Results 191 to 200 of about 35,108 (280)

2,3‐Diboratabutadiene Complexes of Group 4 Metals and their Donor‐Induced Oxidative Cleavage to Methyleneboranes

ChemistryEurope, EarlyView.
GA: We here report the first perarylated 2,3‐diboratabutadiene dianion and its reaction with Cp2MCl2 (M = Zr, Hf) to afford unprecedented 2,3‐diboratabutadiene π‐complexes with unique coordination modes. Addition of an N‐heterocyclic carbene (NHC) to the complexes gives rise to the donor‐induced oxidation of the BB bond, resulting in two separate NHC ...
Philipp Grewelinger, Carsten Präsang, Bernd Morgenstern, David Scheschkewitz   +3 more
wiley   +1 more source

One-Pot Syntheses and Characterization of Group VI Carbonyl NHC Coordination Compounds. [PDF]

Molecules
Stopar Z, Gruden E, Tramšek M, Tavčar G.   +3 more
europepmc   +1 more source

Evidences of the Stabilization for Weeks of the Benzyl Cation in Zeolites

ChemistryEurope, EarlyView.
The benzyl cation is plausibly formed inside zeolites after rearrangement of individually isolated tropylium cations at room temperature. The benzyl cation–entrapped zeolite is stable for weeks without any storage precaution, and a solid–state 13C nuclear magnetic resonance spectrum of this iconic carbocation could be recorded.
Francesco Orlando, Raúl Pérez–Ruíz, German Sastre, Antonio Leyva−Pérez   +3 more
wiley   +1 more source

Iridium porphyrin-catalysed asymmetric carbene insertion into primary N-adjacent C-H bonds with TON over 1000000. [PDF]

Nat Commun
Li ZR, Zhan K, Wang YJ, Wu LL, Lu GL, Wang HY, Wan XL, Xu ZJ, Low KH, Che CM.   +9 more
europepmc   +1 more source

The Versatility of Diazirines: Properties, Synthetic and Modern Applications

Chemistry – A European Journal, EarlyView.
Diazirines are 3‐membered heterocycles containing two nitrogen atoms connected by a double bond. They possess a multi‐faceted reactivity that holds great potential for organic synthesis. This review discusses their properties, modes of activation, and their many modern uses, underlining their underappreciated versatility: as carbene precursors, but ...
Mathieu L. Lepage, Emmanuel Gras
wiley   +1 more source

Rh(I)-Catalyzed Modular Synthesis of Axially Chiral Alkylidene Azacycloalkanes. [PDF]

ACS Cent Sci
Chen Y, Chen J, Zhu S.
europepmc   +1 more source

Enhanced Reactivity of N‐heterocyclic Halophosphines and Phosphenium Cations: The Activation of Carbon─Heteroatom and Boron─Heteroatom Bonds

Chemistry – A European Journal, EarlyView.
Novel class of saturated NHPs with phosphoramidothioate substituents exhibit enhanced reactivity in photoinitiated transfer hydrogenation reactions and activate C─O, B─H, B─C, and B─F bonds via phosphenium cation formation. Abstract N‐heterocyclic phosphines (NHPs), and especially their ionic derivatives, phosphenium cations, have gained significant ...
Maksim A. Samsonov, Jan Vrána, Petr Švec, Vlastimil Němec, Eliška Procházková, Josef Cvačka, Aleš Růžička   +6 more
wiley   +1 more source

Chiral iron porphyrin (+)-D₄-(por)FeCl catalyzes highly enantioselective cyclopropanation of alkenes using <i>in situ</i> generated diazoacetonitrile with up to 35 000 product turnover. [PDF]

Chem Sci
Tan HC, Shing KP, Wang HH, Liu Y, Che CM.   +4 more
europepmc   +1 more source

Chemical Properties of an Aryloxenium Cation with a Triplet Electronic Ground State

Chemistry – A European Journal, Accepted Article.
Aryloxenium cations contain a formally positively‐charged, monovalent oxygen atom with an incomplete electron shell. In spite of this unusual structural element, they are key intermediates in many important processes, such as biological oxidation reactions and the industrial generation of thermoplastics.
Tuong V. Nguyen, John J. Nash, Hilkka Kenttamaa   +2 more
wiley   +1 more source

Novel Au(I)- and Ag(I)-NHC Complexes with <i>N</i>-Boc-Protected Proline as Potential Candidates for Neurodegenerative Disorders. [PDF]

Int J Mol Sci
Ceramella J, D'Amato A, Procopio F, Mariconda A, Chavarria D, Iacopetta D, Ortuso F, Longo P, Borges F, Sinicropi MS.   +9 more
europepmc   +1 more source