Ligand-Metal Cooperation in PCP Pincer Complexes: Rational Design and Catalytic Activity in Acceptorless Dehydrogenation of Alcohols

2011 ◽  
Vol 123 (15) ◽  
pp. 3595-3599 ◽  
Author(s):  
Sanaa Musa ◽  
Irina Shaposhnikov ◽  
Shmuel Cohen ◽  
Dmitri Gelman
2013 ◽  
Vol 32 (10) ◽  
pp. 3069-3073 ◽  
Author(s):  
Sanaa Musa ◽  
Sveta Fronton ◽  
Luigi Vaccaro ◽  
Dmitri Gelman

Author(s):  
Hans C. Hendrikse ◽  
Alejo Aguirre ◽  
Arno van der Weijden ◽  
Anne S. Meeussen ◽  
Fernanda Neira D’Angelo ◽  
...  

2019 ◽  
Vol 126 ◽  
pp. 229-237 ◽  
Author(s):  
Naeem Mahmood Ashraf ◽  
Akshaya Krishnagopal ◽  
Aadil Hussain ◽  
David Kastner ◽  
Ahmed Mahmoud Mohammed Sayed ◽  
...  

2020 ◽  
Author(s):  
Joel D. Smith ◽  
George Durrant ◽  
Daniel Ess ◽  
Warren Piers

<div>The synthesis and characterization of an iridium polyhydride complex (Ir-H4)</div><div>supported by an electron-rich PCP framework is described. This complex readily loses molecular</div><div>hydrogen allowing for rapid room temperature hydrogen isotope exchange (HIE) at the hydridic</div><div>positions and the α-C-H site of the ligand with deuterated solvents such as benzene-d6, toluene-d8</div><div>and THF-d8. The removal of 1-2 equivalents of molecular H2 forms unsaturated iridium carbene</div><div>trihydride (Ir-H3) or monohydride (Ir-H) compounds that are able to create further unsaturation</div><div>by reversibly transferring a hydride to the ligand carbene carbon. These species are highly active</div><div>hydrogen isotope exchange (HIE) catalysts using C6D6 or D2O as deuterium sources for the</div><div>deuteration of a variety of substrates. By modifying conditions to influence the Ir-Hn speciation,</div><div>deuteration levels can range from near exhaustive to selective only for sterically accessible sites.</div><div>Preparative level deuterations of select substrates were performed allowing for procurement of</div><div>>95% deuterated compounds in excellent isolated yields; the catalyst can be regenerated by</div><div>treatment of residues with H2 and is still active for further reactions.</div>


2018 ◽  
Vol 1 (3) ◽  
pp. 1150-1163 ◽  
Author(s):  
Wei Cai ◽  
Qin Zhong ◽  
Dongyu Wang ◽  
Yunxia Zhao ◽  
Mindong Chen ◽  
...  

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