scholarly journals Mechanism of Resonant Two-photon TransitionsviaRepulsive Intermediate States. Experimental and Theoretical Studies on I2Vapor

1985 ◽  
Vol 58 (10) ◽  
pp. 2935-2942 ◽  
Author(s):  
Jun Shiraishi ◽  
Yuichi Fujimura ◽  
Takeshi Nakajima ◽  
Masahiro Kawasaki ◽  
Kazuo Kasatani ◽  
...  
Keyword(s):  
Theoretical Studies ◽  
Two Photon ◽  
Intermediate States ◽  
Experimental And Theoretical Studies

Novel Two-Photon Singlet Oxygen Photosensitizers: Experimental and Theoretical Studies of Numbers of Bromine Atoms Effect

2013 ◽  
Vol 17 (3) ◽  
pp. 310-324 ◽  
Author(s):  
Ziping Luo ◽  
Qinyuan Guo ◽  
Xiaojiao Liu ◽  
Xiaojuan Ye ◽  
Hongru Li ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Theoretical Studies ◽  
Two Photon ◽  
Experimental And Theoretical Studies

One- and Two-Photon Absorption of a Spiropyran–Merocyanine System: Experimental and Theoretical Studies

2015 ◽  
Vol 119 (4) ◽  
pp. 1515-1522 ◽  
Author(s):  
Katarzyna Matczyszyn ◽  
Joanna Olesiak-Banska ◽  
Keitaro Nakatani ◽  
Pei Yu ◽  
N. Arul Murugan ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Theoretical Studies ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Experimental And Theoretical Studies

The Stabilizing Effect of Pre-Equilibria: A Trifluoromethyl Complex as CF2 Reservoir in Catalytic Olefin Difluorocarbenation

2020 ◽  
Author(s):  
Thomas Louis-Goff ◽  
Huu Vinh Trinh ◽  
Eileen Chen ◽  
Arnold L. Rheingold ◽  
Christian Ehm ◽  
...  
Keyword(s):  
High Selectivity ◽  
Side Reactions ◽  
Theoretical Studies ◽  
Attractive Feature ◽  
Catalyst Recovery ◽  
Wide Range ◽  
Stabilizing Effect ◽  
Experimental And Theoretical Studies

A new, efficient, catalytic difluorocarbenation of olefins to give 1,1-difluorocyclopropanes is presented. The catalyst, an organobismuth complex, uses TMSCF<sub>3</sub> as a stoichiometric difluorocarbene source. We demonstrate both the viability and robustness of this reaction over a wide range of alkenes and alkynes, including electron-poor alkenes, to generate the corresponding 1,1-difluorocyclopropanes and 1,1-difluorocyclopropenes. Ease of catalyst recovery from the reaction mixture is another attractive feature of this method. In depth experimental and theoretical studies showed that the key difluorocarbene-generating step proceeds through a bismuth non-redox synchronous mechanism generating a highly reactive free CF<sub>2</sub> in an endergonic pre-equilibrium. It is the reversibility when generating the difluorocarbene that accounts for the high selectivity, while minimizing CF<sub>2</sub>-recombination side-reactions.

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