dc.contributor |
Ministerio de Economía y Competitividad (Espanya) |
dc.contributor.author |
Meconi, Giulia Magi |
dc.contributor.author |
Vummaleti, Sai Vikrama Chaitanya |
dc.contributor.author |
Luque Urrutia, Jesús Antonio |
dc.contributor.author |
Belanzoni, Paola |
dc.contributor.author |
Nolan, Steven P. |
dc.contributor.author |
Jacobsen, Heiko |
dc.contributor.author |
Cavallo, Luigi |
dc.contributor.author |
Solà i Puig, Miquel |
dc.contributor.author |
Poater Teixidor, Albert |
dc.date |
2017-09-05T08:48:19Z |
dc.date |
2017-05-24 |
dc.date |
info:eu-repo/date/embargoEnd/2018-05-24 |
dc.identifier.citation |
0276-7333 (versió paper) |
dc.identifier.citation |
1520-6041 (versió electrònica) |
dc.identifier.uri |
http://hdl.handle.net/10256/14359 |
dc.format |
application/pdf |
dc.language.iso |
eng |
dc.publisher |
American Chemical Society (ACS) |
dc.relation |
https://doi.org/10.1021/acs.organomet.7b00114 |
dc.relation |
MINECO/PE 2015-2018/CTQ2014-59832-JIN |
dc.relation |
MINECO/PE 2015-2017/CTQ2014-54306-P |
dc.relation |
Versió postprint del document publicat a: 10.1021/acs.organomet.7b00114 |
dc.relation |
© Organometallics, 2017, vol. 36, núm. 11, p. 2088-2095 |
dc.relation |
Articles publicats (D-Q) |
dc.rights |
Tots els drets reservats |
dc.rights |
info:eu-repo/semantics/embargoedAccess |
dc.subject |
Funcional de densitat, Teoria del |
dc.subject |
Density functionals |
dc.subject |
Activació (Química) |
dc.subject |
Activation (Chemistry) |
dc.subject |
Catàlisi |
dc.subject |
Catalysis |
dc.title |
Mechanism of the suzuki-miyaura cross-coupling reaction mediated by [Pd(NHC)(allyl)Cl] Precatalysts |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/acceptedVersion |
dc.description.abstract |
El títol de la versió original de l'article és: "The reaction mechanism of the Suzuki-Miyaura cross-coupling reac-tion. The role of the precatalyst activation" |
dc.description.abstract |
Density functional theory calculations have been used to investigate the activation mechanism for the precatalyst series [Pd]-X-1-4 derived from [Pd(IPr)(R-allyl)X] species by substitutions at the terminal position of the allyl moiety ([Pd] = Pd(IPr); R = H (1), Me (2), gem-Me 2 (3), Ph (4), X = Cl, Br). Next, we have investigated the Suzuki-Miyaura cross-coupling reaction for the active catalyst species IPr-Pd(0) using 4-chlorotoluene and phenylboronic acid as substrates and isopropyl alcohol as a solvent. Our theoretical findings predict an upper barrier trend, corresponding to the activation mechanism for the [Pd]-Cl-1-4 series, in good agreement with the experiments. They indeed provide a quantitative explanation of the low yield (12%) displayed by [Pd] -Cl-1 species (G 30.0 kcal/mol) and of the high yields (90%) observed in the case of [Pd]-Cl-2-4 complexes (G 20.0 kcal/mol). Additionally, the studied Suzuki-Miyaura reaction involving the IPr-Pd(0) species is calculated to be thermodynamically favorable and kinetically facile. Similar investigations for the [Pd] -Br-1-4 series, derived from [Pd(IPr)(R-allyl)Br], indicate that the oxidative addition step for IPr-Pd(0)-mediated catalysis with 4-bromotoluene is kinetically more favored than that with 4-chlorotoluene. Finally, we have explored the potential of Ni-based complexes [Ni((IPr)(R-allyl)X] (X = Cl, Br) as Suzuki-Miyaura reaction catalysts. Apart from a less endergonic reaction energy profile for both precatalyst activation and catalytic cycle, a steep increase in the predicted upper energy barriers (by 2.0-15.0 kcal/mol) is calculated in the activation mechanism for the [Ni]-X-1-4 series compared to the [Pd] -X-1-4 series. Overall, these results suggest that Ni-based precatalysts are expected to be less active than the Pd-based precatalysts for the studied Suzuki-Miyaura reaction |
dc.description.abstract |
A.P. thanks the Spanish MINECO for a project CTQ2014-59832-JIN. M.S. thanks EU for a FEDER fund (UNGI08-4E-003), the Generalitat de Catalunya for project 2014SGR931 and ICREA Academia 2014 prize, and MINECO of Spain through project CTQ2014-54306-P |