1
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Chiral control of spin-crossover dynamics in Fe(II) complexes. Nat Chem 2022; 14:739-745. [PMID: 35618767 DOI: 10.1038/s41557-022-00933-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 03/14/2022] [Indexed: 11/08/2022]
Abstract
Iron-based spin-crossover complexes hold tremendous promise as multifunctional switches in molecular devices. However, real-world technological applications require the excited high-spin state to be kinetically stable-a feature that has been achieved only at cryogenic temperatures. Here we demonstrate high-spin-state trapping by controlling the chiral configuration of the prototypical iron(II)tris(4,4'-dimethyl-2,2'-bipyridine) in solution, associated for stereocontrol with the enantiopure Δ- or Λ-enantiomer of tris(3,4,5,6-tetrachlorobenzene-1,2-diolato-κ2O1,O2)phosphorus(V) (P(O2C6Cl4)3- or TRISPHAT) anions. We characterize the high-spin-state relaxation using broadband ultrafast circular dichroism spectroscopy in the deep ultraviolet in combination with transient absorption and anisotropy measurements. We find that the high-spin-state decay is accompanied by ultrafast changes of its optical activity, reflecting the coupling to a symmetry-breaking torsional twisting mode, contrary to the commonly assumed picture. The diastereoselective ion pairing suppresses the vibrational population of the identified reaction coordinate, thereby achieving a fourfold increase of the high-spin-state lifetime. More generally, our results motivate the synthetic control of the torsional modes of iron(II) complexes as a complementary route to manipulate their spin-crossover dynamics.
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2
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Tipker RM, Muldoon JA, Pham DH, Varga BR, Hughes RP, Glueck DS, Balaich GJ, Rheingold AL. Configurational Lability at Tetrahedral Phosphorus: syn/anti-Isomerization of a P-Stereogenic Phosphiranium Cation by Intramolecular Epimerization at Phosphorus. Angew Chem Int Ed Engl 2022; 61:e202110753. [PMID: 34755431 DOI: 10.1002/anie.202110753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Indexed: 11/05/2022]
Abstract
Tetrahedral main-group compounds are normally configurationally stable, but P-epimerization of the chiral phosphiranium cations syn- or anti-[Mes*P(Me)CH2 CHPh][OTf] (Mes*=2,4,6-(t-Bu)3 C6 H2 ) occurred under mild conditions at 60 °C in CD2 Cl2 , resulting in isomerization to give a syn-enriched equilibrium mixture. Ion exchange with excess [NBu4 ][Δ-TRISPHAT] (Δ-TRISPHAT=Δ-P(o-C6 Cl4 O2 )3 ) followed by chromatography on silica removed [NBu4 ][OTf] and gave mixtures of syn- and anti-[Mes*P(Me)CH2 CHPh][Δ-TRISPHAT]⋅x[NBu4 ][Δ-TRISPHAT]. NMR spectroscopy showed that isomerization proceeded with epimerization at P and retention at C. DFT calculations are consistent with a mechanism involving P-C cleavage to yield a hyperconjugation-stabilized carbocation, pyramidal inversion promoted by σ-interaction of the P lone pair with the neighboring β-carbocation, and ring closure with inversion of configuration at P.
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Affiliation(s)
- Ryan M Tipker
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Jake A Muldoon
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Daniel H Pham
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Balazs R Varga
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Russell P Hughes
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - David S Glueck
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Gary J Balaich
- Department of Chemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Arnold L Rheingold
- Department of Chemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
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3
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Tipker RM, Muldoon JA, Pham DH, Varga BR, Hughes RP, Glueck DS, Balaich GJ, Rheingold AL. Configurational Lability at Tetrahedral Phosphorus:
syn/anti
‐Isomerization of a P‐Stereogenic Phosphiranium Cation by Intramolecular Epimerization at Phosphorus. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ryan M. Tipker
- 6128 Burke Laboratory Department of Chemistry Dartmouth College Hanover NH 03755 USA
| | - Jake A. Muldoon
- 6128 Burke Laboratory Department of Chemistry Dartmouth College Hanover NH 03755 USA
| | - Daniel H. Pham
- 6128 Burke Laboratory Department of Chemistry Dartmouth College Hanover NH 03755 USA
| | - Balazs R. Varga
- 6128 Burke Laboratory Department of Chemistry Dartmouth College Hanover NH 03755 USA
| | - Russell P. Hughes
- 6128 Burke Laboratory Department of Chemistry Dartmouth College Hanover NH 03755 USA
| | - David S. Glueck
- 6128 Burke Laboratory Department of Chemistry Dartmouth College Hanover NH 03755 USA
| | - Gary J. Balaich
- Department of Chemistry University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Arnold L. Rheingold
- Department of Chemistry University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
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4
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Carpenter JP, McTernan CT, Greenfield JL, Lavendomme R, Ronson TK, Nitschke JR. Controlling the shape and chirality of an eight-crossing molecular knot. Chem 2021. [DOI: 10.1016/j.chempr.2021.03.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Hazin K, Patrick BO, Gates DP. Ammonium and Potassium Salts of a Hexacoordinate Phosphorus(V) Anion Featuring P–O and P–C Bonds. Inorg Chem 2018; 58:188-198. [DOI: 10.1021/acs.inorgchem.8b02174] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Khatera Hazin
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Derek P. Gates
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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6
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Riddlestone IM, Kraft A, Schaefer J, Krossing I. Die Schöne (WCA) und das (kationische) Biest: Neues aus der Chemie von und mit schwach koordinierenden Anionen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710782] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ian M. Riddlestone
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Anne Kraft
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Julia Schaefer
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
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7
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Riddlestone IM, Kraft A, Schaefer J, Krossing I. Taming the Cationic Beast: Novel Developments in the Synthesis and Application of Weakly Coordinating Anions. Angew Chem Int Ed Engl 2018; 57:13982-14024. [PMID: 29266644 DOI: 10.1002/anie.201710782] [Citation(s) in RCA: 234] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Indexed: 12/11/2022]
Abstract
This Review gives a comprehensive overview of the most topical weakly coordinating anions (WCAs) and contains information on WCA design, stability, and applications. As an update to the 2004 review, developments in common classes of WCA are included. Methods for the incorporation of WCAs into a given system are discussed and advice given on how to best choose a method for the introduction of a particular WCA. A series of starting materials for a large number of WCA precursors and references are tabulated as a useful resource when looking for procedures to prepare WCAs. Furthermore, a collection of scales that allow the performance of a WCA, or its underlying Lewis acid, to be judged is collated with some advice on how to use them. The examples chosen to illustrate WCA developments are taken from a broad selection of topics where WCAs play a role. In addition a section focusing on transition metal and catalysis applications as well as supporting electrolytes is also included.
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Affiliation(s)
- Ian M Riddlestone
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Anne Kraft
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Julia Schaefer
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
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8
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Zhan C, Han Z, Patrick BO, Gates DP. 2-Aminophenolate ligands for phosphorus(v): a lithium salt featuring the chiral [P(OC 6H 4NR) 3] - anion. Dalton Trans 2018; 47:12118-12129. [PMID: 30065977 DOI: 10.1039/c8dt02522c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Phosphoranes P(OC6H4NR)2(OC6H4NHR) [R = Me (2a), Ph (2b), C6F5 (2c)] were synthesized by treating PCl5 with the respective 2-aminophenol derivative (1a-c, 3.1 equiv.). In one instance, an intermediate species, P(OC6H4NR)2Cl [R = Me (3a)], was isolated and structurally characterized. Deprotonation of the amine moieties (-NH[combining low line]R) in phosphoranes 2a and 2b with a strong alkali-metal base (e.g. n-BuLi) in the presence of a strong-donor solvent (e.g. THF) afforded salts composed of the hexacoordinate P(v)-anions [P(OC6H4NR)3]- (R = Me, [4a]-; Ph, [4b]-). Employing precursor 2a, the salt Li(THF)3fac-[4a]- was isolated. The X-ray crystal of each enantiomer of [4a]- was determined and, to our knowledge, represents the first structurally characterized example of a salt containing a hexacoordinate P(v)N3O3 anion featuring P(v)-N bonds.
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Affiliation(s)
- Chuantian Zhan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, CanadaV6T 1Z1.
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9
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Rizzuto FJ, Ramsay WJ, Nitschke JR. Otherwise Unstable Structures Self-Assemble in the Cavities of Cuboctahedral Coordination Cages. J Am Chem Soc 2018; 140:11502-11509. [PMID: 30114908 DOI: 10.1021/jacs.8b07494] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We present a method for the directed self-assembly of interlocked structures and coordination complexes in a set of metal-organic hosts. New homo- and heteroleptic metal complexes-species that cannot be prepared outside-form within the cavities of cuboctahedral coordination cages. When linear bidentate guests and macrocycles are sequentially introduced to the host, a rotaxane is threaded internally; the resulting ternary host-guest complex is a new kind of molecular gyroscope. Tetradentate guests segregate the cavities of these cages into distinct spaces, promoting new stoichiometries and modes of ligand binding to metal ions. The behaviors of bound complexes were observed to alter markedly as a result of confinement: In situ oxidations and spin transitions, neither of which occur ex situ, were both observed to proceed. By providing a tailored space for new modes of coordination-driven self-assembly, the inner phases of cuboctahedral coordination cages provide a new medium for synthetic coordination chemistry.
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Affiliation(s)
- Felix J Rizzuto
- Department of Chemistry , University of Cambridge , Cambridge CB2 1EW , United Kingdom
| | - William J Ramsay
- Department of Chemistry , University of Cambridge , Cambridge CB2 1EW , United Kingdom
| | - Jonathan R Nitschke
- Department of Chemistry , University of Cambridge , Cambridge CB2 1EW , United Kingdom
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10
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Naim A, Bouhadja Y, Cortijo M, Duverger-Nédellec E, Flack HD, Freysz E, Guionneau P, Iazzolino A, Ould Hamouda A, Rosa P, Stefańczyk O, Valentín-Pérez Á, Zeggar M. Design and Study of Structural Linear and Nonlinear Optical Properties of Chiral [Fe(phen)3]2+ Complexes. Inorg Chem 2018; 57:14501-14512. [DOI: 10.1021/acs.inorgchem.8b01089] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ahmad Naim
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
| | - Yacine Bouhadja
- Department of Chemistry, University of Annaba, BP 12-23200 Sidi-Ammar, Algérie
| | - Miguel Cortijo
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
- CRPP, CNRS, Université de Bordeaux, UMR 5031, F-33600 Pessac, France
| | | | - Howard D. Flack
- Chimie Minérale, Analytique et Appliquée, Sciences II, Université de Genève, 30, Quai Ernest-Ansermet CH-1211 Geneva Switzerland
| | - Eric Freysz
- LOMA, UMR CNRS 5798, 351 Cours de la Libération, FR-33405 Talence Cedex, France
| | | | - Antonio Iazzolino
- LOMA, UMR CNRS 5798, 351 Cours de la Libération, FR-33405 Talence Cedex, France
| | - Amine Ould Hamouda
- LOMA, UMR CNRS 5798, 351 Cours de la Libération, FR-33405 Talence Cedex, France
| | - Patrick Rosa
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
| | - Olaf Stefańczyk
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
| | - Ángela Valentín-Pérez
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
- CRPP, CNRS, Université de Bordeaux, UMR 5031, F-33600 Pessac, France
| | - Mehdi Zeggar
- ICMCB, CNRS, Université de Bordeaux, UMR 5026, F-33600 Pessac, France
- Department of Chemistry, University of Annaba, BP 12-23200 Sidi-Ammar, Algérie
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11
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Abstract
Treating PCl5 with C12H8Li2, generated from either C12H10, C12H8Br2, or C12H8I2, affords three products in different ratios depending on the source of the lithiated biphenyl. Hellwinkel’s salt [P(C12H8)2][P(C12H8)3] ([1][2]) and another product [P(C12H8)(C24H16)][P(C12H8)3] ([1′][2]) were obtained by reacting PCl5 with 2,2′-dilithiobiphenyl [Route A: 2.5 equiv.; obtained from biphenyl, n-BuLi, and TMEDA; Route B: 3.0 equiv.; obtained from 2,2′-diiodobiphenyl and n-BuLi; Route C: 4.0 equiv.; obtained from 2,2′-dibromobiphenyl and n-BuLi]. The synthesis, isolation, and characterization of the chiral spiro-compound [1′][2] and the characterization of the pentavalent phosphorane [P(C12H8)2(C12H9)] (3) are reported. The complex [1′][2] was characterized by 31P{1H} NMR spectroscopy, X-ray crystallography, and mass spectrometry. The pentavalent compound (3) was characterized by 31P{1H} NMR spectroscopy and X-ray crystallography.
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Affiliation(s)
- Khatera Hazin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Derek P. Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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12
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Huang F, Ma L, Che Y, Jiang H, Chen X, Wang Y. Corannulene-Based Coordination Cage with Helical Bias. J Org Chem 2018; 83:733-739. [DOI: 10.1021/acs.joc.7b02709] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Fu Huang
- Key
Laboratory of Theoretical and Computational Photochemistry and Key
Laboratory of Radiopharmaceuticals, Ministry of Education, College
of Chemistry, Beijing Normal University, Beijing 100875, China
- Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lishuang Ma
- Key
Laboratory of Theoretical and Computational Photochemistry and Key
Laboratory of Radiopharmaceuticals, Ministry of Education, College
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yanke Che
- Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hua Jiang
- Key
Laboratory of Theoretical and Computational Photochemistry and Key
Laboratory of Radiopharmaceuticals, Ministry of Education, College
of Chemistry, Beijing Normal University, Beijing 100875, China
- School of Chemical & Environmental Engineering, Wuyi University, Jiangmen 529020, China
| | - Xuebo Chen
- Key
Laboratory of Theoretical and Computational Photochemistry and Key
Laboratory of Radiopharmaceuticals, Ministry of Education, College
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ying Wang
- Key
Laboratory of Theoretical and Computational Photochemistry and Key
Laboratory of Radiopharmaceuticals, Ministry of Education, College
of Chemistry, Beijing Normal University, Beijing 100875, China
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14
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Hazin K, Serin SC, Patrick BO, Ezhova MB, Gates DP. [HL2][P(1,2-O2C6Cl4)3] (L = THF, DMF): Brønsted acid initiators for the polymerization of n-butyl vinyl ether and p-methoxystyrene. Dalton Trans 2017; 46:5901-5910. [DOI: 10.1039/c6dt04820j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The development of solid, weighable Brønsted acids featuring the hexacoordinated phosphorous(v) anion [TRISPHAT]− are reported.
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Affiliation(s)
- Khatera Hazin
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Spencer C. Serin
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Brian O. Patrick
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Maria B. Ezhova
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Derek P. Gates
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
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15
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Jugé S. Designing P*-chirogenic Organophosphorus Compounds: from Ligands to Organocatalysts. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.999368] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Sylvain Jugé
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB-StéréochIM), UMR CNRS 6302, 9 avenue A. Savary, 21078, Dijon Cedex, France
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16
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Scherer A, Mukherjee T, Hampel F, Gladysz JA. Metal-Templated Hydrogen Bond Donors as “Organocatalysts” for Carbon–Carbon Bond Forming Reactions: Syntheses, Structures, and Reactivities of 2-Guanidinobenzimidazole Cyclopentadienyl Ruthenium Complexes. Organometallics 2014. [DOI: 10.1021/om500704u] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Alexander Scherer
- Institut für
Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054 Erlangen, Germany
| | - Tathagata Mukherjee
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012, United States
| | - Frank Hampel
- Institut für
Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054 Erlangen, Germany
| | - John A. Gladysz
- Institut für
Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054 Erlangen, Germany
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012, United States
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17
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Mukherjee T, Ganzmann C, Bhuvanesh N, Gladysz JA. Syntheses of Enantiopure Bifunctional 2-Guanidinobenzimidazole Cyclopentadienyl Ruthenium Complexes: Highly Enantioselective Organometallic Hydrogen Bond Donor Catalysts for Carbon–Carbon Bond Forming Reactions. Organometallics 2014. [DOI: 10.1021/om500705s] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tathagata Mukherjee
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Carola Ganzmann
- Institut für Organische Chemie and Interdisciplinary Center
for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054 Erlangen, Germany
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
- Institut für Organische Chemie and Interdisciplinary Center
for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054 Erlangen, Germany
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18
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Werlé C, Bailly C, Karmazin-Brelot L, Le Goff XF, Ricard L, Djukic JP. Hemichelation, a Way To Stabilize Electron-Unsaturated Complexes: The Case of T-Shaped Pd and Pt Metallacycles. J Am Chem Soc 2013; 135:17839-52. [DOI: 10.1021/ja4076327] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Christophe Werlé
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
- Département de Chimie, Ecole Polytechnique, CNRS, Route de Saclay, F-91128 Palaiseau cedex, France
| | - Corinne Bailly
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
- Département de Chimie, Ecole Polytechnique, CNRS, Route de Saclay, F-91128 Palaiseau cedex, France
| | - Lydia Karmazin-Brelot
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
- Département de Chimie, Ecole Polytechnique, CNRS, Route de Saclay, F-91128 Palaiseau cedex, France
| | - Xavier-Frédéric Le Goff
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
- Département de Chimie, Ecole Polytechnique, CNRS, Route de Saclay, F-91128 Palaiseau cedex, France
| | - Louis Ricard
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
- Département de Chimie, Ecole Polytechnique, CNRS, Route de Saclay, F-91128 Palaiseau cedex, France
| | - Jean-Pierre Djukic
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS, 4 rue Blaise Pascal, F-67000 Strasbourg, France
- Département de Chimie, Ecole Polytechnique, CNRS, Route de Saclay, F-91128 Palaiseau cedex, France
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19
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Ito H, Tsukube H, Shinoda S. Chirality transfer in propeller-shaped cyclen-calcium(II) complexes: metal-coordinating and ion-pairing anion procedures. Chemistry 2013; 19:3330-9. [PMID: 23404763 DOI: 10.1002/chem.201204323] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Indexed: 11/07/2022]
Abstract
A series of quadruple-stranded Na(+) and Ca(2+) complexes with octadentate cyclen ligands was synthesized to produce complexes that contained four different side-arm combinations (one triazole-coumarin group and three pyridine groups (1), four pyridine groups (2), one triazole-coumarin group and three quinoline groups (3), and four quinoline groups (4)). X-ray crystallographic analysis revealed that no significant changes occurred in the stereostructure of these complexes upon replacing one pyridine group with a triazole-coumarin moiety, or by replacing Na(+) ions with Ca(2+) ions, although the coordination number of the complexes in the solid state decreased when pyridine groups were replaced by quinoline groups. In solution, all of the side arms were arranged in a propeller-like pattern to yield an enantiomer pair of Δ and Λ forms in each metal complex. The addition of a tert-butoxycarbonyl (Boc)-protected amino acid anion, that is, a coordinative chiral carboxylate anion, to the cyclen-Ca(2+) complex induced circular dichroism (CD) signals in the aromatic region by forming a 1:1 mixture of diastereomeric ternary complexes with opposite complex chirality, whilst the corresponding Na(+) complexes rarely showed any response. In complexes 1-Ca(2+) and 3-Ca(2+), this chirality-transfer process was efficiently followed by considering the induction of the CD signals at two different wavelengths, that is, the coumarin-chromophore region and the aza-aromatic region. The sign and intensity of the CD signal were significantly dependent on both the nature of the aza-aromatic moiety and the enantiomeric purity of the external anion. These Ca(2+) complexes worked as effective probes for the determination of the enantiomeric excess of the chiral anion. The cyclen-Ca(2+) complexes also interacted with the non-coordinative Δ-TRISPHAT anion through an ion-pairing mechanism to achieve chirality transfer from the anion to the metal complex; both complexes 1-Ca(2+) and 3-Ca(2+) clearly showed induced CD signals in the coumarin-chromophore region, owing to ion-paring interactions with the Δ-TRISPHAT anion. Thus, the proper combination of an octadentate cyclen ligand and a metal center demonstrated effective chirality transfer.
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Affiliation(s)
- Hiroshi Ito
- JST, CREST, and Department of Chemistry, Graduated School of Science Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
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Reddy G. N. M, Ballesteros-Garrido R, Lacour J, Caldarelli S. Determination of Labile Chiral Supramolecular Ion Pairs by Chromatographic NMR Spectroscopy. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209616] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Reddy G. N. M, Ballesteros-Garrido R, Lacour J, Caldarelli S. Determination of Labile Chiral Supramolecular Ion Pairs by Chromatographic NMR Spectroscopy. Angew Chem Int Ed Engl 2013; 52:3255-8. [DOI: 10.1002/anie.201209616] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Indexed: 11/07/2022]
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Damas A, Ventura B, Moussa J, Esposti AD, Chamoreau LM, Barbieri A, Amouri H. Turning on Red and Near-Infrared Phosphorescence in Octahedral Complexes with Metalated Quinones. Inorg Chem 2012; 51:1739-50. [DOI: 10.1021/ic202021w] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Aurélie Damas
- Institut Parisien de Chimie
Moléculaire, UMR 7201, Université Pierre et Marie Curie, Paris 6, 4 place Jussieu, case 42, 75252
Paris Cedex 05, France
| | - Barbara Ventura
- Istituto per la Sintesi Organica
e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna,
Italy
| | - Jamal Moussa
- Institut Parisien de Chimie
Moléculaire, UMR 7201, Université Pierre et Marie Curie, Paris 6, 4 place Jussieu, case 42, 75252
Paris Cedex 05, France
| | - Alessandra Degli Esposti
- Istituto per la Sintesi Organica
e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna,
Italy
| | - Lise-Marie Chamoreau
- Institut Parisien de Chimie
Moléculaire, UMR 7201, Université Pierre et Marie Curie, Paris 6, 4 place Jussieu, case 42, 75252
Paris Cedex 05, France
| | - Andrea Barbieri
- Institut Parisien de Chimie
Moléculaire, UMR 7201, Université Pierre et Marie Curie, Paris 6, 4 place Jussieu, case 42, 75252
Paris Cedex 05, France
- Istituto per la Sintesi Organica
e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna,
Italy
| | - Hani Amouri
- Institut Parisien de Chimie
Moléculaire, UMR 7201, Université Pierre et Marie Curie, Paris 6, 4 place Jussieu, case 42, 75252
Paris Cedex 05, France
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Gaillard S, Rix D, Slawin AMZ, Lacour J, Nolan SP. Phosphate binding to the [Au(IPr)] moiety: inner vs. outer sphere coordination behaviour. Dalton Trans 2012; 41:8235-7. [DOI: 10.1039/c2dt30440f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang Y, Gustafson LO, Chen EYX. Dinuclear silylium-enolate bifunctional active species: remarkable activity and stereoselectivity toward polymerization of methacrylate and renewable methylene butyrolactone monomers. J Am Chem Soc 2011; 133:13674-84. [PMID: 21819049 DOI: 10.1021/ja2053573] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel dinuclear silylium-enolate active species, consisting of an electrophilic silylium catalyst site and a nucleophilic silicon enolate initiating site that are covalently linked as single molecules, and their unique polymerization characteristics and kinetics are reported. Such unimolecular, bifunctional propagating species are conveniently generated from activation of ethyl- and oxo-bridged disilicon enolate (i.e., disilyl ketene acetal, di-SKA) compounds with [Ph(3)C][B(C(6)F(5))(4)]. Both the ethyl- and oxo-bridged dinuclear species are much more active for the polymerization of methyl methacrylate (MMA) than the mononuclear SKA-based active species, exhibiting an approximate rate enhancement by a factor of 12 and 44, respectively. The oxo-bridged silylium-enolate species is considerably more active and controlled than the ethyl-bridged one, with their differences being even more pronounced in polymerizing a renewable monomer, γ-methyl-α-methylene-γ-butyrolactone. The polymerization by the oxo-bridged silylium-enolate active species follows first-order kinetics in both monomer and silylium catalyst concentrations, indicating a unimolecular propagation mechanism which involves an intramolecular delivery of the polymeric enolate nucleophile to the monomer activated by the silylium ion electrophile being placed in proximity in the same catalyst molecule. Highly stereoregular poly(methyl methacrylate) (PMMA), with a syndiotacticity up to 92% rr, can be produced in quantitative yield using the oxo-bridged propagator at low temperature.
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Affiliation(s)
- Yuetao Zhang
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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25
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Chmel NP, Allan LEN, Becker JM, Clarkson GJ, Turner SS, Scott P. TTF salts of optically pure cobalt pyridine amidates; detection of soluble assemblies with stoichiometry corresponding to the solid state. Dalton Trans 2011; 40:1722-31. [DOI: 10.1039/c0dt01184c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Westerlund F, Elm J, Lykkebo J, Carlsson N, Thyrhaug E, Åkerman B, Sørensen TJ, Mikkelsen KV, Laursen BW. Direct probing of ion pair formation using a symmetric triangulenium dye. Photochem Photobiol Sci 2011; 10:1963-73. [DOI: 10.1039/c1pp05253e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Hu Y, Xu X, Zhang Y, Chen Y, Chen EYX. Polymerization of Naturally Renewable Methylene Butyrolactones by Half-Sandwich Indenyl Rare Earth Metal Dialkyls with Exceptional Activity. Macromolecules 2010. [DOI: 10.1021/ma101901y] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yangjian Hu
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Xin Xu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, PRC
| | - Yuetao Zhang
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Yaofeng Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, PRC
| | - Eugene Y.-X. Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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28
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Lacour J. Chiral hexacoordinated phosphates: From pioneering studies to modern uses in stereochemistry. CR CHIM 2010. [DOI: 10.1016/j.crci.2010.02.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Rh(I) coordination chemistry of hexacationic Dendriphos ligands and their application in hydroformylation catalysis. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.04.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Novikov R, Lacour J. Enantioselective iminium-catalyzed epoxidation of hindered trisubstituted allylic alcohols. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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31
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Miyake GM, Zhang Y, Chen EYX. Living Polymerization of Naturally Renewable Butyrolactone-Based Vinylidene Monomers by Ambiphilic Silicon Propagators. Macromolecules 2010. [DOI: 10.1021/ma100615t] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Garret M. Miyake
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Yuetao Zhang
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Eugene Y.-X. Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
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32
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Permanent Encapsulation or Host-Guest Behavior of Aromatic Molecules in Hexanuclear Arene Ruthenium Prisms. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000191] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Vachon J, Bernardinelli G, Lacour J. Resolution of the First Nonracemic Diquats. Chemistry 2010; 16:2797-805. [DOI: 10.1002/chem.200902562] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Chmel NP, Howson SE, Allan LEN, Barker J, Clarkson GJ, Turner SS, Scott P. Organic-soluble optically pure anionic metal complexes PPh4[MIII(S,S-EDDS)]·2H2O (M = Fe, Co, Cr). Dalton Trans 2010; 39:2919-27. [DOI: 10.1039/b924787d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Michon C, Gonçalves-Farbos MH, Lacour J. NMR enantiodifferentiation of quaternary ammonium salts of Tröger base. Chirality 2009; 21:809-17. [DOI: 10.1002/chir.20687] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Constable E, Housecroft C, Neuburger M, Rösel P, Schaffner S, Zampese J. Metallomacrocycles with a Difference: Macrocyclic Complexes with Exocyclic Ruthenium(II)-Containing Domains. Chemistry 2009; 15:11746-57. [DOI: 10.1002/chem.200901640] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Hintermann L, Xiao L, Labonne A, Englert U. [CpRu(η6-naphthalene)]PF6 as Precursor in Complex Synthesis and Catalysis with the Cyclopentadienyl-Ruthenium(II) Cation. Organometallics 2009. [DOI: 10.1021/om900333t] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lukas Hintermann
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Li Xiao
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Aurélie Labonne
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Ulli Englert
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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38
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Moussa J, Gandon V, Rager MN, Malacria M, Chamoreau LM, Amouri H. An Unusual Anion-π Interaction in an ;rido Organometallic Assembly: Synthesis, First Crystal Structure, and Computational Study. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900497] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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39
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Barry NPE, Austeri M, Lacour J, Therrien B. Highly Efficient NMR Enantiodiscrimination of Chiral Octanuclear Metalla-Boxes in Polar Solvent. Organometallics 2009. [DOI: 10.1021/om900461s] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicolas P. E. Barry
- Institut de Chimie, Université de Neuchâtel, Case postale 158, CH-2009 Neuchâtel, Switzerland
| | - Martina Austeri
- Department of Organic Chemistry, University of Geneva, Quai E. Ansermet 30, CH-1211, Geneva 4, Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva, Quai E. Ansermet 30, CH-1211, Geneva 4, Switzerland
| | - Bruno Therrien
- Institut de Chimie, Université de Neuchâtel, Case postale 158, CH-2009 Neuchâtel, Switzerland
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40
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Bonnet S, Li J, Siegler M, von Chrzanowski L, Spek A, van Koten G, Klein Gebbink RJ. Synthesis and Resolution of Planar-Chiral Ruthenium-Palladium Complexes with ECE′ Pincer Ligands. Chemistry 2009; 15:3340-3. [DOI: 10.1002/chem.200900117] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Constable EC, Zhang G, Housecroft CE, Neuburger M, Schaffner S. Diastereoselective complex formation with a simple C2-symmetric hexadentate ligand based on a 1,1′-binaphthalene scaffold. Dalton Trans 2009:8165-7. [DOI: 10.1039/b916996m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Chow HS, Constable EC, Frantz R, Housecroft CE, Lacour J, Neuburger M, Rappoport D, Schaffner S. Conformationally-locked metallomacrocycles—prototypes for a novel type of axial chirality. NEW J CHEM 2009. [DOI: 10.1039/b819588a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Lacour J, Moraleda D. Chiral anion-mediated asymmetric ion pairing chemistry. Chem Commun (Camb) 2009:7073-89. [DOI: 10.1039/b912530b] [Citation(s) in RCA: 257] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Bouit PA, Aronica C, Guy L, Martinez A, Andraud C, Maury O. Diastereoselective supramolecular ion-pairing between the TRISPHAT anion and pro-chiral heptamethine cyanine dyes. Org Biomol Chem 2009. [DOI: 10.1039/b905366b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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45
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Zhang Y, Chen EYX. Structure−Reactivity Relationships in Bimolecular-Activated Monomer Polymerization of (Meth)acrylates Using Oxidatively Activated Group 14 Ketene Acetals. Macromolecules 2008. [DOI: 10.1021/ma801125y] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuetao Zhang
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Eugene Y.-X. Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
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46
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Novikov R, Bernardinelli G, Lacour J. Enantioselective Olefin Epoxidation using Axially Chiral Biaryl Azepinium Salts as Catalysts. Rapidin-situ Screening and Origin of the Stereocontrol. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Zalubovskis R, Bouet A, Fjellander E, Constant S, Linder D, Fischer A, Lacour J, Privalov T, Moberg C. Self-adaptable catalysts: substrate-dependent ligand configuration. J Am Chem Soc 2008; 130:1845-55. [PMID: 18198867 DOI: 10.1021/ja074044k] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pd(II) allyl and Pd(0) olefin complexes containing the configurationally labile ligand 1,2-bis-[4,5-dihydro-3H-dibenzo[c-e]azepino]ethane were studied as models for intermediates in Pd-catalyzed allylic alkylations. According to NMR and DFT studies, the ligand prefers C(s) conformation in both eta3-1,3-diphenylpropenyl and eta3-cyclohexenyl Pd(II) complexes, whereas in Pd(0) olefin complexes it adopts different conformations in complexes derived from the two types of allyl systems in both solution and, as verified by X-ray crystallography, in the solid state. These results demonstrate that the Pd complex is capable of adapting its structure to the reacting substrate. The different structural preferences also provide an explanation for the behavior of 1,3-diphenyl-2-propenyl acetate and 2-cyclohexenyl acetate in Pd-catalyzed allylic alkylations using pseudo-C2 and pseudo-C(s) symmetric ligands.
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Affiliation(s)
- Raivis Zalubovskis
- KTH School of Chemical Science and Engineering, Department of Chemistry, Organic Chemistry, SE 100 44 Stockholm, Sweden
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48
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Pérollier C, Bernardinelli G, Lacour J. Sugar derived hexacoordinated phosphates: Chiral anionic auxiliaries with general asymmetric efficiency. Chirality 2008; 20:313-24. [PMID: 17614326 DOI: 10.1002/chir.20441] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Mannose-derived hexacoordinated phosphate anions, prepared in as few as two steps from methyl-alpha-D-mannopyranoside and tris(dimethylamino)phosphine, are chiral anionic auxiliaries with broad asymmetric efficiency. These chemically robust anions are effective NMR chiral solvating agents and efficient asymmetry-inducers, able to control the configuration of conformationally labile C2-symmetric monomethinium cations (organic, helical, charge 1+, P or M enantiomers) and D3-symmetric iron(II) trisdiimine complexes (metallo-organic, octahedral, charge 2+, Delta or Lambda enantiomers). Diastereomeric control with often unmatched selective levels was achieved with the help of mannopyranoside backbone of the anions and the substituents on the [1,3]dioxane ring that play a key role in the recognition process, something not obvious at first sight.
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Affiliation(s)
- Céline Pérollier
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
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49
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Djukic JP, Hijazi A, Flack HD, Bernardinelli G. Non-racemic (scalemic) planar-chiral five-membered metallacycles: routes, means, and pitfalls in their synthesis and characterization. Chem Soc Rev 2008; 37:406-25. [DOI: 10.1039/b618557f] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Frantz R, Guillamón E, Lacour J, Llusar R, Polo V, Vicent C. C3-Symmetric Trinuclear Molybdenum Cluster Sulfides: Configurational Stability, Supramolecular Stereocontrol, and Absolute Configuration Assignment. Inorg Chem 2007; 46:10717-23. [DOI: 10.1021/ic701522p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard Frantz
- Département de Chimie Organique, Université de Genève, quai Ernest-Ansermet 30, CH-1211 Genève 4, Switzerland, and Departament de Química Física i Analítica, and Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, E-12080, Castelló, Spain
| | - Eva Guillamón
- Département de Chimie Organique, Université de Genève, quai Ernest-Ansermet 30, CH-1211 Genève 4, Switzerland, and Departament de Química Física i Analítica, and Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, E-12080, Castelló, Spain
| | - Jérôme Lacour
- Département de Chimie Organique, Université de Genève, quai Ernest-Ansermet 30, CH-1211 Genève 4, Switzerland, and Departament de Química Física i Analítica, and Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, E-12080, Castelló, Spain
| | - Rosa Llusar
- Département de Chimie Organique, Université de Genève, quai Ernest-Ansermet 30, CH-1211 Genève 4, Switzerland, and Departament de Química Física i Analítica, and Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, E-12080, Castelló, Spain
| | - Victor Polo
- Département de Chimie Organique, Université de Genève, quai Ernest-Ansermet 30, CH-1211 Genève 4, Switzerland, and Departament de Química Física i Analítica, and Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, E-12080, Castelló, Spain
| | - Cristian Vicent
- Département de Chimie Organique, Université de Genève, quai Ernest-Ansermet 30, CH-1211 Genève 4, Switzerland, and Departament de Química Física i Analítica, and Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, E-12080, Castelló, Spain
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