Chemical and physical properties of fluorenylidene: equilibration of the singlet and triplet carbenes
作者:Peter B. Grasse、Beth Ellen Brauer、Joseph J. Zupancic、Kenneth J. Kaufmann、Gary B. Schuster
DOI:10.1021/ja00361a014
日期:1983.11
Formationde fluorenylidene par photolyse laser pulsee de diazo-9 fluorene a temperature ambiante ou a 10 K. Espece a l'etat d'equilibre entre carbenes singulet et triplet. Reactions du fluorenylidene avec l'acetonitrile, le cyclohexane et divers alcools et olefines. Spectres d'absorption visible. Mecanismes. Produits de cyclopropanation
形成 de fluorenylidene par 光解激光脉冲 de diazo-9 芴 a 温度 ambiante ou a 10 K. Espece a l'etat d'equilibre entre carbenes singulet et 三重峰。反应 du fluorenylidene avec l'乙腈、le 环己烷和 divers alcools 和烯烃。幽灵d'吸收可见。机制。环丙烷化产品
Direct Comparison of the Reactivity of Model Complexes for Compounds 0, I, and II in Oxygenation, Hydrogen-Abstraction, and Hydride-Transfer Processes
作者:Christoph Fertinger、Natalya Hessenauer-Ilicheva、Alicja Franke、Rudi van Eldik
DOI:10.1002/chem.200901804
日期:2009.12.14
derived from a single model complex, the results of these kinetic measurements provide for the first time a full comparability of the determined rateconstants for the three intermediates. The rateconstants reveal a significant dependence of the reactivity on the type of reaction (e.g., oxygenation, hydrogen abstraction, or hydride transfer), which closely correlates with the chemical nature of Cpds 0
Generation and Reactivity toward Oxygen of Carbon-Centered Radicals Containing Indane, Indene, and Fluorenyl Moieties
作者:Enrique Font-Sanchis、Carolina Aliaga、Elena V. Bejan、Raecca Cornejo、J. C. Scaiano
DOI:10.1021/jo026666o
日期:2003.4.1
than steric effects in determining the low radical reactivity with oxygen. Scavenging by the nitroxide TEMPO was also examined, and revealed that in this case steric effects are more important than in the case of oxygen. The rate constants for the hydrogen abstraction by cumyloxyl and tert-butoxyl radicalsgenerated thermally and photochemically have been determined in benzene, and were in the range
C−H Activation by a Mononuclear Manganese(III) Hydroxide Complex: Synthesis and Characterization of a Manganese-Lipoxygenase Mimic?
作者:Christian R. Goldsmith、Adam P. Cole、T. Daniel P. Stack
DOI:10.1021/ja039283w
日期:2005.7.13
chemistry. Thermodynamic analysis of [Mn(III)(PY5)(OH)](2+) and the reduced product, [Mn(II)(PY5)(H(2)O)](2+), estimates the strength of the O-H bond in the metal-bound water in the Mn(II) complex to be 82 (+/-2) kcal mol(-)(1), slightly less than that of the O-H bond in the related reduced ironcomplex, [Fe(II)(PY5)(MeOH)](2+). [Mn(III)(PY5)(OH)](2+) reacts with hydrocarbon substrates at rates comparable
Indirect observation of spin polarization in triplet fluorenylidene at room temperature
作者:William S. Jenks、Nicholas J. Turro
DOI:10.1016/s0040-4039(01)80720-6
日期:1989.1
The spin polarization of triplet fluorenylidene has been observed indirectly at room temperature via CIDEP spectroscopy. The observed absorptive polarization is in agreement with direct observations of the spin polarization of diphenylmethylene at lowtemperature.