Combined experimental and theoretical studies towards mutual osmium–bismuth donor/acceptor bonding

2020 ◽  
Vol 49 (26) ◽  
pp. 9024-9034
Author(s):  
Jacqueline Ramler ◽  
Krzysztof Radacki ◽  
Josh Abbenseth ◽  
Crispin Lichtenberg
Keyword(s):  
Pincer Complexes ◽  
Theoretical Studies ◽  
Donor Acceptor ◽  
Experimental And Theoretical Studies

Reactions of Os(ii) pincer complexes with Lewis acidic bismuth species have been studied experimentally and theoretically, revealing their potential for the formation of donor/acceptor bonding with Os → Bi and Os ← Bi components.

scholarly journals Experimental and theoretical studies of donor–acceptor scintillation from PbI2

2013 ◽  
Vol 134 ◽  
pp. 28-34 ◽  
Author(s):  
Stephen E. Derenzo ◽  
Edith Bourret-Courchesne ◽  
Zewu Yan ◽  
Gregory Bizarri ◽  
Andrew Canning ◽  
...  
Keyword(s):  
Theoretical Studies ◽  
Donor Acceptor ◽  
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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