The contact distances from H to the center of the C=C bond are typically 2.8 Angstrom, with the shortest distances being similar to 2.5 Angstrom. The interaction is of pronounced long-range nature and can be detected in the infrared spectrum even with a long H...pi distance of almost 3.0...
The IR spectrum of 1 suggested absorp- tion bands of OH (3396 cm− 1) and carbonyl groups (1671 cm − 1). The 1H NMR and 1H-1H-COSY of 1 (Table 1, Supplementary Figures S1 and S3) allowed the construction of two spin systems (Figure 2): H-5′–H-6′, ((δH 7.21 (d,...
Keith Fagnou.Analysis of the Palladium-Catalyzed (Aromatic)C-H Bond Metalation-Deprotonation Mechanism Spanning the Entire Spectrum of Arenes.Journal of ... Gorelsky,I Serge,Lapointe,... - 《Journal of Organic Chemistry》 被引量: 32发表: 2012年 Analysis of the palladium-catalyzed (aromatic)C-...
Such conditions can shift the absorption spectrum into the visible region, resulting in a noticeable color of the complex. Table 2. Selected IR data of each ligand and its complexes (cm−1). 2.2. Photocatalytic Property Previous studies have demonstrated that uranyl(VI) can serve as an ...
I.r. spectroscopy on their polystyrene-bonded forms indicates that with complexes of the type (η5-C5H5)W(CO)3R (R = H, Cl) olefin metathesis proceeds with preservation of the structural unit (η-C5H5)W(CO)3.DOI: 10.1039/C39870001152 年份: 1987 收藏 引用 批量引用 报错 分享 全部来...
Supercritical CO2(scCO2) is used to impregnate high density polyethylene film with [(C5Me5)Ir(CO)2]; UV irradiation causes changes in the IR spectrum consistent with C–H activation and formation of [(C5Me5)Ir(CO)(H)(polymer)], and subse... M Jobling,SM Howdle,M Poliakoff - 《Jo...
The IR spectrum of 3a shows a clear absorption at 343 cm−1, assigned to the stretching ν(Pd-Cl), as well as the disappearance of the absorptions assigned to the CF3CO2 ligand in 2a (1627 cm−1 and 1139 cm−1). On the other hand, the HRMS spectrum of 3a shows a peak at...
We therefore resorted to changing the reactivity of the MG core by “removing” the indole double bond (2,3-π bond in indole numbering) by either reduction or oxidation, or oxidation followed by rearrangement (Fig. 3). 7OH was examined as an indolenine substrate in the Ir-catalyzed borylat...
Fe(dmpe)2 differs drastically from Ru(dmpe)2 in its absorption spectrum and its reactivity. Most notably, the rate constant for reaction with H-2 is a factor of 7500 smaller for Fe(dmpe)2 than for Ru(dMpe)2. In contrast, reactions of both complexes with CO are diffusion-controlled. ...
This property distinguishes them from precious metal Ru or Ir complexes commonly used in mainstream photoredox catalysis [13]. When light is absorbed in the LMCT band, a metal-ligand bond undergoes homolytic cleavage, resulting in a reduced metal complex and a high-energy oxidized ligand radical ...