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Résumé We introduce the theory of the analytic de Rham stack and the Hyodo Kato stacks. We then sketch the main ideas behind a new interpretation and proof of the local p-adic monodromy …

Résumé La substitution nucléophile sur un centre carboné sp³ constitue l’une des transformations les plus fondamentales et les plus utilisées en chimie organique. Si l’issue stéréochimique d’une réaction SN2 est bien connue – elle s’opère avec inversion …

Résumé La bonne santé du vivant, humain comme non humain, est avant tout la synthèse des conditions environnementales auxquelles celui-ci est exposé. Or, maintes menaces sanitaires se profilent à l'horizon : transmission accélérée de maladies infectieuses …

Résumé Cette séance explore la question de la révolution en dépassant une lecture strictement politique pour envisager aussi ses dimensions culturelles et intellectuelles. La révolution est ici pensée non seulement comme un bouleversement des structures …

Résumé Ardashīr I, in the third century claimed to be the king of the Iranians, and by the time of Shapur I the realm was known as Ērānšahr , i.e., the “Empire of the Iranians.” During the Sasanian period, not only the idea of Iran took form, but its …

Résumé Electrochemical reduction of carbon dioxide can yield valuable chemicals, energy carriers, and renewable fuels that serve as storage forms of renewable energy. This transformation can be achieved using molecular catalysts immobilized on conductive …

Résumé Activation of carbene precursors by planar, low-spin cobalt(II) complexes leads to formation of ‘carbene radical’ intermediates. 1 These are intrinsically reactive metal-bound carbon radicals (Figure 1), useful for catalytic synthesis of a variety …

Résumé Polyoxometalates (POMs) form a versatile family of molecular oxide clusters of the early transition metals endowed with exceptional redox properties, which have driven applications in photo/electro-catalysis, photo/electro-chromic materials, energy …

Résumé Activation of small molecules by donor-acceptor systems is conceptually important as many catalytic processes rely on the synergistic action of electron-rich and -poor sites to cooperatively activate and cleave bonds. This pertains to both the …

Résumé Over the past 20 years, significant research has been directed toward the development of new methodologies for synthetic efficiency and atom economy processes in the presence of gold complexes. 1 We have been initially engaged in a wide project …

Résumé Part I  – Our approach to cross-coupling uses sulfoxides to activate substrates as sulfonium salts. In particular, sulfonium salts, generated from arenes, 1  and new sulfonium salts generated from alternative feedstocks, 2 can be exploited in …

Résumé Visible-light photoredox catalysis provides powerful opportunities for redox transformations under mild conditions;1 however, the development of efficient, low-cost, and metal-free photocatalysts remains a central challenge.1b In this talk, I will …

Résumé Electron transfer-mediated functionalizations present new avenues for the construction of carbon–carbon and carbon–heteroatom bonds from readily available and abundant feedstocks. We have been developing new photocatalytic systems as versatile …

Résumé IUPAC defines a "mechano-chemical reaction" as a "chemical reaction that is induced by the direct absorption of mechanical energy". 1 We investigated a wide range of organic reactions and found that ball milling can affect the oxidation states of …