Novolac-derived carbon aerogels pyrolyzed at high temperatures: experimental and theoretical studies

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72777-72790 ◽  
Author(s):  
Ahmad Allahbakhsh ◽  
Ahmad Reza Bahramian
Keyword(s):  
High Temperatures ◽  
Carbon Aerogels ◽  
Theoretical Studies ◽  
Experimental And Theoretical Studies

Microstructures and conductance performance of novolac-derived carbon aerogels, pyrolyzed at different carbonization temperatures, are investigated.

scholarly journals Experimental and theoretical studies of rate coefficients for the reaction O(P3)+CH3OH at high temperatures

2005 ◽  
Vol 122 (24) ◽  
pp. 244314 ◽  
Author(s):  
Chih-Wei Lu ◽  
Shen-Long Chou ◽  
Yuan-Pern Lee ◽  
Shucheng Xu ◽  
Z. F. Xu ◽  
...  
Keyword(s):  
High Temperatures ◽  
Rate Coefficients ◽  
Theoretical Studies ◽  
Experimental And Theoretical Studies

Experimental and Theoretical Studies of the Rate Coefficients of the Reaction O(3P) + HCl at High Temperatures

2002 ◽  
Vol 106 (43) ◽  
pp. 10231-10237 ◽  
Author(s):  
Chih-Chang Hsiao ◽  
Yuan-Pern Lee ◽  
Niann S. Wang ◽  
J. H. Wang ◽  
M. C. Lin
Keyword(s):  
High Temperatures ◽  
Rate Coefficients ◽  
Theoretical Studies ◽  
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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