Reaction between RuCl(PPh) and 1,2-diphenylhydrazine resulted in rearrangement and coordination of -semidine. The product, RuCl(PPh)(κ-NH-1,2-CH-NHPh), was characterized spectroscopically and the molecular structure was conclusively determined using X-ray crystallography. Computational chemistry was employed to probe the energetics surrounding the rearrangement reaction and product.
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http://dx.doi.org/10.1039/d2cc04500a | DOI Listing |
Molecules
November 2024
School of Chemistry, University College Dublin, Belfield, D04 V1W8 Dublin 4, Ireland.
Alkynylallenes offer the varied reactivity patterns of two different multiple bond linkages either separately or in concert. Initially, a short overview of their syntheses, structures, rearrangement mechanisms and synthetic utility, especially when treated with transition metal reagents such as gold(I), silver(I), platinum metals or metal carbonyls, is presented. Subsequently, we focus on the particular case of 1,2-dien-5-ynes (propargylallenes), whereby the shortness of the single atom bridge, and the consequent proximity of the allenyl and alkynyl moieties, facilitates metal-mediated interactions between them.
View Article and Find Full Text PDFChemistry
November 2023
Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany.
Aroyl-S,N-ketene acetals represent a peculiar class of heterocyclic merocyanines, compounds bearing pronounced and rather short dipoles with great push-pull characteristics that define their rich properties. They are accessible via a wide array of synthetic concepts and procedures, ranging from addition-elimination and condensation procedures up to rearrangement and metal-mediated reactions. With our work from 2020, aroyl-S,N-ketene acetals have been identified as powerful and promising dyes with pronounced and vastly tunable solid-state emission and aggregation-induced emission properties.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
August 2023
EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
We report a cobalt-catalyzed Wagner-Meerwein rearrangement of gem-disubstituted allylarenes that generates fluoroalkane products with isolated yields up to 84 %. Modification of the counteranion of the N-fluoropyridinium oxidant suggests the substrates undergo nucleophilic fluorination during the reaction. Subjecting the substrates to other known metal-mediated hydrofluorination procedures did not lead to observable 1,2-aryl migration.
View Article and Find Full Text PDFChem Commun (Camb)
October 2022
Air Force Research Laboratory, Aerospace Systems Directorate, Edwards AFB, California 93524, USA.
Reaction between RuCl(PPh) and 1,2-diphenylhydrazine resulted in rearrangement and coordination of -semidine. The product, RuCl(PPh)(κ-NH-1,2-CH-NHPh), was characterized spectroscopically and the molecular structure was conclusively determined using X-ray crystallography. Computational chemistry was employed to probe the energetics surrounding the rearrangement reaction and product.
View Article and Find Full Text PDFFaraday Discuss
May 2022
InSiliChem, Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
Molecular modelling applications in metalloenzyme design are still scarce due to a series of challenges. On top of that, the simulations of metal-mediated binding and the identification of catalytic competent geometries require both large conformational exploration and simulation of fine electronic properties. Here, we demonstrate how the incorporation of new tools in multiscale strategies, namely substrate diffusion exploration, allows taking a step further.
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