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Olivieri D, Tarroni R, Della Ca' N, Mancuso R, Gabriele B, Spadoni G, Carfagna C. Bis‐Alkoxycarbonylation of Acrylic Esters and Amides for the Synthesis of 2‐Alkoxycarbonyl or 2‐Carbamoyl Succinates. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Diego Olivieri
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| | - Riccardo Tarroni
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| | - Nicola Della Ca'
- Department of Chemistry, Life Sciences and Environmental Sustainability (SCVSA) University of Parma Parco Area delle Scienze 17A 43124 Parma Italy
| | - Raffaella Mancuso
- Department of Chemistry and Chemical Technologies University of Calabria Via P. Bucci 12/C 87036 Arcavacata di Rende (CS) Italy
| | - Bartolo Gabriele
- Department of Chemistry and Chemical Technologies University of Calabria Via P. Bucci 12/C 87036 Arcavacata di Rende (CS) Italy
| | - Gilberto Spadoni
- Department of Biomolecular Sciences University of Urbino “Carlo Bo” Piazza Rinascimento 6 61029 Urbino (PU) Italy
| | - Carla Carfagna
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
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Milocco F, de Vries F, Dall'Anese A, Rosar V, Zangrando E, Otten E, Milani B. Palladium alkyl complexes with a formazanate ligand: synthesis, structure and reactivity. Dalton Trans 2018; 47:14445-14451. [DOI: 10.1039/c8dt03130d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthesis of formazanate palladium complexes is reported. Ligand-based redox-reactions and insertions of unsaturated substrates into the Pd–CH3 bond are studied.
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Affiliation(s)
- Francesca Milocco
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
- Stratingh Institute for Chemistry
| | - Folkert de Vries
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
- Stratingh Institute for Chemistry
| | - Anna Dall'Anese
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Vera Rosar
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Ennio Zangrando
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Edwin Otten
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Barbara Milani
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
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Zhao Q, Tognetti V, Joubert L, Besset T, Pannecoucke X, Bouillon JP, Poisson T. Palladium-Catalyzed Synthesis of 3-Trifluoromethyl-Substituted 1,3-Butadienes by Means of Directed C-H Bond Functionalization. Org Lett 2017; 19:2106-2109. [PMID: 28378584 DOI: 10.1021/acs.orglett.7b00704] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A palladium-catalyzed C-H bond functionalization of acrylamides was developed to build up stereoselectively trifluoromethylated 1,3-butadienes. Using a tertiary amide as a directing group, olefins were selectively functionalized with 2-bromo-3,3,3-trifluoropropene to access these important fluorinated compounds. The methodology was extended to the construction of pentafluoroethyl-substituted 1,3-dienes. Mechanistic studies supported by density functional theory calculations suggested a redox neutral mechanism for this transformation.
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Affiliation(s)
- Qun Zhao
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Vincent Tognetti
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Laurent Joubert
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Tatiana Besset
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Xavier Pannecoucke
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Jean-Philippe Bouillon
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Thomas Poisson
- Normandie Université, INSA Rouen , UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
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Zhao Q, Besset T, Poisson T, Bouillon JP, Pannecoucke X. Palladium-Catalysed Synthesis of α-(Trifluoromethyl)styrenes by Means of Directed C-H Bond Functionalization. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501217] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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6
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Broere DLJ, Demeshko S, de Bruin B, Pidko EA, Reek JNH, Siegler MA, Lutz M, van der Vlugt JI. Dinuclear palladium complexes with two ligand-centered radicals and a single bridging ligand: subtle tuning of magnetic properties. Chemistry 2015; 21:5879-86. [PMID: 25735905 DOI: 10.1002/chem.201500084] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Indexed: 12/29/2022]
Abstract
The facile and tunable preparation of unique dinuclear [(L(⋅))Pd-X-Pd(L(⋅))] complexes (X = Cl or N3), bearing a ligand radical on each Pd, is disclosed, as well as their magnetochemistry in solution and solid state is reported. Chloride abstraction from [PdCl(NNO(ISQ))] (NNO(ISQ) = iminosemiquinonato) with TlPF6 results in an unusual monochlorido-bridged dinuclear open-shell diradical species, [{Pd(NNO(ISQ))}2(μ-Cl)](+), with an unusually small Pd-Cl-Pd angle (ca. 93°, determined by X-ray). This suggests an intramolecular d(8)-d(8) interaction, which is supported by DFT calculations. SQUID measurements indicate moderate antiferromagnetic spin exchange between the two ligand radicals and an overall singlet ground state in the solid state. VT EPR spectroscopy shows a transient signal corresponding to a triplet state between 20 and 60 K. Complex 2 reacts with PPh3 to generate [Pd(NNO(ISQ))(PPh3)](+) and one equivalent of [PdCl(NNO(ISQ))]. Reacting an 1:1 mixture of [PdCl(NNO(ISQ))] and [Pd(N3)(NNO(ISQ))] furnishes the 1,1-azido-bridged dinuclear diradical [{Pd(NNO(ISQ))}2(κ(1)-N;μ-N3](+), with a Pd-N-Pd angle close to 127° (X-ray). Magnetic and EPR measurements indicate two independent S = 1/2 spin carriers and no magnetic interaction in the solid state. The two diradical species both show no spin exchange in solution, likely because of unhindered rotation around the Pd-X-Pd core. This work demonstrates that a single bridging atom can induce subtle and tunable changes in structural and magnetic properties of novel dinuclear Pd complexes featuring two ligand-based radicals.
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Affiliation(s)
- Daniël L J Broere
- Homogeneous, Bioinspired & Supramolecular Catalysis van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam (The Netherlands)
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Khusnutdinova JR, Rath NP, Mirica LM. The Conformational Flexibility of the Tetradentate Ligand tBuN4 is Essential for the Stabilization of (tBuN4)PdIII Complexes. Inorg Chem 2014; 53:13112-29. [DOI: 10.1021/ic5023054] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julia R. Khusnutdinova
- Department of Chemistry, Washington University, One Brookings Drive, St.
Louis, Missouri 63130-4899, United States
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry, University of Missouri, One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Liviu M. Mirica
- Department of Chemistry, Washington University, One Brookings Drive, St.
Louis, Missouri 63130-4899, United States
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Garcı́a-López JA, Oliva-Madrid MJ, Saura-Llamas I, Bautista D, Vicente J. Room-Temperature Isolation of Palladium(II) Organocarbonyl Intermediates in the Synthesis of Eight-Membered Lactams after Alkyne/CO Sequential Insertions. Organometallics 2013. [DOI: 10.1021/om301241n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- José-Antonio Garcı́a-López
- Grupo de Quı́mica
Organometálica, Departamento
de Quı́mica Inorgánica, Facultad de
Quı́mica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Marı́a-José Oliva-Madrid
- Grupo de Quı́mica
Organometálica, Departamento
de Quı́mica Inorgánica, Facultad de
Quı́mica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Isabel Saura-Llamas
- Grupo de Quı́mica
Organometálica, Departamento
de Quı́mica Inorgánica, Facultad de
Quı́mica, Universidad de Murcia, E-30071 Murcia, Spain
| | | | - José Vicente
- Grupo de Quı́mica
Organometálica, Departamento
de Quı́mica Inorgánica, Facultad de
Quı́mica, Universidad de Murcia, E-30071 Murcia, Spain
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Nakamura A, Munakata K, Ito S, Kochi T, Chung LW, Morokuma K, Nozaki K. Pd-Catalyzed Copolymerization of Methyl Acrylate with Carbon Monoxide: Structures, Properties and Mechanistic Aspects toward Ligand Design. J Am Chem Soc 2011; 133:6761-79. [DOI: 10.1021/ja2003268] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Akifumi Nakamura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kagehiro Munakata
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shingo Ito
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takuya Kochi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Lung Wa Chung
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishishiraki-cho, 34-4, Sakyo-ku, Kyoto 606-8103, Japan
| | - Keiji Morokuma
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishishiraki-cho, 34-4, Sakyo-ku, Kyoto 606-8103, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Chen S, Pullarkat SA, Li Y, Leung PH. Asymmetric Synthesis of P-Stereogenic Homo- and Heterobimetallic Complexes via Selective Monoinsertion of Dialkynylphosphine into the Pd−C Bond of a Palladacycle. Organometallics 2011. [DOI: 10.1021/om101078p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shuli Chen
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Sumod A. Pullarkat
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Pak-Hing Leung
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371
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Pawlak T, Pazderski L, Sitkowski J, Kozerski L, Szłyk E. 1H, 13C, 195Pt and 15N NMR structural correlations in Pd(II) and Pt(II) chloride complexes with various alkyl and aryl derivatives of 2,2'-bipyridine and 1,10-phenanthroline. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2011; 49:59-64. [PMID: 21254225 DOI: 10.1002/mrc.2704] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 10/19/2010] [Accepted: 10/28/2010] [Indexed: 05/30/2023]
Abstract
(1)H, (13)C, (195)Pt and (15)N NMR studies of platinide(II) (M = Pd, Pt) chloride complexes with such alkyl and aryl derivatives of 2,2'-bipyridine and 1,10-phenanthroline as LL = 6,6'-dimethyl-bpy, 5,5'-dimethyl-bpy, 4,4'-di-tert-butyl-bpy, 2,9-dimethyl-phen, 2,9-dimethyl-4,7-diphenyl-phen, 3,4,7,8-tetramethyl-phen, having the general [M(LL)Cl(2)] formula were performed and the respective chemical shifts (δ(1H), δ(13C), δ(195Pt), δ(15N)) reported. (1)H high-frequency coordination shifts (Δ(coord)(1H) = δ(complex)(1H)-δ(ligand)(1H)) mostly pronounced for nitrogen-adjacent protons and methyl groups in the nearest adjacency of nitrogen, as well as (15)N low-frequency coordination shifts (Δ(coord)(15H) = δ(complex)(15H)-δ(ligand)(15H)) were discussed in relation to the molecular structures.
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Affiliation(s)
- Tomasz Pawlak
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland
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Feng C, Loh TP. Palladium-Catalyzed Bisolefination of C−C Triple Bonds: A Facile Method for the Synthesis of Naphthalene Derivatives. J Am Chem Soc 2010; 132:17710-2. [DOI: 10.1021/ja108998d] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chao Feng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Teck-Peng Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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13
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Ito S, Nozaki K. Coordination-insertion copolymerization of polar vinyl monomers by palladium catalysts. CHEM REC 2010; 10:315-25. [DOI: 10.1002/tcr.201000032] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Omae I. Carbonyl group-containing organometallic intramolecular-coordination five-membered ring compounds. Appl Organomet Chem 2010. [DOI: 10.1002/aoc.1630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Nakamura A, Ito S, Nozaki K. Coordination−Insertion Copolymerization of Fundamental Polar Monomers. Chem Rev 2009; 109:5215-44. [DOI: 10.1021/cr900079r] [Citation(s) in RCA: 696] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Akifumi Nakamura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
| | - Shingo Ito
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
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Meredith JM, Goldberg KI, Kaminsky W, Heinekey DM. Dinuclear Iridium Complexes Containing Cp* and Carbonyl Ligands: Synthesis, Structure, and Reactivity. Organometallics 2009. [DOI: 10.1021/om900186j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph M. Meredith
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700
| | - Karen I. Goldberg
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700
| | - D. Michael Heinekey
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700
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Curley JJ, Kitiachvili KD, Waterman R, Hillhouse GL. Sequential Insertion Reactions of Carbon Monoxide and Ethylene into the Ni−C Bond of a Cationic Nickel(II) Alkyl Complex. Organometallics 2009. [DOI: 10.1021/om900023y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John J. Curley
- Department of Chemistry, Gordon Center for Integrative Science, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637
| | - Kristina D. Kitiachvili
- Department of Chemistry, Gordon Center for Integrative Science, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637
| | - Rory Waterman
- Department of Chemistry, Gordon Center for Integrative Science, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637
| | - Gregory L. Hillhouse
- Department of Chemistry, Gordon Center for Integrative Science, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637
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Nakamura A, Munakata K, Kochi T, Nozaki K. Regiocontrolled Copolymerization of Methyl Acrylate with Carbon Monoxide. J Am Chem Soc 2008; 130:8128-9. [DOI: 10.1021/ja802161n] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akifumi Nakamura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
| | - Kagehiro Munakata
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
| | - Takuya Kochi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan
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Isolation and crystallographic characterization of solvate- and anion-stabilized PCP pincer complexes of palladium(II). J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2007.11.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pazderski L, Tousek J, Sitkowski J, Kozerski L, Szłyk E. Experimental and quantum-chemical studies of 1H, 13C and 15N NMR coordination shifts in Pd(II) and Pt(II) chloride complexes with methyl and phenyl derivatives of 2,2'-bipyridine and 1,10-phenanthroline. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2007; 45:1045-1058. [PMID: 18044804 DOI: 10.1002/mrc.2104] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
1H, 13C and 15N NMR studies of platinide(II) (M=Pd, Pt) chloride complexes with methyl and phenyl derivatives of 2,2'-bipyridine and 1,10-phenanthroline [LL=4,4'-dimethyl-2,2'-bipyridine (dmbpy); 4,4'-diphenyl-2,2'-bipyridine (dpbpy); 4,7-dimethyl-1,10-phenanthroline (dmphen); 4,7-diphenyl-1,10-phenanthroline (dpphen)] having a general [M(LL)Cl2] formula were performed and the respective chemical shifts (delta1H, delta13C, delta15N) reported. 1H high-frequency coordination shifts (Delta1Hcoord=delta1Hcomplex-delta1Hligand) were discussed in relation to the changes of diamagnetic contribution in the relevant 1H shielding constants. The comparison to literature data for similar [M(LL)(XX)], [M(LL)X2] and [M(LL)XY] coordination or organometallic compounds containing various auxiliary ligands revealed a large dependence of delta1H parameters on inductive and anisotropic effects. 15N low-frequency coordination shifts (Delta15Ncoord=delta 15Ncomplex-delta15Nligand) of ca 88-96 ppm for M=Pd and ca 103-111 ppm for M=Pt were attributed to both the decrease of the absolute value of paramagnetic contribution and the increase of the diamagnetic term in the expression for 15N shielding constants. The absolute magnitude of Delta15Ncoord parameter increased by ca 15 ppm upon Pd(II)-->Pt(II) transition and by ca 6-7 ppm following dmbpy-->dmphen or dpbpy-->dpphen ligand replacement; variations between analogous complexes containing methyl and phenyl ligands (dmbpy vs dpbpy; dmphen vs dpphen) did not exceed+/-1.5 ppm. Experimental 1H, 13C, 15N NMR chemical shifts were compared to those quantum-chemically calculated by B3LYP/LanL2DZ+6-31G**//B3LYP/LanL2DZ+6-31G*, both in vacuo and in DMSO or DMF solution.
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Affiliation(s)
- Leszek Pazderski
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland.
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Vela J, Lief GR, Shen Z, Jordan RF. Ethylene Polymerization by Palladium Alkyl Complexes Containing Bis(aryl)phosphino-toluenesulfonate Ligands. Organometallics 2007. [DOI: 10.1021/om700869c] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Javier Vela
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Graham R. Lief
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Zhongliang Shen
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Richard F. Jordan
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
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Zuidema E, Bo C, van Leeuwen PWNM. Ester versus Polyketone Formation in the Palladium−Diphosphine Catalyzed Carbonylation of Ethene. J Am Chem Soc 2007; 129:3989-4000. [PMID: 17348651 DOI: 10.1021/ja0684500] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The origin of the chemoselectivity of palladium catalysts containing bidentate phosphine ligands toward either methoxycarbonylation of ethene or the copolymerization of ethene and carbon monoxide was investigated using density functional theory based calculations. For a palladium catalyst containing the electron-donating bis(dimethylphosphino)ethane (dmpe) ligand, the rate determining step for chain propagation is shown to be the insertion of ethene into the metal-acyl bond. The high barrier for chain propagation is attributed to the low stability of the ethene intermediate, (dmpe)Pd(ethene)(C(O)CH3). For the competing methanolysis process, the most likely pathway involves the formation of (dmpe)Pd(CH3OH)(C(O)CH3) via dissociative ligand exchange, followed by a solvent mediated proton-transfer/reductive- elimination process. The overall barrier for this process is higher than the barrier for ethene insertion into the palladium-acetyl bond, in line with the experimentally observed preference of this type of catalyst toward the formation of polyketone. Electronic bite angle effects on the rates of ethene insertion and ethanoyl methanolysis were evaluated using four electronically and sterically related ligands (Me)2P(CH2)nP(Me)2 (n = 1-4). Steric effects were studied for larger tert-butyl substituted ligands using a QM/MM methodology. The results show that ethene coordination to the metal center and subsequent insertion into the palladium-ethanoyl bond are disfavored by the addition of steric bulk around the metal center. Key intermediates in the methanolysis mechanism, on the other hand, are stabilized because of electronic effects caused by increasing the bite angle of the diphosphine ligand. The combined effects explain successfully which ligands give polymer and which ones give methyl propionate as the major products of the reaction.
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Affiliation(s)
- Erik Zuidema
- Van't Hoff Institute for Molecular Sciences, Universiteit van Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
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Wu F, Jordan RF. Acrylonitrile Insertion Reactions of Palladium Alkyl Complexes that Contain Neutral or Anionic Bidentate Phosphine Ligands. Organometallics 2006. [DOI: 10.1021/om060640w] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fan Wu
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Richard F. Jordan
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
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24
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Carfagna C, Gatti G, Mosca L, Paoli P, Guerri A. Insertion Reactions of 1,2-Disubstituted Olefins with anα-Diimine Palladium(II) Complex. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690164] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Benito JM, de Jesús E, de la Mata FJ, Flores JC, Gómez R. Neutral and Cationic Dendritic Palladium(II) Complexes Containing N,N‘-Iminopyridine Chelating Ligands. Synthesis and Their Use for the Syndiospecific Copolymerization of CO/4-tert-Butylstyrene. Organometallics 2006. [DOI: 10.1021/om0601044] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José M. Benito
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
| | - Ernesto de Jesús
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
| | - F. Javier de la Mata
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
| | - Juan C. Flores
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
| | - Rafael Gómez
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
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26
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Palladium complexes containing ligands with hydrogen-bonding functionalities. Reactivity and catalytic studies with CO and olefins. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.03.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Abstract
A strategy in which C-H activation reactions promoted by Pd(II) have been combined with beta-heteroatom elimination to create a catalytic cycle achieving the arylation of haloacrylates is reported. The catalytic cycle can be subdivided into four parts: (1) C-H activation; (2) the functionalization step, migratory insertion of the olefin into a metal-carbon bond; (3) beta-heteroatom elimination; and (4) exchange of metal halide (if X = halogen) for a less coordinating anion. In this catalytic cycle, the oxidation state of the metal does not change, and an oxidant is not required. The method is more functional group tolerant compared with the existing alkene-arene coupling methods based on electrophilic C-H activation.
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Affiliation(s)
- Vladimir G Zaitsev
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, USA
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28
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Groux LF, Weiss T, Reddy DN, Chase PA, Piers WE, Ziegler T, Parvez M, Benet-Buchholz J. Insertion of Acrylonitrile into Palladium Methyl Bonds in Neutral and Anionic Pd(II) Complexes. J Am Chem Soc 2005; 127:1854-69. [PMID: 15701021 DOI: 10.1021/ja044119+] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions of a series of Pd(II) methyl compounds of general formula LPd(NCCH(3))CH(3), where L is a bulky phenoxydiazene or phenoxyaldimine ligand with the polar olefin acrylonitrile (AN), are reported. The compounds react with an excess of AN to give the products of 2,1 insertion into the Pd-Me bond, yielding dimers and/or trimers which feature bridging alpha-cyano groups. The reactions were studied by low temperature (1)H NMR spectroscopy, revealing an initial formation of compounds featuring N-bound AN, which isomerized to an (unobserved) pi-bound species that rapidly underwent 2,1 insertion into the Pd-Me bond. Intermediate oligomeric complexes retaining a Pd-Me function were observed at low [AN] in these reactions. Under pseudo first-order conditions, k(obs) values of 8.5 x 10(-5) to 2.68 x 10(-3) M(-1) (-22 degrees C to 10 degrees C, 100 equiv of AN) and activation parameters of DeltaH++ = 14.4(5) kcal mol(-1) and DeltaS++ = -19(5) eu were obtained in one case. Comparison of the overall rates of insertion between two LPd(NCCH(3))CH(3), differing in the overall charge on the supporting ligand L, showed that the complex bearing a negatively charged ligand reacts with AN twice as fast as one with no anionic charge. The rates of insertion in both of these complexes are significantly faster than reported rates for analogous reactions in cationic Pd(II) derivatives, indicating that increasing the negative charge on the complex enhances the rate of AN insertion. These results provide fundamental mechanistic insights into a crucial reaction for incorporation of polar comonomers into alpha olefins via a coordination polymerization mechanism.
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Affiliation(s)
- Laurent F Groux
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
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29
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Wu F, Foley SR, Burns CT, Jordan RF. Acrylonitrile Insertion Reactions of Cationic Palladium Alkyl Complexes. J Am Chem Soc 2005; 127:1841-53. [PMID: 15701020 DOI: 10.1021/ja044122t] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of acrylonitrile (AN) with "L(2)PdMe+" species were investigated; (L(2) = CH(2)(N-Me-imidazol-2-yl)(2) (a, bim), (p-tolyl)(3)CCH(N-Me-imidazol-2-yl)(2) (b, Tbim), CH(2)(5-Me-2-pyridyl)(2) (c, CH(2)py'(2)), 4,4'-Me(2)-2,2'-bipyridine (d), 4,4'-(t)Bu(2)-2,2'-bipyridine (e), (2,6-(i)Pr(2)-C(6)H(3))N=CMeCMe=N(2,6-(i)Pr(2)-C(6)H(3)) (f)). [L(2)PdMe(NMe(2)Ph)][B(C(6)F(5))(4)] (2a-c) and [{L(2)PdMe}(2)(mu-Cl)][B(C(6)F(5))(4)] (2d-f) react with AN to form N-bound adducts L(2)Pd(Me)(NCCH=CH(2))(+) (3a-f). 3a-e undergo 2,1 insertion to yield L(2)Pd{CH(CN)Et}+, which form aggregates [L(2)Pd{CH(CN)Et}](n)(n)(+) (n = 1-3, 4a-e) in which the Pd units are proposed to be linked by PdCHEtCN- - -Pd bridges. 3f does not insert AN at 23 degrees C. 4a-e were characterized by NMR, ESI-MS, IR and derivatization to L(2)Pd{CH(CN)Et}(PR(3))+ (R = Ph (5a-e), Me (6a-c)). 4a,b react with CO to form L(2)Pd{CH(CN)Et}(CO)+ (7a,b). 7a reacts with CO by slow reversible insertion to yield (bim)Pd{C(=O)CH(CN)Et}(CO)+ (8a). 4a-e do not react with ethylene. (Tbim)PdMe+ coordinates AN more weakly than ethylene, and AN insertion of 3b is slower than ethylene insertion of (Tbim)Pd(Me)(CH(2)=CH(2))(+) (10b). These results show that most important obstacles to insertion polymerization or copolymerization of AN using L(2)PdR+ catalysts are the tendency of L(2)Pd{CH(CN)CH(2)R}+ species to aggregate, which competes with monomer coordination, and the low insertion reactivity of L(2)Pd{CH(CN)CH(2)R}(substrate)+ species.
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Affiliation(s)
- Fan Wu
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, USA
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30
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Setsune JI, Yamauchi T, Tanikawa S, Hirose Y, Watanabe JY. Insertion of CO and Alkenes into the (methyl)Pd Complexes of the Bidentate Porphyrin Ligand. Organometallics 2004. [DOI: 10.1021/om049783d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun-ichiro Setsune
- Department of Chemistry, Faculty of Science, and Graduate School of Science and Technology, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Takashi Yamauchi
- Department of Chemistry, Faculty of Science, and Graduate School of Science and Technology, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Sachiko Tanikawa
- Department of Chemistry, Faculty of Science, and Graduate School of Science and Technology, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Yuka Hirose
- Department of Chemistry, Faculty of Science, and Graduate School of Science and Technology, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Jun-ya Watanabe
- Department of Chemistry, Faculty of Science, and Graduate School of Science and Technology, Kobe University, Nada-ku, Kobe 657-8501, Japan
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31
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Foley SR, Shen H, Qadeer UA, Jordan RF. Generation and Insertion Reactivity of Cationic Palladium Complexes That Contain Halogenated Alkyl Ligands. Organometallics 2003. [DOI: 10.1021/om034211z] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stephen R. Foley
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Han Shen
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Umair A. Qadeer
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
| | - Richard F. Jordan
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637
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