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Gramm VK, Stein I, Riesen E, Ruschewitz U. Li2ADC·2H2O and Li2ADC: Two new Coordination Polymers with the Acetylenedicarboxylate Dianion (ADC2-). Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201600363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Verena K. Gramm
- Department für Chemie; Institut für Anorganische Chemie; Universität zu Köln; Greinstraße 6 50939 Köln Germany
| | - Irena Stein
- Department für Chemie; Institut für Anorganische Chemie; Universität zu Köln; Greinstraße 6 50939 Köln Germany
| | - Elena Riesen
- Department für Chemie; Institut für Anorganische Chemie; Universität zu Köln; Greinstraße 6 50939 Köln Germany
| | - Uwe Ruschewitz
- Department für Chemie; Institut für Anorganische Chemie; Universität zu Köln; Greinstraße 6 50939 Köln Germany
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2
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Poad BLJ, Reed ND, Hansen CS, Trevitt AJ, Blanksby SJ, Mackay EG, Sherburn MS, Chan B, Radom L. Preparation of an ion with the highest calculated proton affinity: ortho-diethynylbenzene dianion. Chem Sci 2016; 7:6245-6250. [PMID: 30034765 PMCID: PMC6024202 DOI: 10.1039/c6sc01726f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 06/17/2016] [Indexed: 11/23/2022] Open
Abstract
![]() Owing to the increased proton affinity that results from additional negative charges, multiply-charged anions are shown as a route to preparing powerful ‘superbases’.
Owing to the increased proton affinity that results from additional negative charges, multiply-charged anions have been proposed as one route to prepare and access a range of new and powerful “superbases”. Paradoxically, while the additional electrons in polyanions increase basicity they serve to diminish the electron binding energy and thus, it had been thought, hinder experimental synthesis. We report the synthesis and isolation of the ortho-diethynylbenzene dianion (ortho-DEB2–) and present observations of this novel species undergoing gas-phase proton-abstraction reactions. Using a theoretical model based on Marcus–Hush theory, we attribute the stability of ortho-DEB2– to the presence of a barrier that prevents spontaneous electron detachment. The proton affinity of 1843 kJ mol–1 calculated for this dianion superbase using high-level quantum chemistry calculations significantly exceeds that of the lithium monoxide anion, the most basic system previously prepared. The ortho-diethynylbenzene dianion is therefore the strongest base that has been experimentally observed to date.
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Affiliation(s)
- Berwyck L J Poad
- Central Analytical Research Facility , Institute for Future Environments , Queensland University of Technology , Brisbane , QLD 4001 , Australia . .,School of Chemistry , University of Wollongong , Gwynneville , NSW 2522 , Australia
| | - Nicholas D Reed
- School of Chemistry , University of Wollongong , Gwynneville , NSW 2522 , Australia
| | - Christopher S Hansen
- School of Chemistry , University of Wollongong , Gwynneville , NSW 2522 , Australia
| | - Adam J Trevitt
- School of Chemistry , University of Wollongong , Gwynneville , NSW 2522 , Australia
| | - Stephen J Blanksby
- Central Analytical Research Facility , Institute for Future Environments , Queensland University of Technology , Brisbane , QLD 4001 , Australia .
| | - Emily G Mackay
- Research School of Chemistry , Australian National University , Canberra , ACT 2601 , Australia
| | - Michael S Sherburn
- Research School of Chemistry , Australian National University , Canberra , ACT 2601 , Australia
| | - Bun Chan
- School of Chemistry , University of Sydney , Sydney , NSW 2006 , Australia
| | - Leo Radom
- School of Chemistry , University of Sydney , Sydney , NSW 2006 , Australia
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3
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Chai Y, Shen S, Weng G, Pan Y. Gas-phase synthesis and reactivity of Cu+–benzyne complexes. Chem Commun (Camb) 2014; 50:11668-71. [DOI: 10.1039/c4cc04168b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu+–benzyne complexes bearing ligands (L) were synthesized and their addition reactivity was studied in the gas phase using electrospray ionization ion trap mass spectrometry.
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Affiliation(s)
- Yunfeng Chai
- Department of Chemistry
- Zhejiang University
- Hangzhou, China
| | - Shanshan Shen
- Department of Chemistry
- Zhejiang University
- Hangzhou, China
| | - Guofeng Weng
- Department of Chemistry
- Zhejiang University
- Hangzhou, China
| | - Yuanjiang Pan
- Department of Chemistry
- Zhejiang University
- Hangzhou, China
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4
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Affiliation(s)
| | - Steven R. Kass
- Department
of Chemistry, University of Minnesota,
Minneapolis, Minnesota 55455,
United States
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5
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Harris BL, Waters T, Khairallah GN, O’Hair RAJ. Gas-Phase Reactions of [VO2(OH)2]− and [V2O5(OH)]− with Methanol: Experiment and Theory. J Phys Chem A 2012; 117:1124-35. [PMID: 22889366 DOI: 10.1021/jp3046142] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin L. Harris
- School
of Chemistry, ‡Bio21 Institute of Molecular Science and Biotechnology, and §ARC Centre of
Excellence for Free Radical Chemistry and Biotechnology, The University of Melbourne, Melbourne,
Victoria 3010, Australia
| | - Tom Waters
- School
of Chemistry, ‡Bio21 Institute of Molecular Science and Biotechnology, and §ARC Centre of
Excellence for Free Radical Chemistry and Biotechnology, The University of Melbourne, Melbourne,
Victoria 3010, Australia
| | - George N. Khairallah
- School
of Chemistry, ‡Bio21 Institute of Molecular Science and Biotechnology, and §ARC Centre of
Excellence for Free Radical Chemistry and Biotechnology, The University of Melbourne, Melbourne,
Victoria 3010, Australia
| | - Richard A. J. O’Hair
- School
of Chemistry, ‡Bio21 Institute of Molecular Science and Biotechnology, and §ARC Centre of
Excellence for Free Radical Chemistry and Biotechnology, The University of Melbourne, Melbourne,
Victoria 3010, Australia
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6
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Sraj LO, Khairallah GN, da Silva G, O’Hair RAJ. Who Wins: Pesci, Peters, or Deacon? Intrinsic Reactivity Orders for Organocuprate Formation via Ligand Decomposition. Organometallics 2012. [DOI: 10.1021/om2011722] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lenka O’Connor Sraj
- School of Chemistry, Bio21 Institute
of Molecular Science and Biotechnology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - George N. Khairallah
- School of Chemistry, Bio21 Institute
of Molecular Science and Biotechnology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Gabriel da Silva
- Department of Chemical and Biomolecular, The University of Melbourne, Melbourne, Victoria 3010,
Australia
| | - Richard A. J. O’Hair
- School of Chemistry, Bio21 Institute
of Molecular Science and Biotechnology, The University of Melbourne, Melbourne, Victoria 3010, Australia
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7
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Schmidt J, Meyer MM, Spector I, Kass SR. Infrared Multiphoton Dissociation Spectroscopy Study of Protonated p-Aminobenzoic Acid: Does Electrospray Ionization Afford the Amino- or Carboxy-Protonated Ion? J Phys Chem A 2011; 115:7625-32. [DOI: 10.1021/jp203829z] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jacob Schmidt
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Matthew M. Meyer
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Ivan Spector
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Steven R. Kass
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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