101
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Chen X, Lu Z. Iminophenyl Oxazolinylphenylamine for Enantioselective Cobalt-Catalyzed Hydrosilylation of Aryl Ketones. Org Lett 2016; 18:4658-61. [DOI: 10.1021/acs.orglett.6b02260] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xu Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Zhan Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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102
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VenkatRamani S, Roland CD, Zhang JG, Ghiviriga I, Abboud KA, Veige AS. Trianionic Pincer Complexes of Niobium and Tantalum as Precatalysts for ROMP of Norbornene. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00421] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sudarsan VenkatRamani
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Christopher D. Roland
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - James G. Zhang
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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103
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Pérez-Torrente JJ, Nguyen DH, Jiménez MV, Modrego FJ, Puerta-Oteo R, Gómez-Bautista D, Iglesias M, Oro LA. Hydrosilylation of Terminal Alkynes Catalyzed by a ONO-Pincer Iridium(III) Hydride Compound: Mechanistic Insights into the Hydrosilylation and Dehydrogenative Silylation Catalysis. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00471] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jesús J. Pérez-Torrente
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Duc Hanh Nguyen
- Université Lille, CNRS, Centrale Lille, ENSCL, Université Artois, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS), F-59000 Lille, France
| | - M. Victoria Jiménez
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - F. Javier Modrego
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Raquel Puerta-Oteo
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Daniel Gómez-Bautista
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Manuel Iglesias
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Luis A. Oro
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, Facultad de Ciencias, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
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104
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Hong SY, Kwak J, Chang S. Rhodium-catalyzed selective CH functionalization of NNN tridentate chelating compounds via a rollover pathway. Chem Commun (Camb) 2016; 52:3159-62. [PMID: 26805059 DOI: 10.1039/c5cc09960a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reported herein is the first example of the Rh(NHC)-catalyzed selective bis C-H alkylation of NNN tridentate chelating compounds in reaction with alkenes. The observed excellent site-selectivity can readily be explained by the postulated rollover pathway in the C-H bond activation step. The reaction is highly facile affording bis-alkylated tridentate products in high yields over a broad range of versatile heteroarene substrates and alkene reactants including ethylene gas, thus enabling its applications to be feasible in coordination and synthetic chemistry.
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Affiliation(s)
- Seung Youn Hong
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea. and Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, Korea
| | - Jaesung Kwak
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, Korea and Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea.
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, Korea and Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, Korea.
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105
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Cherry SDT, Kaminsky W, Heinekey DM. Structure of a Novel Rhodium Phosphinite Compound: Agostic Interactions as a Model for an Oxidative Addition Intermediate. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00418] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sophia D. T. Cherry
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - D. Michael Heinekey
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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106
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Sikari R, Sinha S, Jash U, Das S, Brandão P, de Bruin B, Paul ND. Deprotonation Induced Ligand Oxidation in a NiII Complex of a Redox Noninnocent N1-(2-Aminophenyl)benzene-1,2-diamine and Its Use in Catalytic Alcohol Oxidation. Inorg Chem 2016; 55:6114-23. [DOI: 10.1021/acs.inorgchem.6b00646] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Rina Sikari
- Department
of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Suman Sinha
- Department
of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Upasona Jash
- Department
of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Siuli Das
- Department
of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Paula Brandão
- Departamento de Química,
CICECO-Instituto de Materiais de Aveiro,Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Bas de Bruin
- Homogeneous Catalysis Group, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Nanda D. Paul
- Department
of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
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107
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2014. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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108
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Nadif SS, Kubo T, Gonsales SA, VenkatRamani S, Ghiviriga I, Sumerlin BS, Veige AS. Introducing “Ynene” Metathesis: Ring-Expansion Metathesis Polymerization Leads to Highly Cis and Syndiotactic Cyclic Polymers of Norbornene. J Am Chem Soc 2016; 138:6408-11. [DOI: 10.1021/jacs.6b03247] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soufiane S. Nadif
- Center
for Catalysis, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Tomohiro Kubo
- Center for Macromolecular Science & Engineering and George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Stella A. Gonsales
- Center
for Catalysis, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Sudarsan VenkatRamani
- Center
for Catalysis, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center
for Catalysis, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
- Center for Macromolecular Science & Engineering and George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Brent S. Sumerlin
- Center for Macromolecular Science & Engineering and George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Center
for Catalysis, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
- Center for Macromolecular Science & Engineering and George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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109
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Pascualini ME, Stoian SA, Ozarowski A, Abboud KA, Veige AS. Solid State Collapse of a High-Spin Square-Planar Fe(II) Complex, Solution Phase Dynamics, and Electronic Structure Characterization of an Fe(II)2 Dimer. Inorg Chem 2016; 55:5191-200. [DOI: 10.1021/acs.inorgchem.6b00075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matias E. Pascualini
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Sebastian A. Stoian
- National
High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National
High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Khalil A. Abboud
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
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110
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Roland CD, Li H, Abboud KA, Wagener KB, Veige AS. Cyclic polymers from alkynes. Nat Chem 2016; 8:791-6. [DOI: 10.1038/nchem.2516] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 03/22/2016] [Indexed: 02/07/2023]
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111
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Bera S, Maity S, Weyhermüller T, Ghosh P. Radical non-radical states of the [Ru(PIQ)] core in complexes (PIQ = 9,10-phenanthreneiminoquinone). Dalton Trans 2016; 45:8236-47. [PMID: 27103119 DOI: 10.1039/c6dt00091f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
9,10-Phenanthreneiminosemiquinonate anion radical (PIQ˙(-)) complexes of ruthenium of types trans-[Ru(II)(PIQ˙(-))(PPh3)2(CO)Cl] () and trans-[Ru(III)(PIQ˙(-))(PPh3)2Cl2] () are reported. Reactions of and with I2 afford trans-[Ru(III)(PIQ˙(-))(PPh3)2(CO)Cl](+)I3(-)·½CH2Cl2 ((+)I3(-)·½CH2Cl2) and trans-[Ru(PIQ˙(-))2(PPh3)2(μ-Cl)3](+)I3(-)·¼I2·¼toluene) ((+)I3(-)·¼I2·¼toluene), while the reaction of with Br2 yields a 9,10-phenanthreneiminoquinone (PIQ) complex of the type mer-[Ru(III)(PIQ)(PPh3)Br3]·½CH2Cl2 (·½CH2Cl2). In comparison, the reaction of trans-[Ru(III)(PQ˙(-))(PPh3)2Cl2] (PQ), a 9,10-phenanthrenequinone (PQ) analogue of affords only trans-[Ru(III)(PQ)(PPh3)2Cl2](+)Br3(-) ((+)Br3(-)). Considering the X-ray bond parameters, EPR spectra and the atomic spin densities obtained from the density functional theory (DFT) calculations, is defined as a PIQ˙(-) (average C-O/N and C-C lengths, 1.280(2) and 1.453(3) Å) complex of ruthenium(ii) while is a neutral PIQ (average C-O, C-N, C-C and C-O/N lengths, 1.248(7), 1.284(7), 1.485(8) and 1.266(7) Å) complex of the ruthenium(iii) ion. The single crystal X-ray bond parameters proposed that (+)I3(-) (average C-O/N and C-C lengths, 1.294(8) and 1.449(9) Å) and (average C-O/N and C-C lengths, 1.289(2) and 1.447(4) Å) are PIQ˙(-) complexes of ruthenium(iii), while the (+) ion (average C-O/N and C-C lengths, 1.288 ± 0.004 and 1.450 ± 0.017 Å) is a co-facial bi-octahedral complex of ruthenium(iii). In contrast, the (+) ion is a PQ complex of the ruthenium(iii) ion. EPR spectra and the calculated atomic spin densities authenticated that the (+) ion obtained after constant potential coulometric oxidation of is a PIQ complex of ruthenium(iii), while the (-) ion is a hybrid state of [Ru(II)(PIQ˙(-))] and [Ru(III)(PIQ(2-))] states. It is observed that the PIQ˙(-) state in which spin is more localized on the nitrogen (∼38% in and ∼35% in (-) ion) is stable and the coordination of the PIQ(2-) state is not observed in this study. Redox activities, UV-vis/NIR absorption spectra and their origins and the spectroelectrochemical measurements for → (+), → (-) and (+) → (2+) conversions are analyzed.
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Affiliation(s)
- Sachinath Bera
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-103, India.
| | - Suvendu Maity
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-103, India.
| | - Thomas Weyhermüller
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, D-45470 Mülheim, Germany
| | - Prasanta Ghosh
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-103, India.
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112
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Gonsales SA, Kubo T, Flint MK, Abboud KA, Sumerlin BS, Veige AS. Highly Tactic Cyclic Polynorbornene: Stereoselective Ring Expansion Metathesis Polymerization of Norbornene Catalyzed by a New Tethered Tungsten-Alkylidene Catalyst. J Am Chem Soc 2016; 138:4996-9. [DOI: 10.1021/jacs.6b00014] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stella A. Gonsales
- Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Tomohiro Kubo
- Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Madison K. Flint
- Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Brent S. Sumerlin
- Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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113
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Tanahashi H, Ikeda H, Tsurugi H, Mashima K. Synthesis and Characterization of Paramagnetic Tungsten Imido Complexes Bearing α-Diimine Ligands. Inorg Chem 2016; 55:1446-52. [PMID: 26841126 DOI: 10.1021/acs.inorgchem.5b02145] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tungsten imido complexes bearing a redox-active ligand, such as N,N'-bis(2,6-diisopropylphenyl)-1,4-diaza-2,3-dimethyl-1,3-butadiene (L1), N,N'-bis(2,6-diisopropylphenyl)-1,4-diaza-1,3-butadiene (L2), and 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (L3), were prepared by salt-free reduction of W(═NC6H3-2,6-(i)Pr2)Cl4 (1) using 1-methyl-3,6-bis(trimethylsilyl)-1,4-cyclohexadiene (MBTCD) followed by addition of the corresponding redox-active ligands. In the initial stage, reaction of W(═NC6H3-2,6-(i)Pr2)Cl4 with MBTCD afforded a tetranuclear W(V) imido cluster, [W(═NC6H3-2,6-(i)Pr2)Cl3]4 (2), which served as a unique precursor for introducing redox-active ligands to the tungsten center to give the corresponding mononuclear complexes with a general formula of W(═NC6H3-2,6-(i)Pr2)Cl3(L) (3, L = L1; 4, L = L2; and 6, L = L3). X-ray analyses of complexes 3 and 6 revealed a neutral coordination mode of L1 and L3 to the tungsten in solid state, while the electron paramagnetic resonance (EPR) spectra of 3 and 4 clarified that a radical was predominantly located on the tungsten center supported by neutral L1 or L2, and the EPR spectra of complex 6 indicated that a radical was delocalized over both the tungsten center and the monoanionic redox-active ligand L3.
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Affiliation(s)
- Hiromasa Tanahashi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Hideaki Ikeda
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
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114
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Wan L, Zhang D. Brønsted Base-Induced Rearrangement and Nucleophilic Addition of O/N-Functionalized NHCs and Relative Group 4 Metal Complexes for Ethylene Polymerization Catalysis. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00862] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li Wan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, People’s Republic of China
| | - Dao Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, People’s Republic of China
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115
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Abstract
Recent advances in the use of tethered π-coordinating ligands for metal–ligand cooperation.
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Affiliation(s)
- Dide G. A. Verhoeven
- Organic Chemistry & Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- Universiteitsweg 99
- 3584 CG Utrecht
| | - Marc-Etienne Moret
- Organic Chemistry & Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- Universiteitsweg 99
- 3584 CG Utrecht
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116
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Shit M, Maity S, Bera S, Weyhermüller T, Ghosh P. Coordination of o-benzosemiquinonate, o-iminobenzosemiquinonate, 4,4′-di-tert-butyl-2,2′-bipyridine and 1,10-phenanthroline anion radicals to oxidovanadium(iv). NEW J CHEM 2016. [DOI: 10.1039/c6nj02220k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Coordination of semiquinonate and heterocyclic α-diimine anion radicals to oxidovanadium(iv) is authenticated.
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Affiliation(s)
- Madhusudan Shit
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-103
- India
| | - Suvendu Maity
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-103
- India
| | - Sachinath Bera
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-103
- India
| | | | - Prasanta Ghosh
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-103
- India
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117
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Li XR, Chew RJ, Li Y, Leung PH. Investigation of Functional Group Effects on Palladium Catalysed Asymmetric P–H Addition. Aust J Chem 2016. [DOI: 10.1071/ch15577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The pincer catalysed asymmetric P–H addition of diphenylphosphine to 3-benzylidene-2,4-pentadione is herein reported. Albeit successful in catalysing a series of similar substrates, unexpected chelation of the dione substrate to a CP and CN palladacycle catalyst resulted in inactivation of the catalyst with adjacent coordination sites. Protected phosphine adducts were isolated and characterised, providing critical insights to the choice of catalyst for structurally distinct functional groups borne by the substrate.
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118
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Ghorui T, Roy S, Pramanik S, Pramanik K. RhCl(PPh3)3-mediated C–H oxyfunctionalization of pyrrolido-functionalized bisazoaromatic pincers: a combined experimental and theoretical scrutiny of redox-active and spectroscopic properties. Dalton Trans 2016; 45:5720-9. [DOI: 10.1039/c5dt05044h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-trivial coordination mode of symmetrical NNN ligands with Rh(iii) leads to redox-active NNO-scaffolds via C(sp2)–H oxyfunctionalization at rt, opening an opportunity to juxtapose different redox-active domains.
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Affiliation(s)
- Tapas Ghorui
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Sima Roy
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Shuvam Pramanik
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Kausikisankar Pramanik
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata – 700032
- India
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119
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Singh MP, Saleem F, Rao GK, Kumar S, Joshi H, Singh AK. Palladacycles of unsymmetrical (N,C−,E) (E = S/Se) pincers based on indole: their synthesis, structure and application in the catalysis of Heck coupling and allylation of aldehydes. Dalton Trans 2016; 45:6718-25. [DOI: 10.1039/c6dt00060f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Palladacycles of Schiff bases of 1-(2-phenylsulfanyl/selenylethyl)-1H-indole-3-carbaldehyde with benzyl amine catalyze Heck coupling and allylation at 0.1–0.3 and 1.0 mol% respectively.
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Affiliation(s)
- Mahabir P. Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Fariha Saleem
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Gyandshwar K. Rao
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - S. Kumar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Hemant Joshi
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Ajai K. Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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120
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Gonsales SA, Ghiviriga I, Abboud KA, Veige AS. Carbon dioxide cleavage across a tungsten-alkylidyne bearing a trianionic pincer-type ligand. Dalton Trans 2016; 45:15783-15785. [DOI: 10.1039/c6dt01049k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Splitting of CO2 across the tungsten-carbon triple bond in [CF3-ONO]WCCtBu(THF)2 (1) yields the tungsten oxo ketene [CF3-ONO]W(O){(CH3)3CCCO} (6).
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Affiliation(s)
- Stella A. Gonsales
- University of Florida
- Department of Chemistry
- Center for Catalysis
- Gainesville
- USA
| | - Ion Ghiviriga
- University of Florida
- Department of Chemistry
- Center for Catalysis
- Gainesville
- USA
| | - Khalil A. Abboud
- University of Florida
- Department of Chemistry
- Center for Catalysis
- Gainesville
- USA
| | - Adam S. Veige
- University of Florida
- Department of Chemistry
- Center for Catalysis
- Gainesville
- USA
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121
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Nadif SS, O'Reilly ME, Ghiviriga I, Abboud KA, Veige AS. Remote Multiproton Storage within a Pyrrolide-Pincer-Type Ligand. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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122
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Nadif SS, O'Reilly ME, Ghiviriga I, Abboud KA, Veige AS. Remote Multiproton Storage within a Pyrrolide-Pincer-Type Ligand. Angew Chem Int Ed Engl 2015; 54:15138-42. [DOI: 10.1002/anie.201507008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Indexed: 11/08/2022]
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123
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Asay M, Morales-Morales D. Non-symmetric pincer ligands: complexes and applications in catalysis. Dalton Trans 2015; 44:17432-47. [PMID: 26396037 DOI: 10.1039/c5dt02295a] [Citation(s) in RCA: 219] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Pincer ligands have become ubiquitous in organometallic chemistry and homogeneous catalysis. Recently, new varieties of pincer ligands with non-symmetrical backbones and/or ligating groups have been reported and their application in transition metal complexes has been exploited in a variety of catalytic transformations. This non-symmetric approach vastly increases the structural and electronic diversity of this class of ligand. This approach has proven beneficial in a variety of ways, such as the use of a single weakly coordinating moiety, which can dissociate and thereby create a vacant coordination site to increase the catalyst activity. Additionally, this provides further access to chiral ligands and complexes for asymmetric induction. This perspective highlights recent, important examples of non-symmetric pincer ligands, which feature aryl or pyridine backbones, and the synthesis and use of subsequent complexes in catalytic transformations, and discusses the future potential of this type of ligand system.
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Affiliation(s)
- Matthew Asay
- Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Circuito Exterior S/N, Cuidad Universitaria Coyoacan, C.P. 04510, Mexico D.F., Mexico.
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124
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Gonsales SA, Pascualini ME, Ghiviriga I, Veige AS. Evidence for a zwitterionic transition state in double bond rotations within tungsten-vinyl complexes. Chem Commun (Camb) 2015. [PMID: 26214073 DOI: 10.1039/c5cc04851f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trianionic pincer supported tungsten-vinyl complex [CF3-ONO]W(O){(CH3)3CC[double bond, length as m-dash]C(CH3)2} (3syn) undergoes facile double bond rotation at ambient temperature. The degenerate methyl exchange rates were measured via selective inversion-recovery experiments. DFT computations in conjunction with experimentally determined rate constants support a double bond rotation that proceeds via a Zwiterionic transition state.
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Affiliation(s)
- S A Gonsales
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
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125
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Toda T, Kuwata S, Ikariya T. Synthesis and Structures of Ruthenium and Iron Complexes Bearing an Unsymmetrical Pincer-type Ligand with Protic Pyrazole and Tertiary Aminoalkyl Arms. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500558] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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126
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Wang D, Lindeman SV, Fiedler AT. Bimetallic Complexes Supported by a Redox-Active Ligand with Fused Pincer-Type Coordination Sites. Inorg Chem 2015; 54:8744-54. [PMID: 26280846 DOI: 10.1021/acs.inorgchem.5b01380] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The remarkable chemistry of mononuclear complexes featuring tridentate, meridionally chelating "pincer" ligands has stimulated the development of ligand frameworks containing multiple pincer sites. Here, the coordination chemistry of a novel pentadentate ligand (L(N3O2)) that provides two closely spaced NNO pincer-type compartments fused together at a central diarylamido unit is described. The trianionic L(N3O2) chelate supports homobimetallic structures in which each M(II) ion (M = Co, Cu, Zn) is bound in a meridional fashion by the bridging diarylamido N atom and O,N-donors of the salicyaldimine arms. The metal centers are also coordinated by a mono- or bidentate auxiliary ligand (L(aux)), resulting in complexes with the general form [M2(L(N3O2))(L(aux))2](+) (where L(aux) = 1-methyl-benzimidazole (1MeBI), 2,2'-bipyridine (bpy), 4,4'-dibromo-2,2'-bipyridine (bpy(Br2)), or (S)-2-(4-isopropyl-4,5-dihydrooxazolyl)pyridine (S-(iPr)OxPy)). The fused nature of the NNO pincer sites results in short metal-metal distances ranging from 2.70 Å for [Co2(L(N3O2)) (bpy)2](+) to 3.28 Å for [Zn2(L(N3O2)) (bpy)2](+), as revealed by X-ray crystallography. The complexes possess C2 symmetry due to the twisting of the aryl rings of the μ-NAr2 core; spectroscopic studies indicate that chiral L(aux) ligands, such as S-(iPr)OxPy, are capable of controlling the helical sense of the L(N3O2) scaffold. Since the four- or five-coordinate M(II) centers are linked solely by the amido moiety, each features an open coordination site in the intermetallic region, allowing for the possibility of metal-metal cooperativity in small-molecule activation. Indeed, the dicobalt(II) complex [Co2(L(N3O2)) (bpy(Br2))2](+) reacts with O2 to yield a dicobalt(III) species with a μ-1,2-peroxo ligand. The bpy-containing complexes exhibit rich electrochemical properties due to multiple metal- and ligand-based redox events across a wide (3.0 V) potential window. Using electron paramagnetic resonance (EPR) spectroscopy and density functional theory (DFT), it was determined that one-electron oxidation of [Co2(L(N3O2)) (bpy)2](+) results in formation of a S = 1/2 species with a L(N3O2)-based radical coupled to low-spin Co(II) centers.
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Affiliation(s)
- Denan Wang
- Department of Chemistry, Marquette University , Milwaukee, Wisconsin 53201, United States
| | - Sergey V Lindeman
- Department of Chemistry, Marquette University , Milwaukee, Wisconsin 53201, United States
| | - Adam T Fiedler
- Department of Chemistry, Marquette University , Milwaukee, Wisconsin 53201, United States
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127
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Affiliation(s)
- Alexey V. Polukeev
- Centre
for Analysis and Synthesis,
Department of Chemistry, Lund University, P.O. Box 124, S-22100 Lund, Sweden
| | - Ola F. Wendt
- Centre
for Analysis and Synthesis,
Department of Chemistry, Lund University, P.O. Box 124, S-22100 Lund, Sweden
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128
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Modern Organometallic Multidentate Ligand Design Strategies: The Birth of the Privileged “Pincer” Ligand Platform. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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129
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VenkatRamani S, Huff NB, Jan MT, Ghiviriga I, Abboud KA, Veige AS. New Alkylidyne Complexes Featuring a Flexible Trianionic ONO3– Pincer-Type Ligand: Inorganic Enamine Effect versus Sterics in Electrophilic Additions. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00155] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sudarsan VenkatRamani
- Department of Chemistry,
Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Nicholas B. Huff
- Department of Chemistry,
Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Muhammad Tariq Jan
- Department of Chemistry,
Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Department of Chemistry,
Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Department of Chemistry,
Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Department of Chemistry,
Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
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130
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Sattler A, Parkin G. Synthesis, Structural Characterization, and Cyclometalation Chemistry of Tantalum Terphenyl Compounds. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aaron Sattler
- Department
of Chemistry, Columbia University, 3000 Broadway, MC 3115, New York, New York 10027, United States
| | - Gerard Parkin
- Department
of Chemistry, Columbia University, 3000 Broadway, MC 3115, New York, New York 10027, United States
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131
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Nadif SS, Pedziwiatr J, Ghiviriga I, Abboud KA, Veige AS. Synthesis and Characterization of Group 4 Trianionic ONO3– Pincer-Type Ligand Complexes and a Rare Case of Through-Space 19F–19F Coupling. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Soufiane S. Nadif
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Jakub Pedziwiatr
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Center
for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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132
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Goldberg JM, Wong GW, Brastow KE, Kaminsky W, Goldberg KI, Heinekey DM. The Importance of Steric Factors in Iridium Pincer Complexes. Organometallics 2015. [DOI: 10.1021/om501166w] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jonathan M. Goldberg
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Gene W. Wong
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Kenzie E. Brastow
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Karen I. Goldberg
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - D. Michael Heinekey
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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133
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134
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Bellone D, Bours J, Menke EH, Fischer FR. Highly selective molybdenum ONO pincer complex initiates the living ring-opening metathesis polymerization of strained alkynes with exceptionally low polydispersity indices. J Am Chem Soc 2015; 137:850-6. [PMID: 25535767 PMCID: PMC4308759 DOI: 10.1021/ja510919v] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Indexed: 01/19/2023]
Abstract
The pseudo-octahedral molybdenum benzylidyne complex [TolC≡Mo(ONO)(OR)]·KOR (R = CCH3(CF3)2) 1, featuring a stabilizing ONO pincer ligand, initiates the controlled living polymerization of strained dibenzocyclooctynes at T > 60 °C to give high molecular weight polymers with exceptionally low polydispersities (PDI ∼ 1.02). Kinetic analyses reveal that the growing polymer chain attached to the propagating catalyst efficiently limits the rate of propagation with respect to the rate of initiation (kp/ki ∼ 10(-3)). The reversible coordination of KOCCH3(CF3)2 to the propagating catalyst prevents undesired chain-termination and -transfer processes. The ring-opening alkyne metathesis polymerization with 1 has all the characteristics of a living polymerization and enables, for the first time, the controlled synthesis of amphiphilic block copolymers via ROAMP.
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Affiliation(s)
- Donatela
E. Bellone
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Justin Bours
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Elisabeth H. Menke
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Felix R. Fischer
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Kavli
Energy NanoSciences Institute at the University of California Berkeley
and the Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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135
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Iglesias M, Iturmendi A, Sanz Miguel PJ, Polo V, Pérez-Torrente JJ, Oro LA. Tuning PCP–Ir complexes: the impact of an N-heterocyclic olefin. Chem Commun (Camb) 2015; 51:12431-4. [DOI: 10.1039/c5cc04287a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A flexible N-heterocyclic olefin (NHO) allows the adoption of facial coordination modes in Ir(i) or meridional in Ir(iii) complexes due to the dual nature (ylide–olefin) of the NHO scaffold. This results in a rare case of olefin “slippage” that is supported by X-ray crystallography and DFT calculations.
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Affiliation(s)
- Manuel Iglesias
- Departamento Química Inorgánica – ISQCH
- Universidad de Zaragoza – CSIC
- 50009 Zaragoza
- Spain
| | - Amaia Iturmendi
- Departamento Química Inorgánica – ISQCH
- Universidad de Zaragoza – CSIC
- 50009 Zaragoza
- Spain
| | - Pablo J. Sanz Miguel
- Departamento Química Inorgánica – ISQCH
- Universidad de Zaragoza – CSIC
- 50009 Zaragoza
- Spain
| | - Victor Polo
- Departamento Química Física – Instituto de Biocomputación y Física de Sistemas Complejos (BIFI)
- Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | | | - Luis A. Oro
- Departamento Química Inorgánica – ISQCH
- Universidad de Zaragoza – CSIC
- 50009 Zaragoza
- Spain
- Centre of Research Excellence in Petroleum Refining
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136
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VenkatRamani S, Ghiviriga I, Abboud KA, Veige AS. A new ONO3− trianionic pincer ligand with intermediate flexibility and its tungsten alkylidene and alkylidyne complexes. Dalton Trans 2015; 44:18475-86. [DOI: 10.1039/c5dt02911b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This report details the synthesis and characterization of the semi-flexible [ONCH2O]H3 (1) ligand and its W(vi)-alkylidene and alkylidyne complexes.
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Affiliation(s)
| | - Ion Ghiviriga
- Department of Chemistry
- Center for Catalysis
- University of Florida
- Gainesville
- USA
| | - Khalil A. Abboud
- Department of Chemistry
- Center for Catalysis
- University of Florida
- Gainesville
- USA
| | - Adam S. Veige
- Department of Chemistry
- Center for Catalysis
- University of Florida
- Gainesville
- USA
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137
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Arumugam V, Kaminsky W, Nallasamy D. ONO pincer type Pd(ii) complexes: synthesis, crystal structure and catalytic activity towards C-2 arylation of quinoline scaffolds. RSC Adv 2015. [DOI: 10.1039/c5ra15342e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Four new palladium(ii) complexes featuring ONO pincer type hydrazone ligands were synthesized and characterized by spectroscopic and single-crystal XRD analysis. Utility of these complexes to catalyze C–C bond formation in quinoline scaffolds were assessed.
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Affiliation(s)
- Vignesh Arumugam
- Inorganic & Nanomaterials Research Laboratory
- Department of Chemistry
- Bharathiar University
- Coimbatore 641 046
- India
| | | | - Dharmaraj Nallasamy
- Inorganic & Nanomaterials Research Laboratory
- Department of Chemistry
- Bharathiar University
- Coimbatore 641 046
- India
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138
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Gossage RA. Pincer Complexes of Lithium, Sodium, Magnesium and Related Metals: A Discussion of Solution and Solid-State Aggregated Structure and Reactivity. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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139
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Pascualini ME, Di Russo NV, Quintero PA, Thuijs AE, Pinkowicz D, Abboud KA, Dunbar KR, Christou G, Meisel MW, Veige AS. Synthesis, Characterization, and Reactivity of Iron(III) Complexes Supported by a Trianionic ONO3– Pincer Ligand. Inorg Chem 2014; 53:13078-88. [DOI: 10.1021/ic502251p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Dawid Pinkowicz
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland
| | | | - Kim R. Dunbar
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
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140
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Pascualini ME, Di Russo NV, Thuijs AE, Ozarowski A, Stoian SA, Abboud KA, Christou G, Veige AS. A high-spin square-planar Fe(ii) complex stabilized by a trianionic pincer-type ligand and conclusive evidence for retention of geometry and spin state in solution. Chem Sci 2014; 6:608-612. [PMID: 28706628 PMCID: PMC5491960 DOI: 10.1039/c4sc02634a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 10/15/2014] [Indexed: 12/02/2022] Open
Abstract
Extensive spectroscopic evaluation of a novel ONO3– trianionic pincer Fe(ii) complex indicates the rare square-planar geometry and S = 2 spin state are retained in solution.
Square-planar high-spin Fe(ii) molecular compounds are rare and the only three non-macrocyclic or sterically-driven examples reported share a common FeO4 core. Using an easily modifiable pincer-type ligand, the successful synthesis of the first compound of this type that breaks the FeO4 motif was achieved. In addition, we present the first evidence that geometry and spin state persist in solution. Extensive characterization includes the first high-field EPR and variable field/temperature Mössbauer spectra for this class of compounds. Analysis of the spectroscopic data indicates this complex exhibits a large and positive zero-field splitting tensor. Furthermore, the unusually small ΔEQ value determined for this compound is rationalized on the basis of DFT calculations.
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Affiliation(s)
- M E Pascualini
- Department of Chemistry , Center for Catalysis , University of Florida , Gainesville , FL 32611 , USA .
| | - N V Di Russo
- Department of Chemistry , Center for Catalysis , University of Florida , Gainesville , FL 32611 , USA .
| | - A E Thuijs
- Department of Chemistry , Center for Catalysis , University of Florida , Gainesville , FL 32611 , USA .
| | - A Ozarowski
- National High Magnetic Field Laboratory , Florida State University , Tallahassee , FL 32310 , USA
| | - S A Stoian
- National High Magnetic Field Laboratory , Florida State University , Tallahassee , FL 32310 , USA
| | - K A Abboud
- Department of Chemistry , Center for Catalysis , University of Florida , Gainesville , FL 32611 , USA .
| | - G Christou
- Department of Chemistry , Center for Catalysis , University of Florida , Gainesville , FL 32611 , USA .
| | - A S Veige
- Department of Chemistry , Center for Catalysis , University of Florida , Gainesville , FL 32611 , USA .
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