0000000001299533

AUTHOR

Alex J. Veinot

showing 13 related works from this author

Mono‐ and Bis(imidazolidinium ethynyl) Cations and Reduction of the Latter To Give an Extended Bis‐1,4‐([3]Cumulene)‐p-carboquinoid System

2017

An extended π-system containing two [3]cumulene fragments separated by a p-carboquinoid and stabilized by two capping N-heterocyclic carbenes (NHCs) has been prepared. Mono- and bis(imidazolidinium ethynyl) cations have also been synthesized from the reaction of an NHC with phenylethynyl bromide or 1,4-bis(bromoethynyl)benzene. Cyclic voltammetry coupled with synthetic and structural studies showed that the dication is readily reduced to a neutral, singlet bis-1,4-([3]cumulene)-p-carboquinoid as a result of the π-accepting properties of the capping NHCs. peerReviewed

cumulenes010405 organic chemistryreductionGeneral MedicineN-heterocyclic carbenes010402 general chemistryalkynes01 natural sciencespropargyl cations0104 chemical sciences3. Good health
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Synthesis and properties of an Au6 cluster supported by a mixed N-heterocyclic carbene–thiolate ligand

2020

The preparation of a novel Au6 cluster bearing a bidentate mixed carbene–thiolate ligand is presented. The length of linker between the central benzimidazole and thiolate has a strong effect on the formation of cluster products, with a C2 chain giving an Au6 cluster, while a C3 chain results in no evidence of cluster formation. Density functional theory analysis predicts a non-metallic cluster with a large HOMO–LUMO (3.2–3.6 eV) and optical gap.

BenzimidazoleDenticity010405 organic chemistryLigandMetals and AlloysGeneral Chemistry010402 general chemistry01 natural sciencesCatalysis0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialschemistry.chemical_compoundCrystallographychemistryChain (algebraic topology)Materials ChemistryCeramics and CompositesCluster (physics)Density functional theoryCarbeneLinkerChemical Communications
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Mono‐ and Bis(imidazolidinium ethynyl) Cations and Reduction of the Latter To Give an Extended Bis‐1,4‐([3]Cumulene)‐ p ‐carboquinoid System

2018

An extended π-system containing two [3]cumulene fragments separated by a p-carboquinoid and stabilized by two capping N-heterocyclic carbenes (NHCs) has been prepared. Mono- and bis(imidazolidinium ethynyl) cations have also been synthesized from the reaction of an NHC with phenylethynyl bromide or 1,4-bis(bromoethynyl)benzene. Cyclic voltammetry coupled with synthetic and structural studies showed that the dication is readily reduced to a neutral, singlet bis-1,4-([3]cumulene)-p-carboquinoid as a result of the π-accepting properties of the capping NHCs.

010405 organic chemistryCumuleneGeneral Chemistry010402 general chemistryPhotochemistry01 natural sciencesMedicinal chemistryCatalysis0104 chemical sciences3. Good healthDicationchemistry.chemical_compoundchemistryBromideX-ray crystallographySinglet stateCyclic voltammetryBenzeneAngewandte Chemie International Edition
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NHC-Stabilized Au10 Nanoclusters and Their Conversion to Au25 Nanoclusters

2022

Herein, we describe the synthesis of a toroidal Au10 cluster stabilized by N-heterocyclic carbene and halide ligands via reduction of the corresponding NHC−Au−X complexes (X = Cl, Br, I). The significant effect of the halide ligands on the formation, stability, and further conversions of these clusters is presented. While solutions of the chloride derivatives of Au10 show no change even upon heating, the bromide derivative readily undergoes conversion to form a biicosahedral Au25 cluster at room temperature. For the iodide derivative, the formation of a significant amount of Au25 was observed even upon the reduction of NHC−Au−I. The isolated bromide derivative of the Au25 cluster displays a…

absorptiometal clustersanionitligandsnanohiukkasetliganditgoldanionsabsorptionkulta
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CCDC 1549500: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

2-{[4-(chloroethynyl)phenyl]ethynyl}-13-bis[26-bis(propan-2-yl)phenyl]-45-dihydro-1H-imidazol-3-ium 2-{[4-(bromoethynyl)phenyl]ethynyl}-13-bis[26-bis(propan-2-yl)phenyl]-45-dihydro-1H-imidazol-3-ium tetraphenylborate dichloromethane solvateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1549501: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters22'-[cyclohexa-25-diene-14-diylidenebis(ethene-21-diylidene)]bis{13-bis[26-bis(propan-2-yl)phenyl]imidazolidine}Experimental 3D Coordinates
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CCDC 1549502: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters13-bis[26-bis(propan-2-yl)phenyl]-2-(phenylethynyl)-45-dihydro-1H-imidazol-3-ium hexafluorophosphate dichloromethane solvateExperimental 3D Coordinates
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CCDC 1985367: Experimental Crystal Structure Determination

2020

Related Article: Kirsi Salorinne, Renee W. Y. Man, Paul A. Lummis, Maryam Sabooni Asre Hazer, Sami Malola, Jacky C.-H. Yim, Alex J. Veinot, Wenxia Zhou, Hannu Häkkinen, Masakazu Nambo, Cathleen M. Crudden|2020|Chem.Commun.|56|6102|doi:10.1039/D0CC01482F

Space GroupCrystallographyCrystal SystemCrystal Structure{1-[2-(acetylsulfanyl)ethyl]-3-isopropylbenzimidazol-2-ylidene}-bromo-gold(i)Cell ParametersExperimental 3D Coordinates
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CCDC 1549499: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

Space GroupCrystallographyCrystal System22'-(14-phenylenedi(ethyne-21-diyl))bis(13-bis[26-di(propan-2-yl)phenyl]-45-dihydro-1H-imidazol-3-ium) bis(bromide) dichloromethane solvate dihydrateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1549503: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

Space GroupCrystallography13-bis[26-bis(propan-2-yl)phenyl]-2-[(4-fluorophenyl)ethynyl]-45-dihydro-1H-imidazol-3-ium hexafluorophosphate dichloromethane solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1985364: Experimental Crystal Structure Determination

2020

Related Article: Kirsi Salorinne, Renee W. Y. Man, Paul A. Lummis, Maryam Sabooni Asre Hazer, Sami Malola, Jacky C.-H. Yim, Alex J. Veinot, Wenxia Zhou, Hannu Häkkinen, Masakazu Nambo, Cathleen M. Crudden|2020|Chem.Commun.|56|6102|doi:10.1039/D0CC01482F

Space GroupCrystallographytetrakis(mu-1-isopropyl-3-(2-thiolatoethyl)benzimidazol-2-ylidene)-hexa-gold bis(hexafluorophosphate) ethanol solvate monohydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1549498: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

Space GroupCrystallographyCrystal System13-bis[26-bis(propan-2-yl)phenyl]-2-(phenylethynyl)-45-dihydro-1H-imidazol-3-ium bromide toluene solvateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1549504: Experimental Crystal Structure Determination

2017

Related Article: Brian M. Barry, R. Graeme Soper, Juha Hurmalainen, Akseli Mansikkamäki, Katherine N. Robertson, William L. McClennan, Alex J. Veinot, Tracey L. Roemmele, Ulrike Werner-Zwanziger, René T. Boeré, Heikki M. Tuononen, Jason A. C. Clyburne, Jason D. Masuda|2018|Angew.Chem.,Int.Ed.|57|749|doi:10.1002/anie.201711031

Space GroupCrystallographyCrystal SystemCrystal Structure2-[([11'-biphenyl]-4-yl)ethynyl]-13-bis[26-bis(propan-2-yl)phenyl]-45-dihydro-1H-imidazol-3-ium bromide dichloromethane solvateCell ParametersExperimental 3D Coordinates
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