1
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Raßpe-Lange L, Hoffmann A, Gertig C, Heck J, Leonhard K, Herres-Pawlis S. Geometrical benchmarking and analysis of redox potentials of copper(I/II) guanidine-quinoline complexes: Comparison of semi-empirical tight-binding and DFT methods and the challenge of describing the entatic state (part III). J Comput Chem 2023; 44:319-328. [PMID: 35640228 DOI: 10.1002/jcc.26927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/14/2022] [Accepted: 04/20/2022] [Indexed: 01/03/2023]
Abstract
Copper guanidine-quinoline complexes are an important class of bioinorganic complexes that find utilization in electron and atom transfer processes. By substitution of functional groups on the quinoline moiety the electron transfer abilities of these complexes can be tuned. In order to explore the full substitution space by simulations, the accurate theoretical description of the effect of functional groups is essential. In this study, we compare three different methods for the theoretical description of the structures. We use the semi-empirical tight-binding method GFN2-xTB, the density functional TPSSh and the double-hybrid functional B2PLYP. We evaluate the methods on five different complex pairs (Cu(I) and Cu(II) complexes), and compare how well calculated energies can predict the redox potentials. We find even though B2PLYP and TPSSh yield better accordance with the experimental structures. GFN2-xTB performs surprisingly well in the geometry optimization at a fraction of the computational cost. TPSSh offers a good compromise between computational cost and accuracy of the redox potential for real-life complexes.
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Affiliation(s)
- Lukas Raßpe-Lange
- Institute of Technical Thermodynamics, RWTH Aachen University, Aachen, Germany
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Christoph Gertig
- Institute of Technical Thermodynamics, RWTH Aachen University, Aachen, Germany.,Pharmaplan AG, Basel, Switzerland
| | - Joshua Heck
- Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Kai Leonhard
- Institute of Technical Thermodynamics, RWTH Aachen University, Aachen, Germany
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2
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Kröckert KW, Garg F, Heinz MV, Lange J, Simões PP, Schmidt R, Bienemann O, Hoffmann A, Herres-Pawlis S. Understanding the structure-activity relationship and performance of highly active novel ATRP catalysts. Dalton Trans 2022; 51:13272-13287. [PMID: 35983714 DOI: 10.1039/d2dt01954j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper bromide complexes based on a series of substituted guanidine-quinolinyl and -pyridinyl ligands are reported. The ligand systems were chosen based on the large variation with regard to their flexibility in the backbone, different guanidine moieties and influence by electron density donating groups. Relationships between the molecular structures and spectroscopic and electronic properties are described. Beside the expected increase in activity by substituting the 4-position (NMe2vs. H), we showed that a higher flexibility, such as TMG vs. DMEG moiety, leads to a better stabilsiation of the copper(II) complex. Due to the correlation of the potentials and KATRP values, the catalyst based on the ligand TMGm4NMe2py is the most active copper complex for ATRP with a bidentate ligand system. The combination of the strong donating abilities of dimethylamine pyridinyl, the donor properties of the TMG substituent, and the improved flexibility due to the methylene bridging unit leads to high activity. With all NMe2-substituted systems standard ATRP experiments were conducted and with more active NMe2-substituted pyridinyl systems, ICAR ATRP experiments of styrene were conducted. Low dispersities and ideal molar masses have been achieved.
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Affiliation(s)
- Konstantin W Kröckert
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Felix Garg
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Michel V Heinz
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Justin Lange
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Patricia P Simões
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Regina Schmidt
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Olga Bienemann
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Str. 6, 44227 Dortmund, Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
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3
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Said M, Rehman S, Ikram M, Khan H, Schulzke C. Synthesis and crystal structure analyses of tri-substituted guanidine-based copper(II) complexes. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2020-0155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three guanidine-derived tri-substituted ligands viz. N-pivaloyl-N′,N″-bis-(2-methoxyphenyl)guanidine (L1), N-pivaloyl-N′-(2-methoxyphenyl)-N″-phenylguanidine (L2) and N-pivaloyl-N′-(2-methoxyphenyl)-N″-(2-tolyl)guanidine (L3) were reacted with Cu(II) acetate to produce the corresponding complexes. The significance of the substituent on N″ for the resulting molecular structures and their packing in the solid state has been studied with respect to the structural specifics of the corresponding Cu(II) complexes. The key characteristic of the guanidine-based metal complexation with Cu(II) is the formation of an essentially square planar core with an N2O2 donor set. As an exception, in the complex of L1, the substituent’s methoxy moiety also interacts with the Cu(II) center to generate a square-pyramidal geometry. The hydroxyl groups of the imidic acid tautomeric forms of L1–L3, in addition to N″, are also bonded to Cu(II) in all three complexes rather than the nitrogen donor of the guanidine motif.
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Affiliation(s)
- Muhammad Said
- Department of Chemistry , University of Malakand , Chakdara , 23050 , Pakistan
| | - Sadia Rehman
- Department of Chemistry , Abdul Wali Khan University , Mardan , 23200 , Pakistan
| | - Muhammad Ikram
- Department of Chemistry , Abdul Wali Khan University , Mardan , 23200 , Pakistan
| | - Hizbullah Khan
- Department of Chemistry , University of Science and Technology , Bannu , 28100 , Pakistan
| | - Carola Schulzke
- Institut für Biochemie , Universität Greifswald , Felix-Hausdorff-Straße 4 , 17489 Greifswald , Germany
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4
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An effective non-chromatographic method for the purification of phenanthrolines and related ligands. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Ortmeyer J, Vukadinovic Y, Neuba A, Flörke U, Henkel G. Combining a Phenanthroline Moiety with Peralkylated Guanidine Residues: Homometallic Cu
II
, Ni
II
and Zn
II
Halide Complexes with Site‐Differentiating Janus Head Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jochen Ortmeyer
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Yannik Vukadinovic
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Adam Neuba
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Ulrich Flörke
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Gerald Henkel
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
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6
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Stanek J, Konrad M, Mannsperger J, Hoffmann A, Herres-Pawlis S. Influence of Functionalized Substituents on the Electron-Transfer Abilities of Copper Guanidinoquinoline Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Julia Stanek
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Marc Konrad
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Johannes Mannsperger
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander Hoffmann
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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7
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Rösener T, Kröckert K, Hoffmann A, Herres-Pawlis S. The Curious Case of a Phenylated Guanidinoquinoline Ligand: Synthesis, Complexes and ATRP Properties of DMEG6phqu. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Rösener
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Konstantin Kröckert
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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8
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Lukin A, Kalinchenkova N, Vedekhina T, Zhurilo N, Krasavin M. Diversity-oriented synthesis of N,N -dimethylamino-substituted azoles employing TBTU. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.05.075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Rösener T, Hoffmann A, Herres-Pawlis S. Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800511] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Rösener
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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10
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Ortmeyer J, Vukadinovic Y, Neuba A, Egold H, Flörke U, Henkel G. Combining a Phenanthroline Moiety with Two Peralkylated Guanidine Residues: Janus Head Pro-Ligands. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jochen Ortmeyer
- Fakultät für Naturwissenschaften, Department Chemie; Universität Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Yannik Vukadinovic
- Fakultät für Naturwissenschaften, Department Chemie; Universität Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Adam Neuba
- Fakultät für Naturwissenschaften, Department Chemie; Universität Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Hans Egold
- Fakultät für Naturwissenschaften, Department Chemie; Universität Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Ulrich Flörke
- Fakultät für Naturwissenschaften, Department Chemie; Universität Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Gerald Henkel
- Fakultät für Naturwissenschaften, Department Chemie; Universität Paderborn; Warburger Strasse 100 33098 Paderborn Germany
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11
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Stanek J, Sackers N, Fink F, Paul M, Peters L, Grunzke R, Hoffmann A, Herres-Pawlis S. Copper Guanidinoquinoline Complexes as Entatic State Models of Electron-Transfer Proteins. Chemistry 2017; 23:15738-15745. [DOI: 10.1002/chem.201703261] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Julia Stanek
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Nina Sackers
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Fabian Fink
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Melanie Paul
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Laurens Peters
- Department Chemie; Ludwig-Maximilians Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Richard Grunzke
- Zentrum für Informationsdienste und Hochleistungsrechnen; Technische Universität Dresden; Zellescher Weg 12-14 01062 Dresden Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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12
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Wangngae S, Pattarawarapan M, Phakhodee W. Ph3P/I2-Mediated Synthesis of N,N′,N″-Substituted Guanidines and 2-Iminoimidazolin-4-ones from Aryl Isothiocyanates. J Org Chem 2017; 82:10331-10340. [DOI: 10.1021/acs.joc.7b01794] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sirilak Wangngae
- Department
of Chemistry, Faculty of Science, ‡Graduate School, §Center of Excellence in Materials
Science and Technology, and ∥Center of Excellence for Innovation in Chemistry,
Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Mookda Pattarawarapan
- Department
of Chemistry, Faculty of Science, ‡Graduate School, §Center of Excellence in Materials
Science and Technology, and ∥Center of Excellence for Innovation in Chemistry,
Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Wong Phakhodee
- Department
of Chemistry, Faculty of Science, ‡Graduate School, §Center of Excellence in Materials
Science and Technology, and ∥Center of Excellence for Innovation in Chemistry,
Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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13
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Multi-level meta-workflows: new concept for regularly occurring tasks in quantum chemistry. J Cheminform 2016; 8:58. [PMID: 27818709 PMCID: PMC5073744 DOI: 10.1186/s13321-016-0169-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 10/04/2016] [Indexed: 11/10/2022] Open
Abstract
Background
In Quantum Chemistry, many tasks are reoccurring frequently, e.g. geometry optimizations, benchmarking series etc. Here, workflows can help to reduce the time of manual job definition and output extraction. These workflows are executed on computing infrastructures and may require large computing and data resources. Scientific workflows hide these infrastructures and the resources needed to run them. It requires significant efforts and specific expertise to design, implement and test these workflows. Significance Many of these workflows are complex and monolithic entities that can be used for particular scientific experiments. Hence, their modification is not straightforward and it makes almost impossible to share them. To address these issues we propose developing atomic workflows and embedding them in meta-workflows. Atomic workflows deliver a well-defined research domain specific function. Publishing workflows in repositories enables workflow sharing inside and/or among scientific communities. We formally specify atomic and meta-workflows in order to define data structures to be used in repositories for uploading and sharing them. Additionally, we present a formal description focused at orchestration of atomic workflows into meta-workflows. Conclusions We investigated the operations that represent basic functionalities in Quantum Chemistry, developed the relevant atomic workflows and combined them into meta-workflows. Having these workflows we defined the structure of the Quantum Chemistry workflow library and uploaded these workflows in the SHIWA Workflow Repository.Meta-workflows and embedded workflows in the template representation ![]() Electronic supplementary material The online version of this article (doi:10.1186/s13321-016-0169-8) contains supplementary material, which is available to authorized users.
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14
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Metz A, Plothe R, Glowacki B, Koszalkowski A, Scheckenbach M, Beringer A, Rösener T, Michaelis de Vasconcellos J, Haase R, Flörke U, Hoffmann A, Herres-Pawlis S. Zinc Chloride Complexes with Aliphatic and Aromatic Guanidine Hybrid Ligands and Their Activity in the Ring-Opening Polymerisation ofd,l-Lactide. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600870] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Angela Metz
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Ramona Plothe
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Str. 6 44227 Dortmund Germany
| | - Britta Glowacki
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Str. 6 44227 Dortmund Germany
| | - Andreas Koszalkowski
- Ludwig-Maximilians-Universität München; Department of Chemistry; Butenandtstr. 5-13 81377 München Germany
| | - Michael Scheckenbach
- Ludwig-Maximilians-Universität München; Department of Chemistry; Butenandtstr. 5-13 81377 München Germany
| | - Andreas Beringer
- Ludwig-Maximilians-Universität München; Department of Chemistry; Butenandtstr. 5-13 81377 München Germany
| | - Thomas Rösener
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | | | - Roxana Haase
- Universität Paderborn, Anorganische Chemie; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Ulrich Flörke
- Universität Paderborn, Anorganische Chemie; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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15
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Hoffmann A, Stanek J, Dicke B, Peters L, Grimm-Lebsanft B, Wetzel A, Jesser A, Bauer M, Gnida M, Meyer-Klaucke W, Rübhausen M, Herres-Pawlis S. Implications of Guanidine Substitution on Copper Complexes as Entatic-State Models. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600655] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Julia Stanek
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Benjamin Dicke
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Laurens Peters
- Department Chemie; Ludwig-Maximilians Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Benjamin Grimm-Lebsanft
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Alina Wetzel
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Anton Jesser
- Department Chemie; Ludwig-Maximilians Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Matthias Bauer
- Universität Paderborn; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Manuel Gnida
- Universität Paderborn; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Wolfram Meyer-Klaucke
- Universität Paderborn; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Michael Rübhausen
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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16
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Rösener T, Bienemann O, Sigl K, Schopp N, Schnitter F, Flörke U, Hoffmann A, Döring A, Kuckling D, Herres-Pawlis S. A Comprehensive Study of Copper Guanidine Quinoline Complexes: Predicting the Activity of Catalysts in ATRP with DFT. Chemistry 2016; 22:13550-62. [PMID: 27505859 DOI: 10.1002/chem.201602223] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Indexed: 11/07/2022]
Abstract
Copper complexes of the hybrid guanidine ligands 1,3-dimethyl-N-(quinolin-8-yl)-imidazolidin-2-imine (DMEGqu) and 1,1,3,3-tetramethyl-2-(quinolin-8-yl)-guanidine (TMGqu) have been studied comprehensively with regard to their structural and electrochemical properties and their activity in atom transfer radical polymerization (ATRP). A simple analysis of the molecular structures of the complexes gives no indication about their activity in ATRP; however, with the help of DFT and NBO analysis the influence of particular coordinating donors on the electrochemical properties could be fully elucidated. With an adequate DFT methodology and newly applied theoretical isodesmic reactions it was possible to predict the relative position of the redox potentials of copper complexes containing DMEGqu and TMGqu ligands. In addition, predictions could be made as to whether the complexes of DMEGqu or TMGqu are more active in ATRP. Four new Cu(I) complexes were tested in standard ATRP reactions and kinetically investigated both in bulk and in solution. It could be proven that complexes featuring DMEGqu possess a lower redox potential and are more active in ATRP, although the tetramethylguanidine moiety represents the stronger donor.
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Affiliation(s)
- Thomas Rösener
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Olga Bienemann
- Technische Universität Dortmund, Fakultät CCB, Otto-Hahn-Str. 6, 44277, Dortmund, Germany
| | - Kerstin Sigl
- Department für Chemie und Pharmazie, Ludwig-Maximilians Universität München, Butenandtstraße 5-13, 81377, München, Germany
| | - Nora Schopp
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Fabian Schnitter
- Department für Chemie und Pharmazie, Ludwig-Maximilians Universität München, Butenandtstraße 5-13, 81377, München, Germany
| | - Ulrich Flörke
- Department Chemie, Universität Paderborn, Warburger Str.100, 33098, Paderborn, Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Artjom Döring
- Department Chemie, Universität Paderborn, Warburger Str.100, 33098, Paderborn, Germany
| | - Dirk Kuckling
- Department Chemie, Universität Paderborn, Warburger Str.100, 33098, Paderborn, Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.
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17
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Sehimi H, Chérif I, Zid MF. Crystal structure and spectroscopic analysis of a new oxalate-bridged Mn(II) compound: catena-poly[guanidinium [[aqua-chlorido-manganese(II)]-μ2-oxalato-κ(4) O (1),O (2):O (1'),O (2')] monohydrate]. Acta Crystallogr E Crystallogr Commun 2016; 72:724-9. [PMID: 27308028 PMCID: PMC4908543 DOI: 10.1107/s2056989016006605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 04/18/2016] [Indexed: 11/11/2022]
Abstract
As part of our studies on the synthesis and the characterization of oxalate-bridged compounds M-ox-M (ox = oxalate dianion and M = transition metal ion), we report the crystal structure of a new oxalate-bridged Mn(II) phase, {(CH6N3)[Mn(C2O4)Cl(H2O)]·H2O} n . In the compound, a succession of Mn(II) ions (situated on inversion centers) adopting a distorted octa-hedral coordination and bridged by oxalate ligands forms parallel zigzag chains running along the c axis. These chains are inter-connected through O-H⋯O hydrogen-bonding inter-actions to form anionic layers parallel to (010). Individual layers are held together via strong hydrogen bonds involving the guanidinium cations (N-H⋯O and N-H⋯Cl) and the disordered non-coordinating water mol-ecule (O-H⋯O and O-H⋯Cl), as well as by guanidinium π-π stacking. The structural data were confirmed by IR and UV-Visible spectroscopic analysis.
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Affiliation(s)
- Hiba Sehimi
- Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 Manar II Tunis, Tunisia
- Université de Gabès, Faculté des Sciences de Gabès, Campus Universitaire, Cité Erriadh Zrig, Gabès, 6072, Tunisia
| | - Ichraf Chérif
- Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 Manar II Tunis, Tunisia
- Université de Gabès, Faculté des Sciences de Gabès, Campus Universitaire, Cité Erriadh Zrig, Gabès, 6072, Tunisia
| | - Mohamed Faouzi Zid
- Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 Manar II Tunis, Tunisia
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Castillo M, Barreda O, Maity AK, Barraza B, Lu J, Metta-Magaña AJ, Fortier S. Advances in Guanidine Ligand Design: Synthesis of a Strongly Electron-Donating, Imidazolin-2-iminato Functionalized Guanidinate and its Properties on Iron. J COORD CHEM 2016; 69:2003-2014. [PMID: 28216799 PMCID: PMC5312970 DOI: 10.1080/00958972.2016.1167198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 02/18/2016] [Indexed: 10/22/2022]
Abstract
Imidazolin-2-imines (ImRN-), derived from N-heterocylic carbenes, have been shown to be strong electron donors when directly coordinated to metals or when used as a substituent in larger ligand frameworks. In an attempt to enhance the electron-donating properties of the popular guanidine ligand class, the effect of appending an ImRN- backbone onto a guanidinate scaffold was investigated. Addition of 1 equiv of [Li(Et2O)][Im tBuN] to the aryl carbodiimide (dippN)2C (dipp = 2,6-diisopropylphenyl) cleanly affords the lithium Im tBuN-functionalized guanidinate [Li(THF)2][(Im tBuN)C(Ndipp)2] (1). Subsequent metalation of the ligand with FeBr2 gives the yellow Fe(II) complex {[(Im tBuN)C(Ndipp)2]FeBr}2 (4) in good yield. Solid-state structural analyses of both 1 and 4 shows the Im tBuN- group acts as a non-coordinating backbone substituent. Direct structural comparison of 4 to the closely related guanidinate and ketimine-guanidinate complexes {[(X)C(Ndipp)2]FeBr}2 (X = t Bu2C=N (5); N( i Pr)2 (6)), differing only in their backbone, reveals a detectable resonance contribution of the Im tBuN- group to the guanidinate ligand electronic structure. Moreover, the Fe(II)/Fe(III) redox couple of 4 (E1/2 = -0.67 V) is cathodically shifted by greater than 200 mV from the oxidation potentials of 5 (E1/2 = -0.42 V) and 6 (E1/2 = -0.45 V), demonstrating the [(Im tBuN)C(Ndipp)2]- system to be a quantifiably superior electron donor.
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Affiliation(s)
| | - Omar Barreda
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Arnab K. Maity
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Brian Barraza
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Jeffrey Lu
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106
| | | | - Skye Fortier
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
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Smolko L, Černák J, Dušek M, Titiš J, Boča R. Tetracoordinate Co(ii) complexes containing bathocuproine and single molecule magnetism. NEW J CHEM 2016. [DOI: 10.1039/c6nj00372a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chlorido complex [Co(bcp)Cl2] exhibits a field-induced SMM behaviour, while in the bromide and iodido analogues only weak antiferromagnetic interactions are present.
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Affiliation(s)
- Lukáš Smolko
- Department of Inorganic Chemistry
- Institute of Chemistry
- Faculty of Sciences
- P. J Šafárik University in Košice
- 04154 Košice
| | - Juraj Černák
- Department of Inorganic Chemistry
- Institute of Chemistry
- Faculty of Sciences
- P. J Šafárik University in Košice
- 04154 Košice
| | - Michal Dušek
- Institute of Physics
- Czech Academy of Sciences
- 18221 Prague 8
- Czech Republic
| | - Ján Titiš
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- 91701 Trnava
- Slovakia
| | - Roman Boča
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- 91701 Trnava
- Slovakia
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20
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Krämer C, Leingang S, Hübner O, Kaifer E, Wadepohl H, Himmel HJ. Construction of copper chains with new fluorescent guanidino-functionalized naphthyridine ligands. Dalton Trans 2016; 45:16966-16983. [DOI: 10.1039/c6dt03166h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A high charge and a low coordination number are the characteristics of fluorescent Cu4 chain complexes with 2,7-bisguanidino-naphthyridine ligands.
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Affiliation(s)
- Christoph Krämer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Simone Leingang
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Olaf Hübner
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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Döring A, Flörke U, Hoffmann A, Jones MD, Kuckling D, Michaelis de Vasconcellos J, Herres-Pawlis S. Zinc Complexes with Guanidine-Pyridine Hybrid Ligands: Anion Effect and Catalytic Activity. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Nitrogen ligands effects in the palladium-catalyzed carbonylation reaction of nitrobenzene to give N-methyl phenylcarbamate. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.04.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Hoffmann A, Grunzke R, Herres-Pawlis S. Insights into the influence of dispersion correction in the theoretical treatment of guanidine-quinoline copper(I) complexes. J Comput Chem 2014; 35:1943-50. [DOI: 10.1002/jcc.23706] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 07/14/2014] [Accepted: 07/16/2014] [Indexed: 01/22/2023]
Affiliation(s)
- Alexander Hoffmann
- Department of Chemistry; Ludwig-Maximilians-Universität München, Butenandtstr. 5 - 13; 81377 München Germany
| | - Richard Grunzke
- Zentrum für Informationsdienste und Hochleistungsrechnen; Technische Universität Dresden; Zellescher Weg 12-14 01062 Dresden Germany
| | - Sonja Herres-Pawlis
- Department of Chemistry; Ludwig-Maximilians-Universität München, Butenandtstr. 5 - 13; 81377 München Germany
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Ouizem S, Pailloux SL, Ray AD, Duesler EN, Dickie DA, Paine RT, Hay BP. Synthesis and Selected Reactivity Studies of a Dissymmetric (PhosphinoylmethylpyridineN-Oxide) Methylamine Platform. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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26
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Wu X, Tamm M. Transition metal complexes supported by highly basic imidazolin-2-iminato and imidazolin-2-imine N-donor ligands. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.10.007] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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Herrmann H, Ziesak A, Wild U, Leingang S, Schrempp D, Wagner N, Beck J, Kaifer E, Wadepohl H, Himmel HJ. Tetracyanoquinodimethane Reduction by Complexed Guanidinyl-Functionalized Aromatic Compounds. Chemphyschem 2014; 15:351-65. [DOI: 10.1002/cphc.201300862] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Indexed: 01/17/2023]
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28
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Hoffmann A, Binder S, Jesser A, Haase R, Flörke U, Gnida M, Salomone Stagni M, Meyer-Klaucke W, Lebsanft B, Grünig LE, Schneider S, Hashemi M, Goos A, Wetzel A, Rübhausen M, Herres-Pawlis S. Den entatischen Zustand im Griff - ein Duo von Kupfer-Komplexen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306061] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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29
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Hoffmann A, Binder S, Jesser A, Haase R, Flörke U, Gnida M, Salomone Stagni M, Meyer-Klaucke W, Lebsanft B, Grünig LE, Schneider S, Hashemi M, Goos A, Wetzel A, Rübhausen M, Herres-Pawlis S. Catching an Entatic State-A Pair of Copper Complexes. Angew Chem Int Ed Engl 2013; 53:299-304. [DOI: 10.1002/anie.201306061] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 08/25/2013] [Indexed: 11/08/2022]
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30
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Bienemann O, Froin AK, dos Santos Vieira I, Wortmann R, Hoffmann A, Herres-Pawlis S. Structural Aspects of Copper-Mediated Atom Transfer Radical Polymerization with a Novel Tetradentate Bisguanidine Ligand. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200092] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Dehghanpour S, Afshariazar F, Assoud J. Reduction of 2,2′-dinitrobiphenyl with hydrazine hydrate catalyzed by Pd/C: Cobalt(II), zinc(II) and mercury(II) complexes with benzo[c]cinnoline and N2,N2′-bis(3-phenylallylidene)biphenyl-2,2′-diamine. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.12.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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dos Santos Vieira I, Herres‐Pawlis S. Lactide Polymerisation with Complexes of Neutral N‐Donors – New Strategies for Robust Catalysts. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101131] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ines dos Santos Vieira
- Fakultät Chemie, Anorganische Chemie, Technische Universität Dortmund, 44221 Dortmund, German, Fax: +49‐231‐7555048
| | - Sonja Herres‐Pawlis
- Fakultät Chemie, Anorganische Chemie, Technische Universität Dortmund, 44221 Dortmund, German, Fax: +49‐231‐7555048
- Present address: Fakultät für Chemie und Pharmazie, Department Chemie, Ludwig‐Maximilians‐Universität München, Butenandtstr. 5–13, 81377 München, Germany, Fax: +49‐89‐218077867
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Kelly B, O'Donovan DH, O'Brien J, McCabe T, Blanco F, Rozas I. Pyridin-2-yl guanidine derivatives: conformational control induced by intramolecular hydrogen-bonding interactions. J Org Chem 2011; 76:9216-27. [PMID: 21977964 DOI: 10.1021/jo200954c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis and conformational analysis of a series of pyridin-2-yl guanidine derivatives using NMR, X-ray crystallography, and B3LYP/6-31+G** theoretical studies are reported. A remarkable difference was observed in the (1)H NMR spectra of the guanidinium salts as compared with their N,N'-di-Boc protected and neutral analogues. This difference corresponds to a 180° change in the dihedral angle between the guanidine/ium moiety and the pyridine ring in the salts as compared to the Boc-protected derivatives, a conclusion that was supported by theoretical studies, X-ray data, and NMR analysis. Moreover, our data sustain the existence of two intramolecular hydrogen-bonding systems: (i) between the pyridine N1 atom and the guanidinium protons in the salts and (ii) within the tert-butyl carbamate groups of the Boc-protected derivatives. To verify that the observed conformational control arises from these intramolecular interactions, a new series of N-Boc-N'-propyl-substituted pyridin-2-yl guanidines were also prepared and studied.
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Affiliation(s)
- Brendan Kelly
- School of Chemistry, University of Dublin, Trinity College, Dublin 2, Ireland
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34
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Börner J, dos Santos Vieira I, Jones MD, Döring A, Kuckling D, Flörke U, Herres-Pawlis S. Zinc Complexes with Guanidine-Pyridine Hybrid Ligands - Guanidine Effect and Catalytic Activity. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100540] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Borodkin GS, Borodkina IG, Garnovskii AD. Heteronuclear NMR spectroscopy in the coordination chemistry. RUSS J COORD CHEM+ 2011. [DOI: 10.1134/s1070328411070025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Bienemann O, Haase R, Jesser A, Beschnitt T, Döring A, Kuckling D, dos Santos Vieira I, Flörke U, Herres-Pawlis S. Synthesis and Application of New Guanidine Copper Complexes in Atom Transfer Radical Polymerisation. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001197] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Börner J, dos Santos Vieira I, Pawlis A, Döring A, Kuckling D, Herres‐Pawlis S. Mechanism of the Living Lactide Polymerization Mediated by Robust Zinc Guanidine Complexes. Chemistry 2011; 17:4507-12. [DOI: 10.1002/chem.201002690] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Janna Börner
- Department Chemie, Anorganische Chemie, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn (Germany)
| | - Ines dos Santos Vieira
- Fakultät Chemie, Anorganische Chemie II, Technische Universität Dortmund, 44221 Dortmund (Germany), Fax: (+49) 231‐7555048
| | - Alexander Pawlis
- Department Physik, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn (Germany)
| | - Artjom Döring
- Department Chemie, Organische Chemie, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn (Germany)
| | - Dirk Kuckling
- Department Chemie, Organische Chemie, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn (Germany)
| | - Sonja Herres‐Pawlis
- Fakultät Chemie, Anorganische Chemie II, Technische Universität Dortmund, 44221 Dortmund (Germany), Fax: (+49) 231‐7555048
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38
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Wortmann R, Flörke U, Sarkar B, Umamaheshwari V, Gescheidt G, Herres‐Pawlis S, Henkel G. Synthesis and Characterisation of Novel (Guanidine)manganese Complexes and Their Application in the Epoxidation of 1‐Octene. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000836] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ramona Wortmann
- Department Chemie, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany, Fax: +49‐5251‐603423
| | - Ulrich Flörke
- Department Chemie, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany, Fax: +49‐5251‐603423
| | - Biprajit Sarkar
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Venkatesan Umamaheshwari
- Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Georg Gescheidt
- Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Sonja Herres‐Pawlis
- Fakultät Chemie, Anorganische Chemie, Technische Universität Dortmund, 44221 Dortmund, Germany, Fax: +49‐231‐7555048
| | - Gerald Henkel
- Department Chemie, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany, Fax: +49‐5251‐603423
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Börner J, Flörke U, Döring A, Kuckling D, Herres-Pawlis S. Tracking the Structure-Reactivity Relationship of Zinc Guanidine-Pyridine Hybrid Complexes Initiating Lactide Polymerisation. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201051049] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Thakurta S, Butcher RJ, Gómez-García CJ, Garribba E, Mitra S. Synthesis, structural aspects and magnetic properties of an unusual 2D thiocyanato-bridged cobalt(II)–Schiff base network. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.07.069] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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41
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Glöge T, Petrovic D, Hrib C, Daniliuc C, Herdtweck E, Jones P, Tamm M. Synthesis and Structural Characterisation of an Isomorphous Series of Bis(imidazolin-2-imine) Metal Dichlorides Containing the First Row Transition Metals Mn, Fe, Co, Ni, Cu and Zn. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.201000238] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Filimon SA, Hrib C, Randoll S, Neda I, Jones P, Tamm M. Quinine-Derived Imidazolidin-2-imine Ligands: Synthesis, Coordination Chemistry, and Application in Catalytic Transfer Hydrogenation. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.200900485] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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43
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16-Electron (Arene)ruthenium Complexes with Superbasic Bis(imidazolin-2-imine) Ligands and Their Use in Catalytic Transfer Hydrogenation. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900570] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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