“…Protocol (a): This protocol, consisting in reacting the complex Pd 2 (DBA) 3 ÁCHCl 3 [23] (DBA = dibenzyliden-acetone) with the appropriate ligand and olefin in anhydrous acetone under inert atmosphere, represents the first synthetic method [24,25] which is still widely employed [26]. It is noteworthy that the complex Pd 3 (TBAA) 3 ÁCHCl 3 [27] (TBAA = tribenzylidenacetyl-acetone) can be used as an alternative starting substrate [24].…”
Section: Synthesis Of the Palladium(0) Olefin Complexesmentioning
a b s t r a c tAn overview of the general features of electron-poor olefin stabilized palladium(0) complexes bearing labile and hemi-labile ancillary ligands is presented. In particular, we have summarized the synthetic methodologies, the ligands commonly used, and the characterization of such complexes. The behavior of these species in solution is also described with particular attention to their fluxional rearrangements and reactivity. Thus, olefin exchange reactions are described and a comprehensive order of coordinative capability of the most widely used electron-poor alkenes is presented. The reactions of the title complexes dealing with olefin isomerization, oxidative addition, and formation of palladacyclopentadiene derivatives are eventually reported together with their main structural characteristics.
“…Protocol (a): This protocol, consisting in reacting the complex Pd 2 (DBA) 3 ÁCHCl 3 [23] (DBA = dibenzyliden-acetone) with the appropriate ligand and olefin in anhydrous acetone under inert atmosphere, represents the first synthetic method [24,25] which is still widely employed [26]. It is noteworthy that the complex Pd 3 (TBAA) 3 ÁCHCl 3 [27] (TBAA = tribenzylidenacetyl-acetone) can be used as an alternative starting substrate [24].…”
Section: Synthesis Of the Palladium(0) Olefin Complexesmentioning
a b s t r a c tAn overview of the general features of electron-poor olefin stabilized palladium(0) complexes bearing labile and hemi-labile ancillary ligands is presented. In particular, we have summarized the synthetic methodologies, the ligands commonly used, and the characterization of such complexes. The behavior of these species in solution is also described with particular attention to their fluxional rearrangements and reactivity. Thus, olefin exchange reactions are described and a comprehensive order of coordinative capability of the most widely used electron-poor alkenes is presented. The reactions of the title complexes dealing with olefin isomerization, oxidative addition, and formation of palladacyclopentadiene derivatives are eventually reported together with their main structural characteristics.
“…Numerous investigations showed cated that it was a fluxional molecule on the NMR time scale. The 31 P{ 1 H}-NMR spectrum at room temperature that the nucleophilic substitution at palladium(II) complexes [17] and other square planar d 8 -complexes [18] follows ( Figure 2) revealed a broad singlet for the three phosphorus atoms of each of the two ligands. Due to rapid site exchange an associative mechanism through a five coordinate transition state.…”
“…Especially, compounds 3 (M = Pd) are excellent recoverable catalysts in certain C−C bond formation reactions such as Suzuki cross-couplings, 11a,c butadiene telomerization, hydroarylation of alkynes in ionic liquids, and Heck reactions . Olefins are good ligands for palladium(0), and in macrocycles 2 the three olefinic bonds are responsible for the coordination, the nitrogen atoms being devoid of any coordinating ability. 1 Structure of 15-membered triolefinic macrocyclic ligands 2 and their transition metal complexes 3 .…”
Molecular structures featuring two and three triolefinic 15-membered macrocycles of type
2 as well as their homo- and heterometallic complexes of palladium(0) and platinum(0) (5,
7) have been synthesized from 2,4,6-trichloro-1,3,5-triazine, 1. The strategy employed allows
easy preparation of heterobimetallic complexes in a controlled manner. Several mass
spectrometry techniques are useful to identify these complexes.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
