Results 201 to 210 of about 27,451 (245)
Some of the next articles are maybe not open access.
Dynamics of Carbene Cycloadditions
Journal of the American Chemical Society, 2011Quasiclassical trajectory calculations using quantum mechanical energies and forces generated by the Venus and Gaussian programs provide for the first time a detailed dynamical picture of singlet carbene, CCl(2) and CF(2), cycloadditions to alkenes on the B3LYP/6-31G* surface.
Lai, Xu, Charles E, Doubleday, K N, Houk
openaire +2 more sources
Cycloaddition of Fluorinated Oxazoles.
ChemInform, 2005AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
N. V. Vasil'ev +5 more
openaire +1 more source
Chemical Reviews, 2016
Cycloadditions are among the most efficient chemical processes, combining atom economy, stereospecificity, and the ability to generate molecular complexity in a single step. Aromatic rings would in principle be ideal reaction partners, as they contain, at least from the topological point of view, both olefinic and diene subunits; however, the stability
Remy Richard, Bochet Christian G
openaire +2 more sources
Cycloadditions are among the most efficient chemical processes, combining atom economy, stereospecificity, and the ability to generate molecular complexity in a single step. Aromatic rings would in principle be ideal reaction partners, as they contain, at least from the topological point of view, both olefinic and diene subunits; however, the stability
Remy Richard, Bochet Christian G
openaire +2 more sources
Cycloadditions with Metauo-Phosphaalkenes
Phosphorus, Sulfur, and Silicon and the Related Elements, 1994Abstract Cycloadditions of metallo-phosphaalkenes such as (C5Me5)(C0)2Fe− P=CR1R2 (R1 = R2 = SiMe3, NMe2; R1 = Ph, R2 = SiMe3) are performed with isocyanides, electron-poor alkenes, alkynes and heteroal ...
Weber, Lothar +2 more
openaire +1 more source
Retro‐Cycloaddition Reaction of Pyrrolidinofullerenes.
ChemInform, 2005AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Nazario, Martín +5 more
openaire +2 more sources
1994
Die thermische [2+2]Cycloaddition von Alkenen 1 ist nach den Woodward-Hoffmann-Regeln 1) suprafacial symmetrieverboten und kann nur in speziellen Fallen erfolgreich durchgefuhrt werden. Hingegen ist das photochemische Pendant erlaubt und wird als praparativ wertvolle Methode zur Bildung von Vierringsystemen 2 vielfaltig genutzt.2–4)
Thomas Laue, Andreas Plagens
openaire +1 more source
Die thermische [2+2]Cycloaddition von Alkenen 1 ist nach den Woodward-Hoffmann-Regeln 1) suprafacial symmetrieverboten und kann nur in speziellen Fallen erfolgreich durchgefuhrt werden. Hingegen ist das photochemische Pendant erlaubt und wird als praparativ wertvolle Methode zur Bildung von Vierringsystemen 2 vielfaltig genutzt.2–4)
Thomas Laue, Andreas Plagens
openaire +1 more source
Cycloadditions and Cycloreversions I. [2+2]-Cycloaddition
1992It was pointed out in the preceding chapter that correlation diagrams can be read from right to left as easily as from left to right. This is certainly true from the formal viewpoint of orbital symmetry, but does not preclude the need to examine the geometric and energetic consequences of the nuclear motions involved.
openaire +1 more source