Deuteration effects on the vibronic structure of the fluorescence spectra and the internal conversion rates of triangular [4]phenylene
作者:C. Dosche、M. U. Kumke、H.-G. Löhmannsröben、F. Ariese、A. N. Bader、C. Gooijer、O. Š. Miljanić、M. Iwamoto、K. P. C. Vollhardt、R. Puchta、N. J. R. van Eikema Hommes
DOI:10.1039/b414545c
日期:——
Deuteration effects on the vibronic structure of the emission and excitation spectra of triangular [4]phenylene (D3h [4]phenylene) were studied using laser-excited Shpol’skii spectroscopy (LESS) in an octane matrix at 4.2K. For correct assignment of the vibrational modes, the experimental results were compared with calculated frequencies (B3LYP/6-31G*). CH vibrations were identified by their characteristic
Synthesis, structure, and dynamics of endo-(starphenylene)chromium tricarbonyl derivatives: observation of metal-arene migration and hindered metal-tripod rotation
作者:Mitch Nambu、Debra L. Mohler、Kenneth Hardcastle、Kim K. Baldridge、Jay S. Siegel
DOI:10.1021/ja00067a032
日期:1993.7
The dynamic stereochemistry of endo-(starphenylene)chromiumtricarbonyl, enro-1-Cr, is elucidated through NMR spectroscopic methods. Intramolecular metal-arene migration and hindered metal-tripod rotation are observed in closely related derivatives of enro-1-Cr. The stereochemistry of these systems is modeled well by ab initio local density functional theory methods
内-(星形亚苯基)三羰基铬,enro-1-Cr 的动态立体化学是通过核磁共振光谱方法阐明的。在密切相关的 enro-1-Cr 衍生物中观察到分子内金属-芳烃迁移和受阻金属-三脚架旋转。这些系统的立体化学通过 ab initio 局部密度泛函理论方法很好地建模
Activated Phenacenes from Phenylenes by Nickel-Catalyzed Alkyne Cycloadditions
作者:Zhenhua Gu、Gregory B. Boursalian、Vincent Gandon、Robin Padilla、Hao Shen、Tatiana V. Timofeeva、Paul Tongwa、K. Peter C. Vollhardt、Andrey A. Yakovenko
DOI:10.1002/anie.201103428
日期:2011.9.26
Going zigzag, helical, or in‐between: Angular phenylenes show a propensity for adding alkynesfrom the bay region in processes catalyzed by [Ni(cod)(PMe3)2] (see scheme). These transformations generate novel strain‐ and electronically activatedphenacenes. Mechanistic studies in conjunction with DFT calculations (R=Ph) provide a plausible mechanistic picture.