1
|
Abe R, Nagashima Y, Tanaka J, Tanaka K. Room Temperature Fluoranthene Synthesis through Cationic Rh(I)/H 8-BINAP-Catalyzed [2 + 2 + 2] Cycloaddition: Unexpected Acceleration due to Noncovalent Interactions. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Ryota Abe
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Yuki Nagashima
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Jin Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Ken Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| |
Collapse
|
2
|
Harper JL, Felten S, Stolley RM, Hegg AS, Cheong PHY, Louie J. Origins of Regio- and Chemoselectivity in Iron-PDAI-Catalyzed [2+2+2] Cycloaddition Syntheses of 4,6-Disubstituted 2-Aminopyridines. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03871] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jordan L. Harper
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Stephanie Felten
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Ryan M. Stolley
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Alexander S. Hegg
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Paul H.-Y. Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Janis Louie
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| |
Collapse
|
3
|
Orian L, Bickelhaupt FM. Designing Rh(I)-Half-Sandwich Catalysts for Alkyne [2+2+2] Cycloadditions. Synlett 2021. [DOI: 10.1055/s-0040-1707284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractMetal-mediated [2+2+2] cycloadditions of unsaturated molecules to cyclic and polycyclic organic compounds are a versatile synthetic route affording good yields and selectivity under mild conditions. In the last two decades, in silico investigations have unveiled important details about the mechanism and the energetics of the whole catalytic cycle. Particularly, a number of computational studies address the topic of half-sandwich catalysts which, due to their structural fluxionality, have been widely employed, since the 1980s. In these organometallic species, the metal is coordinated to an aromatic ring, typically the ubiquitous cyclopentadienyl anion, C5H5
–(Cp) or to the Cp moiety of a larger polycyclic aromatic ligand (Cp′). During the catalytic process, the metal continuously ‘slips’ on the ring, changing its hapticity. This phenomenon of metal slippage and its implications for the catalyst’s performance are discussed in this work, referring to the most important computational mechanistic studies reported in literature for Rh(I) half-metallocenes, with the purpose of providing hints for a rational design of this class of compounds.1 Introduction2 Mechanism of Metal-Catalyzed Acetylene [2+2+2] Cycloaddition to Benzene and the Problem of the Indenyl Effect2.1 Acetylene-Acetonitrile [2+2+2] Co-cycloaddition to 2-Methylpyridine: Evidence of the Indenyl Effect2.2 Heteroaromatic Catalysts and the Evidence of a Reverse Indenyl Effect2.3 Booth’s Mechanistic Hypothesis and the Evidence of the Indenyl Effect3 Structure–Reactivity Correlation: The Slippage-Span Model4 Conclusions and Perspectives
Collapse
Affiliation(s)
- Laura Orian
- Dipartimento di Scienze Chimiche Università degli Studi di Padova
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam
- Institute of Molecules and Materials, Radboud University
| |
Collapse
|
4
|
Zhang N, Mi J, Huo S, Meng L, Li X. Computational prediction on the catalytic activity of heterobimetallic complex featuring MM' triple bond in acetylene cyclotrimerization: Mechanistic study. J Comput Chem 2021; 42:484-491. [PMID: 33326120 DOI: 10.1002/jcc.26471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/26/2020] [Accepted: 12/01/2020] [Indexed: 11/11/2022]
Abstract
A detailed reaction mechanism of acetylene cyclotrimerization catalyzed by V(i PrNPMe2 )3 Fe-PMe3 (denote as CAT), a heterobimetallic complex featuring V-Fe triple bond, was computationally investigated using density functional theory. The calculated results show that the first acetylene firstly attaches to the V atom of CAT to get a four-membered ring structure through [2 + 2] cycloaddition reaction. For the second acetylene addition, there are two cyclotrimerization mechanisms, outer sphere mechanism and inner mechanism. The inner sphere reaction pathway is the main reaction pathway. By replacing the V with Nb and Ta, Fe with Ru and Os, a series of new catalysts are screened computationally. The calculated results show that, all of the nine heterobimetallic complexes show high activity at mild condition. The energy barrier of the rate determining step is related to the natural population analysis (NPA) charge of M' and the Wiberg bond index (WBI) of M-M' bond. The more negative NPA charge of M' and the smaller WBI of M-M' bond, the lower energy barrier is.
Collapse
Affiliation(s)
- Na Zhang
- College of Chemistry and Material Science, Key Laboratory of Inorganic and Nano Material, Hebei Normal University, Shijiazhuang, China
| | - Jinhui Mi
- College of Chemistry and Material Science, Key Laboratory of Inorganic and Nano Material, Hebei Normal University, Shijiazhuang, China
| | - Suhong Huo
- National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang, China
| | - Lingpeng Meng
- College of Chemistry and Material Science, Key Laboratory of Inorganic and Nano Material, Hebei Normal University, Shijiazhuang, China
| | - Xiaoyan Li
- College of Chemistry and Material Science, Key Laboratory of Inorganic and Nano Material, Hebei Normal University, Shijiazhuang, China
| |
Collapse
|
5
|
Yamamoto Y. Theoretical Study of the Mechanism of Palladium(0)‐Catalyzed Intramolecular [2+2+2] Cycloaddition of Ester‐Substituted Alkynes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences Graduate School of Pharmaceutical Sciences Nagoya University Chikusa 464‐8601 Nagoya Japan
| |
Collapse
|
6
|
Zhang N, Huo S, Meng L, Li X. Nb(
i
PrNPMe
2
)
3
Fe–PMe
3
: A potential high reactivity heterobimetallic catalyst for acetylene cycloadditions. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Na Zhang
- College of Chemistry and Material Science Hebei Normal University Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Suhong Huo
- College of Chemistry and Material Science Hebei Normal University Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Lingpeng Meng
- National Demonstration Center for Experimental Chemistry Hebei Normal University Road East of 2nd Ring South Shijiazhuang 050024 China
| | - Xiaoyan Li
- College of Chemistry and Material Science Hebei Normal University Road East of 2nd Ring South Shijiazhuang 050024 China
| |
Collapse
|
7
|
Roglans A, Pla-Quintana A, Solà M. Mechanistic Studies of Transition-Metal-Catalyzed [2 + 2 + 2] Cycloaddition Reactions. Chem Rev 2020; 121:1894-1979. [DOI: 10.1021/acs.chemrev.0c00062] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Anna Roglans
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| |
Collapse
|
8
|
Tosato M, Asti M, Dalla Tiezza M, Orian L, Häussinger D, Vogel R, Köster U, Jensen M, Andrighetto A, Pastore P, Marco VD. Highly Stable Silver(I) Complexes with Cyclen-Based Ligands Bearing Sulfide Arms: A Step Toward Silver-111 Labeled Radiopharmaceuticals. Inorg Chem 2020; 59:10907-10919. [PMID: 32658468 PMCID: PMC8009516 DOI: 10.1021/acs.inorgchem.0c01405] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
With a half-life of 7.45 days, silver-111 (βmax 1.04 MeV, Eγ 245.4 keV [Iγ 1.24%], Eγ 342.1 keV [Iγ 6.7%]) is a promising candidate for targeted cancer therapy with β- emitters as well as for associated SPECT imaging. For its clinical use, the development of suitable ligands that form sufficiently stable Ag+-complexes in vivo is required. In this work, the following sulfur-containing derivatives of tetraazacyclododecane (cyclen) have been considered as potential chelators for silver-111: 1,4,7,10-tetrakis(2-(methylsulfanyl)ethyl)-1,4,7,10-tetraazacyclododecane (DO4S), (2S,5S,8S,11S)-2,5,8,11-tetramethyl-1,4,7,10-tetrakis(2-(methylsulfanyl)ethyl)-1,4,7,10-tetraazacyclododecane (DO4S4Me), 1,4,7-tris(2-(methylsulfanyl)ethyl)-1,4,7,10-tetraazacyclododecane (DO3S), 1,4,7-tris(2-(methylsulfanyl)ethyl)-10-acetamido-1,4,7,10-tetraazacyclododecane (DO3SAm), and 1,7-bis(2-(methylsulfanyl)ethyl)-4,10,diacetic acid-1,4,7,10-tetraazacyclododecane (DO2A2S). Natural Ag+ was used in pH/Ag-potentiometric and UV-vis spectrophotometric studies to determine the metal speciation existing in aqueous NaNO3 0.15 M at 25 °C and the equilibrium constants of the complexes, whereas NMR and DFT calculations gave structural insights. Overall results indicated that sulfide pendant arms coordinate Ag+ allowing the formation of very stable complexes, both at acidic and physiological pH. Furthermore, radiolabeling, stability in saline phosphate buffer, and metal-competition experiments using the two ligands forming the strongest complexes, DO4S and DO4S4Me, were carried out with [111Ag]Ag+ and promising results were obtained.
Collapse
Affiliation(s)
- Marianna Tosato
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Mattia Asti
- Radiopharmaceutical Chemistry Section, Nuclear Medicine Unit, AUSL-IRCCS di Reggio Emilia, Viale Risorgimento 80, 42122 Reggio Emilia, Italy
| | - Marco Dalla Tiezza
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Laura Orian
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Daniel Häussinger
- Department of Chemistry, University of Basel, St. Johannsring 19, 4056, Basel, Switzerland
| | - Raphael Vogel
- Department of Chemistry, University of Basel, St. Johannsring 19, 4056, Basel, Switzerland
| | - Ulli Köster
- Institut Laue-Langevin, 71 avenue des Martyrs CS 20156, 38042 Grenoble Cedex 9, France
| | - Mikael Jensen
- The Hevesy Laboratory, Department Health Technology, Technical University of Denmark (DTU), Frederiksborgvej 399, 4000, Roskilde, Denmark
| | - Alberto Andrighetto
- Italian Institute of Nuclear Physics, Legnaro National Laboratories, Viale dell'Università 2, 35020 Legnaro (Padova), Italy
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Valerio Di Marco
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| |
Collapse
|
9
|
Morales-Bayuelo A, Sánchez-Márquez J. Discerning the thermal cyclotrimerizations of fluoro- and chloroacetylenes through ELF, NBO descriptors and QTAIM analysis: pseudodiradical character. Heliyon 2020; 6:e04441. [PMID: 32715128 PMCID: PMC7378582 DOI: 10.1016/j.heliyon.2020.e04441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/14/2020] [Accepted: 07/09/2020] [Indexed: 12/05/2022] Open
Abstract
In this study the thermal cyclotrimerization reactions of fluoro- and chloroacetylenes involving regioselectively stepwise {2 + 2} and stepwise {4 + 2} cycloadditions were studied using the topological analysis of the electron localization function (ELF), the quantum theory of atoms in molecules (QTAIM) and natural bond orbital (NBO) analyses. These methodologies have shown that the electronic reorganization in the regioselectively stepwise {2 + 2} and stepwise {4 + 2} cycloadditions may be considered as {2n+2n} and {2π+2n} pseudodiradical process, respectively. Finally, the last phase of this thermal reaction can be understood as an electronic migration process under the pseudodiradical character in the thermal ring-opening reaction, with the subsequent formation of reaction products. In this sense, new insights are reported on the electronic behavior in the bond formation in the thermal cyclotrimerization of fluoroacetylene.
Collapse
Affiliation(s)
- Alejandro Morales-Bayuelo
- Grupo de Investigaciones Básicas y Clínicas de la Universidad del Sinú (GIBACUS), escuela de medicina, Universidad del Sinú, Seccional Cartagena, Colombia
| | - Jesús Sánchez-Márquez
- Departamento de Química-Física, Facultad de Ciencias, Campus Universitario Río San Pedro, Universidad de Cádiz, Cádiz, Spain
| |
Collapse
|
10
|
Nährig F, Gemmecker G, Chung JY, Hütchen P, Lauk S, Klein MP, Sun Y, Niedner-Schatteburg G, Sitzmann H, Thiel WR. Complexes of Platinum Group Elements Containing the Intrinsically Chiral Cyclopentadienide Ligand (CpC)−1. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Florian Nährig
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Gerd Gemmecker
- Technische Universität München, BNMRZ, Fakultät für Chemie, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Jae-Yeon Chung
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Patrick Hütchen
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Sergej Lauk
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Matthias P. Klein
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Yu Sun
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
- Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663 Kaiserslautern, Germany
| | - Helmut Sitzmann
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Werner R. Thiel
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| |
Collapse
|
11
|
Orsino AF, Moret ME. Nickel-Catalyzed Alkyne Cyclotrimerization Assisted by a Hemilabile Acceptor Ligand: A Computational Study. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00172] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Alessio F. Orsino
- Utrecht University, Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Utrecht University, Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| |
Collapse
|
12
|
Heß M, Stennett TE, Fantuzzi F, Bertermann R, Schock M, Schäfer M, Thiess T, Braunschweig H. Diverse ring-opening reactions of rhodium η 4-azaborete complexes. Chem Sci 2020; 11:9134-9140. [PMID: 34123162 PMCID: PMC8163374 DOI: 10.1039/d0sc02283g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Sequential treatment of [Rh(COE)2Cl]2 (COE = cyclooctene) with PiPr3, alkyne derivatives and tBuN
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
BMes (Mes = 2,4,6-trimethylphenyl) provided functionalized rhodium η4-1,2-azaborete complexes of the form (η4-azaborete)RhCl(PiPr3). The scope of this reaction was expanded to encompass alkynes with hydrogen, alkyl, aryl, ferrocenyl, alkynyl, azaborinyl and boronate ester substituents. Treatment of these complexes with PMe3 led to insertion of the rhodium atom into the B–C bond of the BNC2 ring, forming 1-rhoda-3,2-azaboroles. Addition of N-heterocyclic carbenes to azaborete complexes led to highly unusual rearrangements to rhodium η2,κ1-allenylborylamino complexes via deprotonation and C–N bond cleavage. Heating and photolysis of an azaborete complex also led to rupture of the C–N bond followed by subsequent rearrangements, yielding an η4-aminoborylallene complex and two isomeric η4-butadiene complexes. Rhodium η4-azaborete complexes can be transformed into a variety of species with ring-opened, BN-containing ligands by treatment with Lewis bases.![]()
Collapse
Affiliation(s)
- Merlin Heß
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Tom E. Stennett
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Felipe Fantuzzi
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Rüdiger Bertermann
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Marvin Schock
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Marius Schäfer
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Torsten Thiess
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| |
Collapse
|
13
|
Abstract
Metal-catalyzed alkyne [2+2+2] cycloadditions provide a variety of substantial aromatic compounds of interest in the chemical and pharmaceutical industries. Herein, the mechanistic aspects of the acetylene [2+2+2] cycloaddition mediated by bimetallic half-sandwich catalysts [Cr(CO)3IndRh] (Ind = (C9H7)−, indenyl anion) are investigated. A detailed exploration of the potential energy surfaces (PESs) was carried out to identify the intermediates and transition states, using a relativistic density functional theory (DFT) approach. For comparison, monometallic parent systems, i.e., CpRh (Cp = (C5H5)−, cyclopentadienyl anion) and IndRh, were included in the analysis. The active center is the rhodium nucleus, where the [2+2+2] cycloaddition occurs. The coordination of the Cr(CO)3 group, which may be in syn or anti conformation, affects the energetics of the catalytic cycle as well as the mechanism. The reaction and activation energies and the turnover frequency (TOF) of the catalytic cycles are rationalized, and, in agreement with the experimental findings, our computational analysis reveals that the presence of the second metal favors the catalysis.
Collapse
|
14
|
Torres Ò, Fernàndez M, Díaz-Jiménez À, Pla-Quintana A, Roglans A, Solà M. Examining the Factors That Govern the Regioselectivity in Rhodium-Catalyzed Alkyne Cyclotrimerization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00347] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Òscar Torres
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Martí Fernàndez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Àlex Díaz-Jiménez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Anna Roglans
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| |
Collapse
|
15
|
Saito M, Nakada M, Kuwabara T, Owada R, Furukawa S, Narayanan R, Abe M, Hada M, Tanaka K, Yamamoto Y. Inverted Sandwich Rh Complex Bearing a Plumbole Ligand and Its Catalytic Activity. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00339] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Masaichi Saito
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama 338-8570, Japan
| | - Marisa Nakada
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama 338-8570, Japan
| | - Takuya Kuwabara
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama 338-8570, Japan
| | - Ryota Owada
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama 338-8570, Japan
| | - Shunsuke Furukawa
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama 338-8570, Japan
| | - Radhika Narayanan
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachi-Oji, Tokyo 192-0397, Japan
| | - Minori Abe
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachi-Oji, Tokyo 192-0397, Japan
| | - Masahiko Hada
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachi-Oji, Tokyo 192-0397, Japan
| | - Ken Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Furocho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| |
Collapse
|
16
|
Orsino A, Gutiérrez del Campo M, Lutz M, Moret ME. Enhanced Catalytic Activity of Nickel Complexes of an Adaptive Diphosphine-Benzophenone Ligand in Alkyne Cyclotrimerization. ACS Catal 2019; 9:2458-2481. [PMID: 30854242 PMCID: PMC6400243 DOI: 10.1021/acscatal.8b05025] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/29/2019] [Indexed: 12/15/2022]
Abstract
Adaptive ligands, which can adapt their coordination mode to the electronic structure of various catalytic intermediates, offer the potential to develop improved homogeneous catalysts in terms of activity and selectivity. 2,2'-Diphosphinobenzophenones have previously been shown to act as adaptive ligands, the central ketone moiety preferentially coordinating reduced metal centers. Herein, the utility of this scaffold in nickel-catalyzed alkyne cyclotrimerization is investigated. The complex [( p-tolL1)Ni(BPI)] ( p-tolL1 = 2,2'-bis(di(para-tolyl)phosphino)-benzophenone; BPI = benzophenone imine) is an active catalyst in the [2 + 2 + 2] cyclotrimerization of terminal alkynes, selectively affording 1,2,4-substituted benzenes from terminal alkynes. In particular, this catalyst outperforms closely related bi- and tridentate phosphine-based Ni catalysts. This suggests a reaction pathway involving a hemilabile interaction of the C=O unit with the nickel center. This is further borne out by a comparative study of the observed resting states and DFT calculations.
Collapse
Affiliation(s)
- Alessio
F. Orsino
- Utrecht
University, Organic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Faculty
of Science, Universiteitsweg
99, 3584 CG Utrecht, The Netherlands
| | - Manuel Gutiérrez del Campo
- Utrecht
University, Organic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Faculty
of Science, Universiteitsweg
99, 3584 CG Utrecht, The Netherlands
| | - Martin Lutz
- Utrecht
University, Crystal and Structural
Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Utrecht
University, Organic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Faculty
of Science, Universiteitsweg
99, 3584 CG Utrecht, The Netherlands
| |
Collapse
|
17
|
Dalla Tiezza M, Bickelhaupt FM, Orian L. Half-Sandwich Metal-Catalyzed Alkyne [2+2+2] Cycloadditions and the Slippage Span Model. ChemistryOpen 2019; 8:143-154. [PMID: 30740289 PMCID: PMC6356173 DOI: 10.1002/open.201800191] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Indexed: 11/20/2022] Open
Abstract
Half-sandwich RhI compounds display good catalytic activity toward alkyne [2+2+2] cycloadditions. A peculiar structural feature of these catalysts is the coordination of the metal to an aromatic moiety, typically a cyclopentadienyl anion, and, in particular, the possibility to change the bonding mode easily by the metal slipping over this aromatic moiety. Upon modifying the ancillary ligands, or proceeding along the catalytic cycle, hapticity changes can be observed; it varies from η5, if the five metal-carbon distances are identical, through η3+η2, in the presence of allylic distortion, and η3, in the case of allylic coordination, to η1, if a σ metal-carbon bond forms. In this study, we present the slippage span model, derived with the aim of establishing a relationship between slippage variation during the catalytic cycle, quantified in a novel and rigorous way, and the performance of catalysts in terms of turnover frequency, computed with the energy span model. By collecting and comparing new data and data from the literature, we find that the highest performance is associated with the smallest slippage variation along the cycle.
Collapse
Affiliation(s)
- Marco Dalla Tiezza
- Dipartimento di Scienze ChimicheUniversità degli Studi di PadovaVia Marzolo 135129PadovaItaly
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan1083, 1081HVAmsterdamThe Netherlands
- Institute for Molecules and Materials (IMM)Radboud UniversityHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | - Laura Orian
- Dipartimento di Scienze ChimicheUniversità degli Studi di PadovaVia Marzolo 135129PadovaItaly
| |
Collapse
|
18
|
Dalla Tiezza M, Bickelhaupt FM, Orian L. Group 9 Metallacyclopentadienes as Key Intermediates in [2+2+2] Alkyne Cyclotrimerizations. Insight from Activation Strain Analyses. Chemphyschem 2018; 19:1766-1773. [PMID: 29635782 DOI: 10.1002/cphc.201800178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Indexed: 11/10/2022]
Abstract
The intramolecular oxidative coupling converting a bis-acetylene complex of formula CpM (C2 H2 )2 (Cp=C5 H5- ; M=Co, Rh, Ir) into a 16-electron metallacycle is studied in silico. This reaction is paradigmatic in acetylene [2+2+2] cycloaddition to benzene catalyzed by CpM fragments, being the step with the highest activation energy, and thus affecting the whole catalysis. Our activation strain and quantitative molecular orbital (MO) analyses elucidate the mechanistic details and reveal why cobalt performs better than rhodium and iridium catalysts outlining general principles for rational design of catalysts to be used in these processes.
Collapse
Affiliation(s)
- Marco Dalla Tiezza
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129, Padova, Italy
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands.,Institute for Molecules and Materials (IMM), Radboud University, Heyendaalseweg 135, 6525, J Nijmegen, The Netherlands
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129, Padova, Italy
| |
Collapse
|
19
|
Rezaeyani F, Ghiasi R, Fazaeli R, Yousefi M. Substituent Effect on the Stability and 14
N NQR Parameters of Linkage Isomers of Nitriles in a Rhodium Half-Sandwich Metallacycle: A Theoretical Study. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fatemeh Rezaeyani
- Department of Chemistry, Science and Research Branch; Islamic Azad University; Tehran Iran
| | - Reza Ghiasi
- Department of Chemistry, Faculty of Science, East Tehran Branch; Islamic Azad University; Tehran Iran
| | - Reza Fazaeli
- Department of Chemistry, South Tehran Branch; Islamic Azad University; Tehran Iran
| | - Mohammad Yousefi
- Department of Chemistry, Science and Research Branch; Islamic Azad University; Tehran Iran
| |
Collapse
|
20
|
Artigas A, Lledó A, Pla-Quintana A, Roglans A, Solà M. A Computational Study of the Intermolecular [2+2+2] Cycloaddition of Acetylene and C 60 Catalyzed by Wilkinson's Catalyst. Chemistry 2017; 23:15067-15072. [PMID: 28727187 DOI: 10.1002/chem.201702494] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Indexed: 01/09/2023]
Abstract
The functionalization of fullerenes helps to modulate their electronic and physicochemical properties, generating fullerene derivatives with promising features for practical applications. Herein, DFT is used to explore the attachment of a cyclohexadiene ring to C60 through a rhodium-catalyzed intermolecular [2+2+2] cycloaddition of C60 and acetylene. All potential reaction paths are analyzed and it can be concluded that the [2+2+2] cycloaddition of C60 and two acetylene molecules catalyzed by [RhCl(PPh3 )3 ], yielding a cyclohexadiene ring fused to a [6,6] bond of C60 , is energetically feasible.
Collapse
Affiliation(s)
- Albert Artigas
- Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
| | - Agustí Lledó
- Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
| | - Anna Roglans
- Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
| |
Collapse
|
21
|
Cassú D, Parella T, Solà M, Pla-Quintana A, Roglans A. Rhodium-Catalyzed [2+2+2] Cycloaddition Reactions of Linear Allene-Ene-Ynes to afford Fused Tricyclic Scaffolds: Insights into the Mechanism. Chemistry 2017; 23:14889-14899. [DOI: 10.1002/chem.201703194] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 10/19/2022]
Affiliation(s)
- Daniel Cassú
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química; Universitat de Girona (UdG), Facultat de Ciències; C/ Maria Aurèlia Capmany, 69 17003- Girona Spain
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear; Universitat Autònoma de Barcelona (UAB); 08193 Cerdanyola, Barcelona Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química; Universitat de Girona (UdG), Facultat de Ciències; C/ Maria Aurèlia Capmany, 69 17003- Girona Spain
| | - Anna Pla-Quintana
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química; Universitat de Girona (UdG), Facultat de Ciències; C/ Maria Aurèlia Capmany, 69 17003- Girona Spain
| | - Anna Roglans
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química; Universitat de Girona (UdG), Facultat de Ciències; C/ Maria Aurèlia Capmany, 69 17003- Girona Spain
| |
Collapse
|
22
|
Kwon DH, Proctor M, Mendoza S, Uyeda C, Ess DH. Catalytic Dinuclear Nickel Spin Crossover Mechanism and Selectivity for Alkyne Cyclotrimerization. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00978] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Doo-Hyun Kwon
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Matthew Proctor
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Sergio Mendoza
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Christopher Uyeda
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Daniel H. Ess
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| |
Collapse
|
23
|
Baron M, Tubaro C, Cairoli MLC, Orian L, Bogialli S, Basato M, Natile MM, Graiff C. Gold(III) Bis(di-N-heterocyclic carbene) Square Planar Trication with Axial Ligand Interactions with Bromides from Ag/Br Counteranion Assemblies. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Claudia Graiff
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| |
Collapse
|
24
|
|
25
|
Bottari G, Santos LL, Posadas CM, Campos J, Mereiter K, Paneque M. Reaction of [TpRh(C2 H4 )2 ] with Dimethyl Acetylenedicarboxylate: Identification of Intermediates of the [2+2+2] Alkyne and Alkyne-Ethylene Cyclo(co)trimerizations. Chemistry 2016; 22:13715-23. [PMID: 27535720 DOI: 10.1002/chem.201601927] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Indexed: 11/06/2022]
Abstract
The reaction between the bis(ethylene) complex [TpRh(C2 H4 )2 ], 1, (Tp=hydrotris(pyrazolyl)borate), and dimethyl acetylenedicarboxylate (DMAD) has been studied under different experimental conditions. A mixture of products was formed, in which TpRh(I) species were prevalent, whereas the presence of trapping agents, like water or acetonitrile, allowed for the stabilization and isolation of octahedral TpRh(III) compounds. An excess of DMAD gave rise to a small amount of the [2+2+2] cyclotrimerization product hexamethyl mellitate (6). Although no catalytic application of 1 was achieved, mechanistic insights shed light on the formation of stable rhodium species representing the resting state of the catalytic cycle of rhodium-mediated [2+2+2] cyclo(co)trimerization reactions. Metallacyclopentene intermediate species, generated from the activation of one alkyne and one ethylene molecule from 1, and metallacyclopentadiene species, formed by oxidative coupling of two alkynes to the rhodium centre, are crucial steps in the pathways leading to the final organometallic and organic products.
Collapse
Affiliation(s)
- Giovanni Bottari
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Laura L Santos
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Cristina M Posadas
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Kurt Mereiter
- Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, 1060, Vienna, Austria
| | - Margarita Paneque
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
| |
Collapse
|
26
|
Schäfer M, Beattie NA, Geetharani K, Schäfer J, Ewing WC, Krahfuß M, Hörl C, Dewhurst RD, Macgregor SA, Lambert C, Braunschweig H. Synthesis of Functionalized 1,4-Azaborinines by the Cyclization of Di-tert-butyliminoborane and Alkynes. J Am Chem Soc 2016; 138:8212-20. [PMID: 27286231 DOI: 10.1021/jacs.6b04128] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Di-tert-butyliminoborane is found to be a very useful synthon for the synthesis of a variety of functionalized 1,4-azaborinines by the Rh-mediated cyclization of iminoboranes with alkynes. The reactions proceed via [2 + 2] cycloaddition of iminoboranes and alkynes in the presence of [RhCl(PiPr3)2]2, which gives a rhodium η(4)-1,2-azaborete complex that yields 1,4-azaborinines upon reaction with acetylene. This reaction is compatible with substrates containing more than one alkynyl unit, cleanly affording compounds containing multiple 1,4-azaborinines. The substitution of terminal alkynes for acetylene also led to 1,4-azaborinines, enabling ring substitution at a predetermined location. We report the first general synthesis of this new methodology, which provides highly regioselective access to valuable 1,4-azaborinines in moderate yields. A mechanistic rationale for this reaction is supported by DFT calculations, which show the observed regioselectivity to arise from steric effects in the B-C bond coupling en route to the rhodium η(4)-1,2-azaborete complex and the selective oxidative cleavage of the B-N bond of the 1,2-azaborete ligand in its subsequent reaction with acetylene.
Collapse
Affiliation(s)
- Marius Schäfer
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Nicholas A Beattie
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, U.K
| | - K Geetharani
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Julian Schäfer
- Insitute für Organische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - William C Ewing
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Mirjam Krahfuß
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Christian Hörl
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Rian D Dewhurst
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, U.K
| | - Christoph Lambert
- Insitute für Organische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| |
Collapse
|
27
|
Dahy AA, Koga N. Trimerization of Acetylene Catalyzed by Ir(PH2CH2CH2PH2)Cl(cod): A Computational Study. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20150391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- AbdelRahman A. Dahy
- Department of Chemistry, Faculty of Science, Assiut University
- Graduate School of Information Science, Nagoya University
| | - Nobuaki Koga
- Graduate School of Information Science, Nagoya University
| |
Collapse
|
28
|
Crandell DW, Mazumder S, Evans PA, Baik MH. The origin of the ligand-controlled regioselectivity in Rh-catalyzed [(2 + 2) + 2] carbocyclizations: steric vs. stereoelectronic effects. Chem Sci 2015; 6:6896-6900. [PMID: 28757978 PMCID: PMC5510011 DOI: 10.1039/c5sc02307f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 08/22/2015] [Indexed: 11/21/2022] Open
Abstract
Density functional theory calculations demonstrate that the reversal of regiochemical outcome of the addition for substituted methyl propiolates in the rhodium-catalyzed [(2 + 2) + 2] carbocyclization with PPh3 and (S)-xyl-binap as ligands is both electronically and sterically controlled.
Density functional theory calculations demonstrate that the reversal of regiochemical outcome of the addition for substituted methyl propiolates in the rhodium-catalyzed [(2 + 2) + 2] carbocyclization with PPh3 and (S)-xyl-binap as ligands is both electronically and sterically controlled. For example, the ester functionality polarizes the alkyne π* orbital to favor overlap of the methyl-substituted terminus of the alkyne with the pπ-orbital of the alkenyl fragment of the rhodacycle during alkyne insertion with PPh3 as the ligand. In contrast, the sterically demanding xyl-binap ligand cannot accommodate the analogous alkyne orientation, thereby forcing insertion to occur at the sterically preferred ester terminus, overriding the electronically preferred orientation for alkyne insertion.
Collapse
Affiliation(s)
- Douglas W Crandell
- Department of Chemistry , Indiana University , 800 E. Kirkwood Ave. , Bloomington , IN 47405 , USA .
| | - Shivnath Mazumder
- Department of Chemistry , Indiana University , 800 E. Kirkwood Ave. , Bloomington , IN 47405 , USA .
| | - P Andrew Evans
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , ON K7L 3N6 , Canada .
| | - Mu-Hyun Baik
- Department of Chemistry , Indiana University , 800 E. Kirkwood Ave. , Bloomington , IN 47405 , USA . .,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon , 305-701 , South Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon , 305-701 , South Korea
| |
Collapse
|
29
|
Dahy AA, Koga N. Trimerization of Alkynes in the Presence of a Hydrotris(pyrazolyl)borate Iridium Catalyst and the Effect of Substituent Groups on the Reaction Mechanism: A Computational Study. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00566] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- AbdelRahman A. Dahy
- Department
of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
- Graduate
School of Information Science, Nagoya University, Nagoya 464-8601, Japan
| | - Nobuaki Koga
- Graduate
School of Information Science, Nagoya University, Nagoya 464-8601, Japan
| |
Collapse
|
30
|
Wolters LP, Bickelhaupt FM. The activation strain model and molecular orbital theory. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2015; 5:324-343. [PMID: 26753009 PMCID: PMC4696410 DOI: 10.1002/wcms.1221] [Citation(s) in RCA: 239] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/05/2015] [Accepted: 04/07/2015] [Indexed: 12/23/2022]
Abstract
The activation strain model is a powerful tool for understanding reactivity, or inertness, of molecular species. This is done by relating the relative energy of a molecular complex along the reaction energy profile to the structural rigidity of the reactants and the strength of their mutual interactions: ΔE(ζ) = ΔEstrain(ζ) + ΔEint(ζ). We provide a detailed discussion of the model, and elaborate on its strong connection with molecular orbital theory. Using these approaches, a causal relationship is revealed between the properties of the reactants and their reactivity, e.g., reaction barriers and plausible reaction mechanisms. This methodology may reveal intriguing parallels between completely different types of chemical transformations. Thus, the activation strain model constitutes a unifying framework that furthers the development of cross-disciplinary concepts throughout various fields of chemistry. We illustrate the activation strain model in action with selected examples from literature. These examples demonstrate how the methodology is applied to different research questions, how results are interpreted, and how insights into one chemical phenomenon can lead to an improved understanding of another, seemingly completely different chemical process. WIREs Comput Mol Sci 2015, 5:324-343. doi: 10.1002/wcms.1221.
Collapse
Affiliation(s)
- Lando P Wolters
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), VU University AmsterdamAmsterdam, The Netherlands; Dipartimento di Scienze Chimiche, Università degli Studi di PadovaPadova, Italy
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), VU University AmsterdamAmsterdam, The Netherlands; Institute of Molecules and Materials (IMM), Radboud University NijmegenNijmegen, The Netherlands
| |
Collapse
|
31
|
Kleinschmidt S, Schallenberg D, Helmdach K, Hinz A, Villinger A, Seidel WW. Spontaneous Formation of an η4-Ethylene Bis(carbene) Ligand by Alkyne Coupling at Rhenium(III). Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00030] [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)
- Steffen Kleinschmidt
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - David Schallenberg
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Kai Helmdach
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Alexander Hinz
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Wolfram W. Seidel
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| |
Collapse
|
32
|
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]
|
33
|
Dang Y, Qu S, Tao Y, Song C, Wang ZX. Mechanistic Origins of Chemo- and Regioselectivity of Ru(II)-Catalyzed Reactions Involving ortho-Alkenylarylacetylene, Alkyne, and Methanol: The Crucial Role of a Chameleon-like Intermediate. J Org Chem 2014; 79:9046-64. [DOI: 10.1021/jo501399x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yanfeng Dang
- School of Chemistry and Chemical Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Shuanglin Qu
- School of Chemistry and Chemical Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Yuan Tao
- School of Chemistry and Chemical Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Chunyu Song
- School of Chemistry and Chemical Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Xiang Wang
- School of Chemistry and Chemical Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| |
Collapse
|
34
|
Tran-Van AF, Götz S, Neuburger M, Wegner HA. A Strain Induced Change of Mechanism from a [2 + 2 + 2] to a [2 + 1 + 2 + 1] Cycloaddition Reaction. Org Lett 2014; 16:2410-3. [DOI: 10.1021/ol5007604] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anne-Florence Tran-Van
- Department
of Chemistry, Basel University, St Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Silas Götz
- Institut
für Organische Chemie, Justus-Liebig Universität, Heinrich-Buff-Ring
62, D-35392 Giessen, Deutschland
| | - Markus Neuburger
- Department
of Chemistry, Basel University, St Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Hermann A. Wegner
- Institut
für Organische Chemie, Justus-Liebig Universität, Heinrich-Buff-Ring
62, D-35392 Giessen, Deutschland
| |
Collapse
|
35
|
Haraburda E, Torres Ò, Parella T, Solà M, Pla-Quintana A. Stereoselective Rhodium-Catalysed [2+2+2] Cycloaddition of Linear Allene-Ene/Yne-Allene Substrates: Reactivity and Theoretical Mechanistic Studies. Chemistry 2014; 20:5034-45. [DOI: 10.1002/chem.201304463] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Indexed: 11/09/2022]
|
36
|
Orian L, Swart M, Bickelhaupt FM. Indenyl effect due to metal slippage? Computational exploration of rhodium-catalyzed acetylene [2+2+2] cyclotrimerization. Chemphyschem 2014; 15:219-28. [PMID: 24273097 DOI: 10.1002/cphc.201300934] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Indexed: 11/07/2022]
Abstract
The mechanism of CpRh (Cp=cyclopentadienyl) and IndRh (Ind=indenyl)-catalyzed acetylene [2+2+2] cyclotrimerization has been revisited aiming at finding an explanation for the better performance of the latter catalyst found experimentally. The hypothesis that an ancillary ligand of the precatalyst remains bonded to the metal center throughout the whole catalytic cycle, based on the experimental evidence that the nature of this ligand can exert some control in cocyclotrimerization of different alkynes, is considered. Strong hapticity variations occur in both the CpRh- and IndRh-catalyzed processes. As the Ind ligand undergoes a more facile slippage than Cp, the energy profile is far smoother in the IndRh-catalyzed cyclotrimerization. This difference in the energetics of the process translates into an enhanced activity of the IndRh catalyst, in nice agreement with experiment.
Collapse
Affiliation(s)
- Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129 Padova (Italy).
| | | | | |
Collapse
|
37
|
Guo CH, Wu HS, Hapke M, Jiao H. Theoretical studies on acetylene cyclotrimerization into benzene catalyzed by CpIr fragment. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.03.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
38
|
Orian L, Wolters LP, Bickelhaupt FM. In silico design of heteroaromatic half-sandwich RhI catalysts for acetylene [2+2+2] cyclotrimerization: evidence of a reverse indenyl effect. Chemistry 2013; 19:13337-47. [PMID: 24038672 DOI: 10.1002/chem.201301990] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Indexed: 11/09/2022]
Abstract
A mechanistic density functional theory study of acetylene [2+2+2] cyclotrimerization to benzene catalyzed by Rh(I) half metallocenes is presented. The catalyst fragment contains a heteroaromatic ligand, that is, the 1,2-azaborolyl (Ab) or the 3a,7a-azaborindenyl (Abi) anions, which are isostructural and isoelectronic to the hydrocarbon cyclopentadienyl (Cp) and indenyl (Ind) anions, respectively, but differ from the last ones on having two adjacent carbon atoms replaced with a boron and a nitrogen atom. The better performance of either the classic hydrocarbon or the heteroaromatic catalysts is found to depend on the different mechanistic paths that can be envisioned for the process. The present analyses uncover and explain general structure-reactivity relationships that may serve as rational design principles. In particular, we provide evidence of a reverse indenyl effect.
Collapse
Affiliation(s)
- Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129 Padova (Italy).
| | | | | |
Collapse
|
39
|
Liu Z, Cheng R, He X, Liu B. Reactivity and Regioselectivity of Methylacetylene Cyclotrimerization over the Phillips Cr/Silica Catalyst: A DFT Study. ACS Catal 2013. [DOI: 10.1021/cs400129g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Zhen Liu
- State Key
Laboratory of Chemical Engineering, East China University of Science
and Technology, 130 Meilong Road, 200237, Shanghai, China
| | - Ruihua Cheng
- State Key
Laboratory of Chemical Engineering, East China University of Science
and Technology, 130 Meilong Road, 200237, Shanghai, China
| | - Xuelian He
- State Key
Laboratory of Chemical Engineering, East China University of Science
and Technology, 130 Meilong Road, 200237, Shanghai, China
| | - Boping Liu
- State Key
Laboratory of Chemical Engineering, East China University of Science
and Technology, 130 Meilong Road, 200237, Shanghai, China
| |
Collapse
|
40
|
Mazumder S, Shang D, Negru DE, Baik MH, Evans PA. Stereoselective Rhodium-Catalyzed [3 + 2 + 1] Carbocyclization of Alkenylidenecyclopropanes with Carbon Monoxide: Theoretical Evidence for a Trimethylenemethane Metallacycle Intermediate. J Am Chem Soc 2012; 134:20569-72. [DOI: 10.1021/ja305467x] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shivnath Mazumder
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington,
Indiana 47405, United States
| | - Deju Shang
- Department
of Chemistry, The University of Liverpool, Liverpool L69 7ZD, United
Kingdom
| | - Daniela E. Negru
- Department
of Chemistry, The University of Liverpool, Liverpool L69 7ZD, United
Kingdom
| | - Mu-Hyun Baik
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington,
Indiana 47405, United States
- Department of Chemistry, Korea University, 208 Seochang, Chochiwon, Chung-nam
339-700, South Korea
| | - P. Andrew Evans
- Department
of Chemistry, The University of Liverpool, Liverpool L69 7ZD, United
Kingdom
| |
Collapse
|
41
|
Parera M, Dachs A, Solà M, Pla-Quintana A, Roglans A. Direct Detection of Key Intermediates in Rhodium(I)-Catalyzed [2+2+2] Cycloadditions of Alkynes by ESI-MS. Chemistry 2012; 18:13097-107. [DOI: 10.1002/chem.201200880] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 07/03/2012] [Indexed: 11/10/2022]
|
42
|
Liu Z, Cheng R, He X, Wu X, Liu B. DFT Functional Benchmarking on the Energy Splitting of Chromium Spin States and Mechanistic Study of Acetylene Cyclotrimerization over the Phillips Cr(II)/Silica Catalyst. J Phys Chem A 2012; 116:7538-49. [DOI: 10.1021/jp302529q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhen Liu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130
Meilong Road, 200237 Shanghai, China
| | - Ruihua Cheng
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130
Meilong Road, 200237 Shanghai, China
| | - Xuelian He
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130
Meilong Road, 200237 Shanghai, China
| | - Xiaojun Wu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130
Meilong Road, 200237 Shanghai, China
| | - Boping Liu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130
Meilong Road, 200237 Shanghai, China
| |
Collapse
|
43
|
Onodera G, Shimizu Y, Kimura JN, Kobayashi J, Ebihara Y, Kondo K, Sakata K, Takeuchi R. Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of α,ω-Diynes with Nitriles. J Am Chem Soc 2012; 134:10515-31. [DOI: 10.1021/ja3028394] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gen Onodera
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Yoshihisa Shimizu
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Jun-na Kimura
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Junya Kobayashi
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Yukiko Ebihara
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Kei Kondo
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Ken Sakata
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara, Shinagawa-ku, Tokyo 142-8501,
Japan
| | - Ryo Takeuchi
- Department of Chemistry and
Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| |
Collapse
|
44
|
Geetharani K, Tussupbayev S, Borowka J, Holthausen MC, Ghosh S. A Mechanistic Study of the Utilization of
arachno
‐Diruthenaborane [(Cp*RuCO)
2
B
2
H
6
] as an Active Alkyne‐Cyclotrimerization Catalyst. Chemistry 2012; 18:8482-9. [DOI: 10.1002/chem.201200291] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Indexed: 11/06/2022]
Affiliation(s)
- K. Geetharani
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036 (India), Fax: (+91) 44‐2257‐4202
| | - Samat Tussupbayev
- Johann Wolfgang Goethe Universität, Institut für Anorganische und Analytische Chemie, Max‐von‐Laue‐Strasse 7, 60438 Frankfurt (Germany), Fax: (+49) 69‐798‐29417
| | - Julia Borowka
- Johann Wolfgang Goethe Universität, Institut für Anorganische und Analytische Chemie, Max‐von‐Laue‐Strasse 7, 60438 Frankfurt (Germany), Fax: (+49) 69‐798‐29417
| | - Max C. Holthausen
- Johann Wolfgang Goethe Universität, Institut für Anorganische und Analytische Chemie, Max‐von‐Laue‐Strasse 7, 60438 Frankfurt (Germany), Fax: (+49) 69‐798‐29417
| | - Sundargopal Ghosh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036 (India), Fax: (+91) 44‐2257‐4202
| |
Collapse
|
45
|
Smoleński P. Photocatalytic properties of new cyclopentadienyl and indenyl rhodium(I) carbonyl complexes with water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) and tris(2-cyanoethyl)phosphine. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.08.046] [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]
|
46
|
Weding N, Jackstell R, Jiao H, Spannenberg A, Hapke M. Synthesis of Group 9 Metal-Olefin Complexes with Identical Ligand Frameworks and Comparison of their Catalytic Activity in [2+2+2] Cycloaddition and other Addition Reactions. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100489] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
47
|
Dachs A, Pla-Quintana A, Parella T, Solà M, Roglans A. Intramolecular [2+2+2] Cycloaddition Reactions of Yne-ene-yne and Yne-yne-ene Enediynes Catalysed by RhI: Experimental and Theoretical Mechanistic Studies. Chemistry 2011; 17:14493-507. [DOI: 10.1002/chem.201102210] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Indexed: 11/06/2022]
|
48
|
Calhorda MJ, Costa PJ, Kirchner KA. Benzene and heterocyclic rings formation in cycloaddition reactions catalyzed by RuCp derivatives: DFT studies. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.03.062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
49
|
Yao ZK, Yu ZX. Mechanisms of the Thermal Cyclotrimerizations of Fluoro- and Chloroacetylenes: Density Functional Theory Investigation and Intermediate Trapping Experiments. J Am Chem Soc 2011; 133:10864-77. [DOI: 10.1021/ja2021476] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhong-Ke Yao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| |
Collapse
|
50
|
Dachs A, Roglans A, Solà M. RhCl(PPh3)3-Catalyzed Intramolecular Cycloaddition of Enediynes: The Nature of the Tether and Substituents Controls the Reaction Mechanism. Organometallics 2011. [DOI: 10.1021/om200227e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|