arylazo)phenolate ligand (NO-R) is coordinated to the metal center as bidentate N,O-donor. Structures of the [Ru(PPh(3))(2)(CO)(NO-OCH(3))(H)] and [Ru(PPh(3))(2)(CO)(CNO-OCH(3))] complexes have been determined by X-ray crystallography. All the complexes are diamagnetic and show characteristic (1)H NMR signals and intense MLCT transitions in the visible region. Both the [Ru(PPh(3))(2)(CO)(NO-R)(H)] and [Ru(PPh(3))(2)(CO)(CNO-R)] complexes show two oxidative responses on the positive side of SCE.

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Section: Introductionmentioning

confidence: 99%

Ruthenium Mediated C−H Activation of 2-(Arylazo)phenols: Characterization of an Intermediate and the Final Organoruthenium Complex

et al. 2005

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“…Two more samples were produced with a larger PMMA layer thickness such that it is detuned from the CO mode (again, one with two mirrors and one with a single mirror). This set allowed us to evaluate the effect of (i) cavity tuning and (ii) the presence or absence of the cavity mode while maintaining the presence of a metal layer since metals can catalyze carbon–carbon reactions. , Time-dependent spectra acquired at different incident powers (sample data in the SI) show that the onset of decomposition occurs at ∼20 mW; however, the various cavities exhibited somewhat different decomposition onset behaviors. The tuned full cavity (sample A) showed the onset of CC formation at 19.6 mW after ∼90 s, while detuned and single mirror samples showed decomposition onset at powers between 20.0 and 23.0 mW (time-series showing decomposition are given in SI Figure S1).…”

Section: Resultsmentioning

confidence: 99%

Raman Scattering under Strong Vibration-Cavity Coupling

Ahn

Simpkins

2020

J. Phys. Chem. C

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Strong cavity coupling can have profound effects on fundamental material properties. In this work, we examine the Raman scattering response of a poly(methyl methacrylate) (PMMA) carbonyl band under vibrational strong coupling in a Fabry−Peŕot cavity. Collecting Raman scattering spectra in a cross-sectional geometry allows polarization-based discrimination between the cavity-modified and conventional bulk response. In this system, strong coupling reveals itself by a softening of the blue side of the Raman scattering feature and a small dip near the fundamental vibrational frequency. These couplinginduced features are due to the upper and lower polaritons, which disperse over the collection angle of the microscope objective. Control measurements of detuned and half-cavities confirm that the features originate from strong coupling. Modeling of this response is carried out, taking these issues into account and provide reasonable agreement to experiment.

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“…Metal mediated chemical transformation of organic substrates belongs to an area of research, which has been receiving considerable attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. A key step in such reactions is the activation of C-H or C-C bond in the organic substrates, which is usually achieved through their interaction with soft metal centers.…”

Section: Introductionmentioning

confidence: 99%