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O’Reilly RJ, Karton A. The influence of substituents in governing the strength of the P-X bonds of substituted halophosphines R 1R 2P-X (X = F and Cl). Front Chem 2023; 11:1283418. [PMID: 37854977 PMCID: PMC10579588 DOI: 10.3389/fchem.2023.1283418] [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: 08/26/2023] [Accepted: 09/15/2023] [Indexed: 10/20/2023] Open
Abstract
In this study, the gas-phase homolytic P-F and P-Cl bond dissociation energies (BDEs) of a set of thirty fluorophosphine (R1R2P-F) and thirty chlorophosphine-type (R1R2P-Cl) molecules have been obtained using the high-level W2 thermochemical protocol. For the R1R2P-F species, the P-F BDEs (at 298 K) differ by up to 117.0 kJ mol-1, with (H3Si)2P-F having the lowest BDE (439.5 kJ mol-1) and F2P-F having the largest BDE (556.5 kJ mol-1). In the case of the chlorophosphine-type molecules, the difference in BDEs is considerably smaller (i.e., 72.6 kJ mol-1), with (NC)2P-Cl having the lowest P-Cl BDE (299.8 kJ mol-1) and (HO)2P-Cl having the largest (372.4 kJ mol-1). We have further analyzed the effect of substituents in governing the P-F and P-Cl BDEs by considering the effect of substituents in the parent halogenated precursors (using molecule stabilization enthalpies) and the effect of substituents in the product radicals (using radical stabilization enthalpies). Finally, we have also assessed the performance of a wide range of DFT methods for their ability to compute the gas-phase P-F and P-Cl BDEs contained in this dataset. We find that, overall, the double hybrid functional DSD-PBEB95 offers the best performance for both bond types, with mean absolute deviations of just 2.1 (P-F BDEs) and 2.2 (P-Cl BDEs) kJ mol-1.
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Affiliation(s)
- Robert J. O’Reilly
- School of Science and Technology, University of New England, Armidale, NSW, Australia
| | - Amir Karton
- School of Science and Technology, University of New England, Armidale, NSW, Australia
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Zanchin G, Gavezzoli A, Bertini F, Ricci G, Leone G. Homo- and Copolymerization of Ethylene with Norbornene Catalyzed by Vanadium(III) Phosphine Complexes. Molecules 2019; 24:molecules24112088. [PMID: 31159332 PMCID: PMC6600629 DOI: 10.3390/molecules24112088] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 11/16/2022] Open
Abstract
Herein, we report the homo- and co-polymerization of ethylene (E) with norbornene (NB) catalyzed by vanadium(III) phosphine complexes of the type VCl3(PMenPh3-n)2 [n = 2 (1a), 1 (1b)] and VCl3(PR3)2 [R = phenyl (Ph, 1c), cyclohexyl (Cy, 1d), tert-butyl (tBu, 1e)]. In the presence of Et2AlCl and Cl3CCOOEt (ETA), 1a-1e exhibit good activities for the polymerization of ethylene, affording linear, semicrystalline PEs with a melting temperature of approximately 130 °C. Mainly alternating copolymers with high comonomer incorporation were obtained in the E/NB copolymerization. A relationship was found between the electronic and steric properties of the phosphine ligands and the catalytic performance. Overall, the presence of electron-withdrawing ligand substituents increases the productivity, complexes with aryl phosphine (weaker σ-donor character) exhibiting a higher (co)polymerization initiation rate than those with alkyl phosphines (stronger σ-donor character). Steric effects also seem to play a key role since 1d and 1e, having large size phosphines (PCy3 θ = 170° and PtBu3 θ = 182°, respectively) are more active than 1a (PMe2Ph θ = 122°). In this case, the larger size of PtBu3 and PCy3 likely compensates for their higher donor strength compared to PMe2Ph.
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Affiliation(s)
- Giorgia Zanchin
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Alessia Gavezzoli
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Fabio Bertini
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Giovanni Ricci
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Giuseppe Leone
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
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Xamonaki N, Asimakopoulos A, Balafas A, Dasenaki M, Choinopoulos I, Coco S, Simandiras E, Koinis S. Tetrathiomolybdate Complexes of Rhodium(I) with Molybdenum–Rhodium Interactions. Inorg Chem 2016; 55:4771-81. [DOI: 10.1021/acs.inorgchem.6b00072] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nikoletta Xamonaki
- Faculty of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | | | - Anastasios Balafas
- Faculty of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Marilena Dasenaki
- Faculty of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Ioannis Choinopoulos
- Faculty of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Silverio Coco
- IU/CINQUIMA, Quı́mica Inorgánica,
Facultad de Ciencias, Universitad de Valladolid, 47071 Valladolid, Spain
| | - Emmanuel Simandiras
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Spyros Koinis
- Faculty of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
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Wolters LP, Koekkoek R, Bickelhaupt FM. Role of Steric Attraction and Bite-Angle Flexibility in Metal-Mediated C–H Bond Activation. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01354] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lando P. Wolters
- Department
of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling, VU University, De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
| | - Rick Koekkoek
- Department
of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling, VU University, De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
| | - F. Matthias Bickelhaupt
- Department
of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling, VU University, De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
- Institute
for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg
135, NL-6525 AJ
Nijmegen, The Netherlands
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Kendall AJ, Salazar CA, Martino PF, Tyler DR. Direct Conversion of Phosphonates to Phosphine Oxides: An Improved Synthetic Route to Phosphines Including the First Synthesis of Methyl JohnPhos. Organometallics 2014. [DOI: 10.1021/om500854u] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Alexander J. Kendall
- Department of Chemistry & Biochemistry, University of Oregon, 1253 University of Oregon, Eugene, Oregon 97403, United States
| | - Chase A. Salazar
- Department of Chemistry & Biochemistry, University of Oregon, 1253 University of Oregon, Eugene, Oregon 97403, United States
| | - Patrick F. Martino
- Department of Chemistry & Biochemistry, University of Oregon, 1253 University of Oregon, Eugene, Oregon 97403, United States
| | - David R. Tyler
- Department of Chemistry & Biochemistry, University of Oregon, 1253 University of Oregon, Eugene, Oregon 97403, United States
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Torres Ò, Roglans A, Pla-Quintana A, Luis JM, Solà M. Computational insight into Wilkinson's complex catalyzed [2 + 2 + 2] cycloaddition mechanism leading to pyridine formation. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.06.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Kihara K, Yamaguchi S, Kawahata Y, Kita M, Suzuki T, Sunatsuki Y, Kojima M, Kashiwabara K. Preparation, crystal structures, and spectroscopic properties of cobalt(III) complexes bearing 2,4-pentanedionate (acac−) and 2-cyanoethylphosphines: trans-[Co(acac)2{P(CH2CH2CN)nPh3–n}]BF4 (n=1–3). Polyhedron 2014. [DOI: 10.1016/j.poly.2013.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Mirzadeh N, Privér SH, Bennett MA, Wagler J, Bhargava SK. Divalent Platinum Complexes of the Carbanion 2-C6F4AsPh2: Monodentate or Bidentate Coordination? Organometallics 2013. [DOI: 10.1021/om400961z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nedaossadat Mirzadeh
- Centre for Advanced Materials & Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, Victoria 3001, Australia
| | - Steven H. Privér
- Centre for Advanced Materials & Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, Victoria 3001, Australia
| | - Martin A. Bennett
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 0200, Australia
| | - Jörg Wagler
- Institut für Anorganische Chemie, Technische Universität Bergakademie, Freiberg D-09596, Germany
| | - Suresh K. Bhargava
- Centre for Advanced Materials & Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, Victoria 3001, Australia
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Basu P, Kail BW, Adams AK, Nemykin VN. Quantitation of the ligand effect in oxo-transfer reactions of dioxo-Mo(VI) trispyrazolyl borate complexes. Dalton Trans 2012; 42:3071-81. [PMID: 23212540 DOI: 10.1039/c2dt32349d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxygen atom transfer reactivity (OAT) of dioxo-Mo(VI) complexes of hydrotrispyrazolyl borate (hydrotris(3,5-dimethylpyrazolyl)borate, Tp(Me2); hydrotris(3-isopropylpyrazol-1-yl)borate, Tp(iPr)) with tertiary phosphines (PMe(3), PMe(2)Ph, PEt(3), PEt(2)Ph, PBu(n)(3), PMePh(2), or PEtPh(2)) has been investigated. In acetonitrile, these reactions proceed via the formation of a phosphoryl intermediate complex that undergoes a solvolysis reaction. We report the synthesis and characterization of several phosphoryl complexes. The rates of formation of phosphoryl complexes and their solvation were determined by spectrophotometry. The rates of the reactions and the properties of the phosphoryl species were investigated using the Quantitative Analysis of Ligand Effect (QALE) methodology. The results show that, at least in this system, the first step of the reaction is controlled primarily by the steric factor, and in the second step, both electronic and steric factors are important. We also analyzed the effect of ligands on the reaction rate i.e., Tp(Me2)vs. Tp(iPr).
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Affiliation(s)
- Partha Basu
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15228, USA.
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11
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Phosphine supported metal-dihydrogen complexes: Elongation of H−H bond to reversible release of H2. CR CHIM 2011. [DOI: 10.1016/j.crci.2011.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Ariafard A, Ejehi Z, Sadrara H, Mehrabi T, Etaati S, Moradzadeh A, Moshtaghi M, Nosrati H, Brookes NJ, Yates BF. Insight into the Mechanism of R−R Reductive Elimination from the Six-Coordinate d6 Complexes L2Pt(R)4 (R = vinyl, Me). Organometallics 2011. [DOI: 10.1021/om1005512] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alireza Ariafard
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Zeinab Ejehi
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Hoda Sadrara
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Tahmineh Mehrabi
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Shohreh Etaati
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Azadeh Moradzadeh
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Mahshid Moshtaghi
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Hadis Nosrati
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Nigel J. Brookes
- School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Brian F. Yates
- School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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13
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Dachs A, Osuna S, Roglans A, Solà M. Density Functional Study of the [2+2+2] Cyclotrimerization of Acetylene Catalyzed by Wilkinson’s Catalyst, RhCl(PPh3)3. Organometallics 2010. [DOI: 10.1021/om900836b] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna Dachs
- Departament de Química, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
- Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
| | - Sílvia Osuna
- Departament de Química, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
- Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
| | - Anna Roglans
- Departament de Química, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
| | - Miquel Solà
- Departament de Química, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
- Institut de Química Computacional, Universitat de Girona, Campus de Montilivi, s/n 17071 Girona, Catalonia, Spain
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14
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Starosta R, Bażanów B, Barszczewski W. Chalcogenides of the aminomethylphosphines derived from 1-methylpiperazine, 1-ethylpiperazine and morpholine: NMR, DFT and structural studies for determination of electronic and steric properties of the phosphines. Dalton Trans 2010; 39:7547-55. [DOI: 10.1039/c0dt00037j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Shintani R. γ-Methylidene-δ-valerolactones: New Reagents for Palladium-catalyzed Intermolecular Cyclization Reactions. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ryo Shintani
- Department of Chemistry, Graduate School of Science, Kyoto University
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16
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Roche C, Labeeuw O, Haddad M, Ayad T, Genet JP, Ratovelomanana-Vidal V, Phansavath P. Synthesis ofanti-1,3-Diols through RuCl3/PPh3-Mediated Hydrogenation of β-Hydroxy Ketones: An Alternative to Organoboron Reagents. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900316] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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Maldonado A, Hageman J, Mastroianni S, Rothenberg G. Backbone Diversity Analysis in Catalyst Design. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200800574] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Affiliation(s)
- Dmitry G. Gusev
- Department of Chemistry, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5, Canada
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19
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Poë AJ. The tuning of P-donor ligands: the aryl and other pendent group effects (PGEs) revisited. Dalton Trans 2009:1999-2003. [DOI: 10.1039/b816868g] [Citation(s) in RCA: 14] [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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20
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Michel C, Milet A. Free energy calculation of the effects of the fluorinated phosphorus ligands on the C–H and C–C reductive elimination from Pt(IV). ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2007.12.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Juríček M, Brath H, Kasák P, Putala M. Study on the electronic effects on stereoconservativity of Suzuki coupling in chiral groove of binaphthyl. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.08.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Labeeuw O, Roche C, Phansavath P, Genêt JP. RuCl3/PPh3: An Efficient Combination for the Preparation of Chiral 1,3-anti-Diols through Catalytic Hydrogenation. Org Lett 2006; 9:105-8. [PMID: 17192096 DOI: 10.1021/ol062631p] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] An efficient economical alternative to the commonly used Evans' reagent for the diastereoselective reduction of beta-hydroxy ketones is reported. Thus, ruthenium-mediated hydrogenation of enantioenriched beta-hydroxy ketones using RuCl3 associated to achiral monophosphines allowed the preparation of a series of 1,3-anti-diols in good yields and with a high level of diastereoselectivity. A short screening of ligands pointed out PPh3 as the most effective phosphine, and PCy3 afforded the 1,3-diols with an unexpected moderate syn selectivity.
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Affiliation(s)
- Olivier Labeeuw
- Laboratoire de Synthèse Sélective Organique et Produits Naturels UMR 7573 CNRS, ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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García-Iglesias M, Buñuel E, Cárdenas DJ. Cationic (η1-Allyl)-palladium Complexes as Feasible Intermediates in Catalyzed Reactions. Organometallics 2006. [DOI: 10.1021/om060199+] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Kühl O, Lifson K, Langel W. Calculation of the Ligating Strength of N-Heterocyclic Germylenes – Extending the π-Acceptor Range. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500889] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Möhring PC, Coville NJ. Group 4 metallocene polymerisation catalysts: quantification of ring substituent steric effects. Coord Chem Rev 2006. [DOI: 10.1016/j.ccr.2005.01.024] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Bunten KA, Po? AJ. Multi-mechanism linear free energy relationships and isoequilibrium or isokinetic temperatures. NEW J CHEM 2006. [DOI: 10.1039/b603023h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Feliz M, Freixa Z, van Leeuwen PWNM, Bo C. Revisiting the Methyl Iodide Oxidative Addition to Rhodium Complexes: A DFT Study of the Activation Parameters. Organometallics 2005. [DOI: 10.1021/om050554g] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marta Feliz
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, 43007 Tarragona, Spain, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Avgda. Marcel.lí Domingo s/n, 43007 Tarragona, Spain, and Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands
| | - Zoraida Freixa
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, 43007 Tarragona, Spain, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Avgda. Marcel.lí Domingo s/n, 43007 Tarragona, Spain, and Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands
| | - Piet W. N. M. van Leeuwen
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, 43007 Tarragona, Spain, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Avgda. Marcel.lí Domingo s/n, 43007 Tarragona, Spain, and Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, 43007 Tarragona, Spain, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Avgda. Marcel.lí Domingo s/n, 43007 Tarragona, Spain, and Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands
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28
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Zuidema E, van Leeuwen PWNM, Bo C. Reductive Elimination of Organic Molecules from Palladium−Diphosphine Complexes. Organometallics 2005. [DOI: 10.1021/om050113x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Erik Zuidema
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain, and Catalan Intitute of Chemical Research, ICIQ, Avda. Països Catalans, s/n, 43007 Tarragona, Spain
| | - Piet W. N. M. van Leeuwen
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain, and Catalan Intitute of Chemical Research, ICIQ, Avda. Països Catalans, s/n, 43007 Tarragona, Spain
| | - Carles Bo
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands, Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain, and Catalan Intitute of Chemical Research, ICIQ, Avda. Països Catalans, s/n, 43007 Tarragona, Spain
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29
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Burello E, Marion P, Galland JC, Chamard A, Rothenberg G. Ligand Descriptor Analysis in Nickel-Catalysed Hydrocyanation: A Combined Experimental and Theoretical Study. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200404363] [Citation(s) in RCA: 31] [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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Romeo R, Carnabuci S, Plutino MR, Romeo A, Rizzato S, Albinati A. Structural Properties and Dissociative Fluxional Motion of 2,9-Dimethyl-1,10-Phenanthroline in Platinum(II) Complexes. Inorg Chem 2005; 44:1248-62. [PMID: 15732965 DOI: 10.1021/ic0485920] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A dynamic 1H NMR study has been carried out on the fluxional motion of the symmetric chelating ligand 2,9-dimethyl-1,10-phenanthroline (Me2-phen) between nonequivalent exchanging sites in a variety of square-planar complexes of the type [Pt(Me)(Me2-phen)(PR3)]BArf, 1-14, (BArf = B[3,5-(CF3)2C6H3]4). In these compounds, the P-donor ligands PR3 encompass a wide range of steric and electronic characteristics [PR3 = P(4-XC6H4)3, X = H 1, F, 2, Cl 3, CF3 4, MeO 5, Me 6; PR3 = PMe(C6H5)2 7, PMe2(C6H5) 8, PMe3 9, PEt3 10, P(i-Pr)3 11, PCy(C6H5)2 12, PCy2(C6H5) 13, PCy3 14]. All complexes have been synthesized and fully characterized through elemental analysis, 1H and 31P{1H} NMR. X-ray crystal structures are reported for the compounds 8, 11, 14, and for [Pt(Me)(phen)(P(C6H5)3)]PF6 (15), all but the last showing loss of planarity and a significant rotation of the Me2-phen moiety around the N1-N2 vector. Steric congestion brought about by the P-donor ligands is responsible for tetrahedral distortion of the coordination plane and significant lengthening of the Pt-N2 (cis to phosphane) bond distances. Application of standard quantitative analysis of ligand effects (QALE) methodology enabled a quantitative separation of steric and electronic contributions of P-donor ligands to the values of the platinum-phosphorus 1J(PtP) coupling constants and of the free activation energies DeltaG++ of the fluxional motion of Me2-phen in 1-14. The steric profiles for both 1J(PtP) and DeltaG++ show the onset of steric thresholds (at cone angle values of 150 degrees and 148 degrees , respectively), that are associated with an overload of steric congestion already evidenced by the crystal structures of 11 and 14. The sharp increase of the fluxional rate of Me2-phen can be assumed as a perceptive kinetic tool for revealing ground-state destabilization produced by the P-donor ligands. The mechanism involves initial breaking of a metal-nitrogen bond, fast interconversion between two 14-electron three-coordinate T-shaped intermediates containing eta1-coordinated Me2-phen, and final ring closure. By use of the results from QALE regression analysis, a free-energy surface has been constructed that represents the way in which any single P-donor ligand can affect the energy of the transition state in the absence of aryl or pi-acidity effects.
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Affiliation(s)
- Raffaello Romeo
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Salita Sperone 31, Vill. S. Agata 98166, Messina, Italy.
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31
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Kempf B, Mayr H. Rates and Equilibria of the Reactions of Tertiary Phosphanes and Phosphites with Benzhydrylium Ions. Chemistry 2005; 11:917-27. [PMID: 15593116 DOI: 10.1002/chem.200400696] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The kinetics of the reactions of benzhydrylium ions and quinone methides with eight tertiary phosphanes and two phosphites were investigated photometrically. The nucleophilicity parameters N and slope parameters s of these nucleophiles were derived according to the equation log k(20 degrees C) = s(N + E). Correlations of the nucleophilicity parameters N with pK(Ha) and sigma(p) values as well as with the rate constants of reactions with other electrophiles are discussed. In some cases, equilibrium constants for the formation of phosphonium ions were measured, which allow one to determine the Marcus intrinsic barriers of DeltaG(0) (not equal) = 58 kJ mol(-1) for the reactions of triarylphosphanes with benzhydrylium ions. The N parameters [5.51 for P(OPh)3, 10.36 for P(OBu)3, 14.33 for PPh3, 15.49 for PBu3, 18.39 for P(4-Me2NC6H4)3] are compared with the reactivities of other classes of nucleophiles (see, www.cup. uni-muenchen.de/oc/mayr).
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Affiliation(s)
- Bernhard Kempf
- Department Chemie und Biochemie der Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377 München, Germany
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Nanishankar H, Nethaji M, Jagirdar B. Synthesis and Characterization of the First Examples of Dicationic Dihydrogen Complexes of Iron and Ruthenium with the PF
3
Ligand. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200400130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- H. V. Nanishankar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India, Fax: (internat.) + 80‐2360‐0683
| | - Munirathinam Nethaji
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India, Fax: (internat.) + 80‐2360‐0683
| | - Balaji R. Jagirdar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India, Fax: (internat.) + 80‐2360‐0683
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33
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Babij C, Chen L, Koshevoy IO, Poë AJ. QALE analysis of CO dissociative kinetics of Ru(CO)4L (L = P-donor ligands): accelerating effects of hydrogen in PHnR(3 - n) ligands (n = 1-2). Dalton Trans 2004:833-8. [PMID: 15252507 DOI: 10.1039/b315719a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studies of CO-dissociative substitution reactions of the complexes Ru(CO)4L (L = a wide variety of P-donor ligands) have been extended and analysis of the results by the QALE methodology has been refined (QALE = quantitative analysis of ligand effects). Rates increase substantially with increasing size of L, mainly as a consequence of increasingly favourable activation entropies. These can be associated with increasing Ru-CO bond breaking that is compensated enthalpically by increasing Ru-P bond making allowed by release of steric strain. Explicit allowance for pi-acidity shows that these effects are just significant while sigma-donor and aryl effects are negligible. However, pendent hydrogen atoms, attached directly to the phosphorus atoms, have a pronounced and unique positive effect on the rates, with significant kinetic isotope effects (KIE). This is associated with the novel occurrence of direct Ru-H or incipient Ru-(eta2-P-H) agostic bond making as the CO ligand departs.
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Affiliation(s)
- Claudia Babij
- Lash Miller Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Canada M5S 3H6
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34
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Bunten KA, Farrar DH, Poë AJ. Potential Energy Surfaces in Transition States for Associative Reactions of Metal Carbonyl Clusters: Reactions of Rh4(CO)12 with P-Donor Nucleophiles. Organometallics 2003. [DOI: 10.1021/om030071h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin A. Bunten
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - David H. Farrar
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Anthony J. Poë
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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35
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Zhou HC, Holm RH. Synthesis and reactions of cubane-type iron-sulfur-phosphine clusters, including soluble clusters of nuclearities 8 and 16. Inorg Chem 2003; 42:11-21. [PMID: 12513073 DOI: 10.1021/ic020464t] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A family of soluble, reduced iron-sulfur clusters with nuclearities 4, 8, and 16 having tertiary phosphine ligation and based on the Fe(4)S(4) cubane-type structural motif has been synthesized. The results of this investigation substantially extend and improve the results of our original work on iron-sulfur-phosphine clusters (Goh, C.; Segal, B. M.; Huang, J.; Long, J. R.; Holm, R. H. J. Am. Chem. Soc. 1996, 118, 11844). A general property of this cluster family is facile phosphine substitution. The clusters [Fe(4)S(4)(PR(3))(4)](+) are precursors to monosubstituted [Fe(4)S(4)(PR(3))(3)X] (X = Cl-, RS-), homoleptic [Fe(4)S(4)(SR)(4)](3-), and all-ferrous monocubanes [Fe(4)S(4)(PR(3))(4)] (R = Pr(i), Cy, Bu(t); generated in solution). In turn, [Fe(4)S(4)(PPr(i)()(3))(3)(SSiPh(3))] and [Fe(4)S(4)(PPr(i)(3))(4)] can be transformed into the dicubanes [Fe(8)S(8)(PPr(i)()(3))(4)(SSiPh(3))(2)] and [Fe(8)S(8)(PPr(i)((3))(6)], respectively. Further, the tetracubanes [Fe(16)S(16)(PR(3))(8)] are also accessible from [Fe(4)S(4)(PR(3))(4)] under different conditions. X-ray structures are described for [Fe(4)S(4)(PCy(3))(3)X] (X = Cl-, PhS-), [Fe(8)S(8)(PPr(i)(3))(4)(SSiPh(3))(2)], [Fe(8)S(8)(PPr(i)()(3))(6)], and [Fe(16)S(16)(PCy(3))(8)]. The monosubstituted clusters show different distortions of the [Fe(4)S(4)](+) cores from idealized cubic symmetry. The dicubanes possess edge-bridged double cubane structures with an Fe(2)(mu(4)-S)(2) bridge rhomb and idealized C(2)(h)() symmetry. The ready cleavage of these clusters into single cubanes is considered a probable consequence of strained bond angles at the mu(4)-S atoms. Tetracubanes contain four individual cubanes, each of which is implicated in two bridge rhombs so as to generate a cyclic structure of idealized D(4) symmetry. Redox properties and Mössbauer spectroscopic parameters are reported. The species [Fe(4)S(4)(PR(3))(4)] (in solution), [Fe(8)S(8)(PR(3))(6)], and [Fe(16)S(16)(PR(3))(8)] are the only synthetic all-ferrous clusters with tetrahedral iron sites that have been isolated. Their utility as precursors to other highly reduced iron-sulfur clusters is under investigation.
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Affiliation(s)
- Hong-Cai Zhou
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
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36
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Babij C, Chen H, Chen L, Poë AJ. Use of QALE to generate potential energy surfaces in transition states: associative reactions of Ru3(CO)12with P-donor nucleophiles. Dalton Trans 2003. [DOI: 10.1039/b304629j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Daura-Oller E, Poblet JM, Bo C. On the importance of electronic and steric effects in the migratory CO insertion step of rhodium–diphosphine catalyzed methanol carbonylation. Dalton Trans 2003. [DOI: 10.1039/b206610f] [Citation(s) in RCA: 16] [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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38
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Tobisch S, Ziegler T. [Ni(0)L]-catalyzed cyclodimerization of 1,3-butadiene: a density functional investigation of the influence of electronic and steric factors on the regulation of the selectivity. J Am Chem Soc 2002; 124:13290-301. [PMID: 12405858 DOI: 10.1021/ja020423w] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a comprehensive theoretical investigation of the influence of the ligand L on the regulation of the product selectivity for the [Ni(0)L]-catalyzed cyclodimerization of 1,3-butadiene. The investigation was based on density functional theory (DFT) and a combined DFT and molecular mechanics (QM/MM) approach for the real [bis(butadiene)Ni(0)L] catalysts with L = PMe(3), I; PPh(3), II; P((i)Pr)(3), III; and P(OPh)(3), IV. The role of electronic and steric effects has been elucidated for all crucial elementary steps of the entire catalytic cycle. Allylic isomerization, allylic enantioface conversion, as well as oxidative coupling are shown to be influenced to a minor extent by electronic and steric effects. In contrast, the ligand's properties have a distinct influence on the preestablished equilibrium between the eta(3),eta(1)(C(1)) and bis-eta(3) forms 2 and 4, respectively, of the [(octadienediyl)Ni(II)L] complex and on the rate-determining reductive elimination following competing routes for generation of either VCH, cis-1,2-DVCB, or cis,cis-COD. Electronic factors are shown to predominantly determine the position of the kinetically mobile 2 right harpoon over left harpoon 4 equilibrium. 4 is the prevailing species for ligands L that are pi-acceptors (L = P(OPh)(3)) or weak sigma-donors (L = PPh(3)), while stronger sigma-donors (L = PMe(3), P((i)Pr)(3)) displace the equilibrium to the left. Steric bulk on the ligand as well as its pi-acceptor ability act to facilitate the reductive elimination, while sigma-donor abilities serve to retard this process. Electronic and steric factors are found to not influence uniformly the reductive elimination routes with either 2 or 4 involved. The regulation of the product selectivity is elucidated on the basis of both thermodynamic and kinetic considerations.
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Affiliation(s)
- Sven Tobisch
- Institut für Anorganische Chemie der Martin-Luther-Universität Halle-Wittenberg, Fachbereich Chemie, Kurt-Mothes-Strasse 2, D-06120 Halle, Germany.
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39
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Stulz E, Maue M, Feeder N, Teat SJ, Ng YF, Bond AD, Darling SL, Sanders JKM. Phosphine and phosphonite complexes of a ruthenium(II) porphyrin. 1. Synthesis, structure, and solution state studies. Inorg Chem 2002; 41:5255-68. [PMID: 12354060 DOI: 10.1021/ic025727y] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have investigated the effect of complexation of different phosphorus ligands on the stability, solid state structure, and spectroscopic properties (NMR, IR, UV-vis) of a 5,15-diphenyl-substituted ruthenium porphyrin, (MeOH)Ru(II)(CO)(DPP) 2 [DPP = 5,15-bis(3',5'-di-tert-butyl)phenyl-2,8,12,18-tetraethyl-3,7,13,17-tetramethylporphyrin]. The ligands used are PPh(3), diphenyl(phenylacetenyl)phosphine (DPAP), bis(diphenylphosphino)acetylene (DPPA), tris(phenylacetenyl)phosphine [(PA)(3)P], and diethyl (phenylacetenyl)phosphonite [PAP(OEt)(2)]. The mono-phosphine complexes (PR(3))Ru(II)(CO)(DPP) are readily formed in solution in quantitative yields. The complexes display association constants ranging from 1.2 x 10(4) M(-1) for PPh(3) to 4.8 x 10(6) M(-1) for PAP(OEt)(2). The weak association of PPh(3) does not correlate with its pK(a), delta((31)P), or cone angle value and is attributed to steric effects. Due to their kinetic lability, which is shown by 2D NMR spectroscopy, and the weakening of the carbonyl ligand via a trans effect, the mono-phosphine complexes could not be isolated. IR spectroscopy gives the relative order of pi-acceptor strength as PPh(3) < DPAP, DPPA < (PA)(3)P < PAP(OEt)(2), whereas the relative order of the sigma-donor strength is PPh(3) < (PA)(3)P < DPAP, DPPA < PAP(OEt)(2), based on the calculated pK(a) values and on the (31)P((1)H) NMR chemical shifts of the ligands. The chemical shift differences in the (31)P9(1)H)) NMR spectra upon ligand binding display a linear correlation with the calculated pK(a) values of the protonated ligands HPR(3)(+); we propose that the pK(a), and probably other electronic properties, of a specific phosphorus ligand can be estimated on the basis of the chemical shift difference Deltadelta((31)P) upon complexation to a metalloporphyrin. The bis-phosphine complexes can be isolated in pure form by crystallization from CHCl(3)-MeOH solutions using excess ligand. Association of the second ligand is in the same order of magnitude as the first binding for the phosphines, but the second phosphonite binding is decreased by a factor of about 100. The solid state structures show only marginal differences in the geometrical parameters. The calculated and the crystallographic cone angles of the ligands generally do not match, apart from the values obtained for PAP(OEt)(2).
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Affiliation(s)
- Eugen Stulz
- University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, U.K.
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40
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Wilson MR, Prock A, Giering WP, Fernandez AL, Haar CM, Nolan SP, Foxman BM. π Effects Involving Rh−PZ3 Compounds. The Quantitative Analysis of Ligand Effects (QALE). Organometallics 2002. [DOI: 10.1021/om011035q] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02154-9110
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41
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Reyes C, Prock A, Giering WP. Kinetic Study of the Hydrosilylation of Acetophenone by [Rh(cod)Cl]2/(R)-BINAP. Organometallics 2002. [DOI: 10.1021/om0106682] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Clementina Reyes
- Department of Chemistry, Metcalf Science and Engineering Center, Boston University, Boston, Massachusetts 02215
| | - Alfred Prock
- Department of Chemistry, Metcalf Science and Engineering Center, Boston University, Boston, Massachusetts 02215
| | - Warren P. Giering
- Department of Chemistry, Metcalf Science and Engineering Center, Boston University, Boston, Massachusetts 02215
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42
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Huynh MHV, Smyth J, Wetzler M, Mort B, Gong PK, Witham LM, Jameson DL, Geiger DK, Lasker JM, Charepoo M, Gornikiewicz M, Cintron JM, Imahori G, Sanchez RR, Marschilok AC, Krajkowski LM, Churchill DG, Churchill MR, Takeuchi KJ. Remarkable Rate Enhancement of Ligand Substitution Promoted by Geometrical Arrangement of Tridentate “Spectator” Ligands. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20011203)113:23<4601::aid-ange4601>3.0.co;2-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Fernandez AL, Wilson MR, Prock A, Giering WP. Evaluation of the Stereoelectronic Parameters of Fluorinated Phosphorus(III) Ligands. The Quantitative Analysis of Ligand Effects (QALE). Organometallics 2001. [DOI: 10.1021/om010057+] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Berning DE, Miedaner A, Curtis CJ, Noll BC, Rakowski DuBois MC, DuBois DL. Free-Energy Relationships between the Proton and Hydride Donor Abilities of [HNi(diphosphine)2]+ Complexes and the Half-Wave Potentials of Their Conjugate Bases. Organometallics 2001. [DOI: 10.1021/om0100582] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Douglas E. Berning
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado
| | - Alex Miedaner
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado
| | - Calvin J. Curtis
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado
| | - Bruce C. Noll
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado
| | - Mary C. Rakowski DuBois
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado
| | - Daniel L. DuBois
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado
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