Guy Bertrand
YOU?
Author Swipe
View article: A Crystalline Annelated Pyridin-1-ylidene and Its Isomerization into a Pyridin-3-ylidene
A Crystalline Annelated Pyridin-1-ylidene and Its Isomerization into a Pyridin-3-ylidene Open
An isolable ring-fused pyridinylidene (a so-called Hammick intermediate) was synthesized from a benzo[h]isoquinolinium salt, and its structure in the solid state was determined. The isolation of this first-of-its-kind pyridine-derived arom…
View article: Singlet Carbenes Are Stereoinductive Main Group Ambiphiles
Singlet Carbenes Are Stereoinductive Main Group Ambiphiles Open
Stereogenic units are a critical source of molecular complexity, but their stereoselective formation via main group ambiphiles─which are suitable for derivatizing a wide scope of functionalities─is largely unexplored. Herein, using chiral …
View article: Switching mesoionic carbene-organocatalysis from radical to ionic pathway through base-controlled formation of Breslow intermediates <i>versus</i> Breslow enolates
Switching mesoionic carbene-organocatalysis from radical to ionic pathway through base-controlled formation of Breslow intermediates <i>versus</i> Breslow enolates Open
Base-controlled formation of Breslow intermediates versus Breslow enolates has been achieved with mesoionic carbenes. Of particular interest is the coupling of aldehydes and alkyl halides to yield ketones via an ionic pathway.
View article: Genuine carbene versus carbene‐like reactivity
Genuine carbene versus carbene‐like reactivity Open
Singlet carbenes are not always isolable and often even elude direct detection. When they escape observation, their formation can sometimes be evidenced by in situ trapping experiments. However, is carbene‐like reactivity genuine evidence …
View article: Genuine carbene versus carbene‐like reactivity
Genuine carbene versus carbene‐like reactivity Open
Singlet carbenes are not always isolable and often even elude direct detection. When they escape observation, their formation can sometimes be evidenced by in situ trapping experiments. However, is carbene‐like reactivity genuine evidence …
View article: 1<i>H</i>-1,2,3-Triazol-5-ylidenes as Catalytic Organic Single-Electron Reductants
1<i>H</i>-1,2,3-Triazol-5-ylidenes as Catalytic Organic Single-Electron Reductants Open
Most of the known single-electron reductants are either metal based reagents, used in a stoichiometric amount, or a combination of an organic species and a photocatalyst. Here we report that 1H-1,2,3-triazol-5-ylidenes act not only as stoi…
View article: Ambiphilicity of ring-expanded N-heterocyclic carbenes
Ambiphilicity of ring-expanded N-heterocyclic carbenes Open
Contrasting with popular beliefs, experimental and theoretical data show that some N-heterocyclic carbenes (NHCs), especially the seven and eight membered rings NHCs, are very ambiphilic.
View article: Synthesis of enantiopure 1,2,3-triazolylidene-type mesoionic carbene (MIC) conjugate acids featuring a rigid bicyclic scaffold
Synthesis of enantiopure 1,2,3-triazolylidene-type mesoionic carbene (MIC) conjugate acids featuring a rigid bicyclic scaffold Open
Chiral NHCs have found numerous applications as ligands for transition metals and in their own right for asymmetric catalysis. We report a synthetic route from l -malic acid to enantiopure 1,2,3-triazoliums with the chiral center in a fuse…
View article: Cyclic (amino)(barrelene)carbene Ru-complexes: synthesis and reactivity in olefin metathesis
Cyclic (amino)(barrelene)carbene Ru-complexes: synthesis and reactivity in olefin metathesis Open
The first cyclic (amino)(barrelene)carbene (CABC) Ru-complexes were synthesized. They demonstrated remarkable thermal stability at 110 °C and good performance in olefin metathesis.
View article: A carbene-stabilized diphosphorus: a triple-bonded diphosphorus (PP) and a bis(phosphinidene) (P–P) transfer agent
A carbene-stabilized diphosphorus: a triple-bonded diphosphorus (PP) and a bis(phosphinidene) (P–P) transfer agent Open
The bis-monosubstituted aminocarbene-P 2 adduct is a generator of P 2 , under the classical triple-bonded form (PP), but it also acts as a bis(phosphinidene) (P–P) synthetic equivalent.
View article: “Quick-Silver” from a Systematic Study of Highly Luminescent, Two-Coordinate, d10 Coinage Metal Complexes
“Quick-Silver” from a Systematic Study of Highly Luminescent, Two-Coordinate, d10 Coinage Metal Complexes Open
A systematic study\nis presented on the physical and photophysical\nproperties of isoelectronic and isostructural Cu, Ag, and Au complexes\nwith a common amide (N-carbazolyl) and two different carbene ligands\n(i.e., CAAC = (5R,6S)-2-(2,6-…
View article: CCDC 2267007: Experimental Crystal Structure Determination
CCDC 2267007: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2245611: Experimental Crystal Structure Determination
CCDC 2245611: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2245613: Experimental Crystal Structure Determination
CCDC 2245613: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2245612: Experimental Crystal Structure Determination
CCDC 2245612: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2267374: Experimental Crystal Structure Determination
CCDC 2267374: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: A Crystalline Doubly Oxidized Carbene
A Crystalline Doubly Oxidized Carbene Open
Carbon is the quintessential element of life. The chemistry of carbon is governed by the octet rule, which refers to its ten-dency to have eight electrons in its valence shell. However, a few exceptions do exist. More than a century ago, G…
View article: Enhancing Substrate–Metal Catalyst Affinity via Hydrogen Bonding: Pd(II)-Catalyzed β-C(sp<sup>3</sup>)–H Bromination of Free Carboxylic Acids
Enhancing Substrate–Metal Catalyst Affinity via Hydrogen Bonding: Pd(II)-Catalyzed β-C(sp<sup>3</sup>)–H Bromination of Free Carboxylic Acids Open
The achievement of sufficient substrate-metal catalyst affinity is a fundamental challenge for the development of synthetically useful C-H activation reactions of weakly coordinating native substrates. While hydrogen bonding has been harne…
View article: CCDC 2252188: Experimental Crystal Structure Determination
CCDC 2252188: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers
Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers Open
Organic circularly polarized luminescence (CPL)‐active molecular emitters featuring dynamic propeller‐like luminophores were prepared in one step from cyclic(alkyl)(amino) carbenes (CAACs). These molecules exhibit through‐space arene‐arene…
View article: Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers
Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers Open
Organic circularly polarized luminescence (CPL)‐active molecular emitters featuring dynamic propeller‐like luminophores were prepared in one step from cyclic(alkyl)(amino) carbenes (CAACs). These molecules exhibit through‐space arene‐arene…
View article: CCDC 2205188: Experimental Crystal Structure Determination
CCDC 2205188: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2205189: Experimental Crystal Structure Determination
CCDC 2205189: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2205186: Experimental Crystal Structure Determination
CCDC 2205186: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2205190: Experimental Crystal Structure Determination
CCDC 2205190: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2205191: Experimental Crystal Structure Determination
CCDC 2205191: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …