1
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Sajjad MA, Schwerdtfeger P, Cai Y, Waters JM, Harrison JA, Nielson AJ. Bis‐anagostic structures in N,N’‐chelate ligand complexes of palladium(II). Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Peter Schwerdtfeger
- Massey University - Albany Campus: Massey University - Auckland Campus Chemistry NEW ZEALAND
| | - Yicao Cai
- Massey University - Albany Campus: Massey University - Auckland Campus Chemistry NEW ZEALAND
| | - Joyce M. Waters
- Massey University - Albany Campus: Massey University - Auckland Campus Chemistry NEW ZEALAND
| | - John A. Harrison
- Massey University - Albany Campus: Massey University - Auckland Campus Chemistry NEW ZEALAND
| | - Alastair James Nielson
- Massey University at Albany Chemistry. INS Albany CampusPrivate bag 102 904 NSMC Private Bag 102 904 Auckland NEW ZEALAND
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2
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Sakai S, Kanemoto K, Fukuzawa SI. Synthesis and Evaluation of Novel Planar‐Chiral Monophosphine Ligands Bearing Ferrocene‐Triazole Backbones. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100967] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Suguru Sakai
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry JAPAN
| | - Kazuya Kanemoto
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry Kasuga1-13-27 112-8551 Bunkyo-ku JAPAN
| | - Shin-ichi Fukuzawa
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry JAPAN
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3
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Sajjad MA, Schwerdtfeger P, Harrison JA, Nielson AJ. Steric and Electronic Manipulation of the Agostic and π‐Syndetic Donations in a Known Iminophosphane Ni(II) Complex Containing a Rotatable In‐Plane Aromatic Ring. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- M. Arif Sajjad
- Department of Chemistry Division of Science and Technology University of Education Lahore 54000 Pakistan
| | - Peter Schwerdtfeger
- Centre for Theoretical Chemistry and Physics Institute of Advanced Studies Massey University Auckland Private bag 102904 North Shore Mail centre Auckland New Zealand
| | - John A. Harrison
- School of Natural and Computational Sciences Massey University Auckland Private bag 102904 North Shore Mail centre Auckland New Zealand
| | - Alastair J. Nielson
- School of Natural and Computational Sciences Massey University Auckland Private bag 102904 North Shore Mail centre Auckland New Zealand
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4
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Lin X, Wu W, Mo Y. A theoretical perspective of the agostic effect in early transition metal compounds. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213401] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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5
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Electronic and Steric Manipulation of the Agostic Interaction in benzo[
h
]quinoline Complexes of Pd(II) and Implications for the Formation of η
1
‐Pd–C Bonds. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Sajjad MA, Schwerdtfeger P, Harrison JA, Nielson AJ. A Search by NBO Analysis for Syndetic Donation in Known X‐ray Structures of Transition Metal Complexes with Close Aromatic Ring C–H···Metal Approaches. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- M. Arif Sajjad
- Centre for Theoretical Chemistry and Physics Institute of Advanced Studies Massey University Auckland North Shore Mail Centre 102904 Auckland New Zealand
| | - Peter Schwerdtfeger
- Centre for Theoretical Chemistry and Physics Institute of Advanced Studies Massey University Auckland North Shore Mail Centre 102904 Auckland New Zealand
| | - John A. Harrison
- School of Natural and Computational Sciences Massey University Auckland North Shore Mail Centre Private bag 102904 Auckland New Zealand
| | - Alastair J. Nielson
- School of Natural and Computational Sciences Massey University Auckland North Shore Mail Centre Private bag 102904 Auckland New Zealand
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7
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Alharis RA, McMullin CL, Davies DL, Singh K, Macgregor SA. Understanding electronic effects on carboxylate-assisted C-H activation at ruthenium: the importance of kinetic and thermodynamic control. Faraday Discuss 2019; 220:386-403. [PMID: 31528900 DOI: 10.1039/c9fd00063a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Meta- and para-substituted 1-phenylpyrazoles (R-phpyz-H) react with [RuCl2(p-cymene)]2 in the presence of NaOAc to form cyclometallated complexes [M(R-phpyz)Cl(p-cymene)] (where R = NMe2, OMe, Me, H, F, CF3 and NO2). Experimental and DFT studies indicate that product formation can be reversible or irreversible depending on the substituents and the reaction conditions. Competition experiments show that the kinetic selectivity favours electron-donating substituents and correlate well with the Hammett parameter, giving a negative slope (ρ = -2.4) that is consistent with a cationic transition state. However, surprisingly, the thermodynamic selectivity is completely opposite, with substrates featuring electron-withdrawing groups being favoured. These trends are reproduced with DFT calculations that locate a rate-limiting transition state dominated by Ru-O bond dissociation and minimal C-H bond elongation. Detailed computational analysis of these transition states shows that C-H activation proceeds by an AMLA/CMD mechanism through a synergic combination of a C-H→Ru agostic interaction and C-HO H-bonding. NBO calculations also highlight a syndetic bonding term, and the relative weights of these three components vary in a complementary fashion depending on the nature of the substituent. With meta-substituted ligands H/D exchange experiments signal kinetically accessible ortho-C-H activation when R = NMe2, OMe and Me. This is also modelled computationally and the calculations highlight the kinetic relevance of the HOAc/Cl exchange that occurs post C-H bond cleavage, in particular with the bulkier NMe2 and Me substituents. Our study highlights that the experimental substituent effects are dependent on the reaction conditions and so using such studies to assign the mechanism of C-H activation in either stoichiometric or catalytic reactions may be misleading.
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Affiliation(s)
- Raed A Alharis
- Department of Chemistry, University of Leicester, Leicester, LE1 7RH, UK.
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8
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C–H ⋯Pd interactions in palladium complexes derived from tetrasulfur-difluorinated ligands. Experimental, computational and catalytic studies. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Alharis RA, McMullin CL, Davies DL, Singh K, Macgregor SA. The Importance of Kinetic and Thermodynamic Control when Assessing Mechanisms of Carboxylate-Assisted C-H Activation. J Am Chem Soc 2019; 141:8896-8906. [PMID: 31083891 DOI: 10.1021/jacs.9b02073] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The reactions of substituted 1-phenylpyrazoles (phpyz-H) at [MCl2Cp*]2 dimers (M = Rh, Ir; Cp* = C5Me5) in the presence of NaOAc to form cyclometalated Cp*M(phpyz)Cl were studied experimentally and with density functional theory (DFT) calculations. At room temperature, time-course and H/D exchange experiments indicate that product formation can be reversible or irreversible depending on the metal, the substituents, and the reaction conditions. Competition experiments with both para- and meta-substituted ligands show that the kinetic selectivity favors electron-donating substituents and correlates well with the Hammett parameter giving a negative slope consistent with a cationic transition state. However, surprisingly, the thermodynamic selectivity is completely opposite, with substrates with electron-withdrawing groups being favored. These trends are reproduced with DFT calculations that show C-H activation proceeds by an AMLA/CMD mechanism. H/D exchange experiments with the meta-substituted ligands show ortho-C-H activation to be surprising facile, although (with the exception of F substituents) this does not generally lead to ortho-cyclometalated products. Calculations suggest that this can be attributed to the difficulty of HOAc loss after the C-H activation step due to steric effects in the 16e intermediate that would be formed. Our study highlights that the use of substituent effects to assign the mechanism of C-H activation in either stoichiometric or catalytic reactions may be misleading, unless the energetics of the C-H cleavage step and any subsequent reactions are properly taken into account. The broader implications of our study for the assignment of C-H activation mechanisms are discussed.
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Affiliation(s)
- Raed A Alharis
- Department of Chemistry , University of Leicester , Leicester , United Kingdom
| | - Claire L McMullin
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh EH14 4AS , United Kingdom
| | - David L Davies
- Department of Chemistry , University of Leicester , Leicester , United Kingdom
| | - Kuldip Singh
- Department of Chemistry , University of Leicester , Leicester , United Kingdom
| | - Stuart A Macgregor
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh EH14 4AS , United Kingdom
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10
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Harrison JA, Nielson AJ, Sajjad MA, Schwerdtfeger P. Evaluation of the Agostic and Syndetic Donations in Aromatic Ring Agostic Interactions Involved in Heteroatom Ligand-Directed C–H Bond Activation. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John A. Harrison
- Chemistry, School of Natural and Computational Sciences, Massey University at Auckland, Private
bag 102904, North Shore Mail centre, Auckland 1603, New Zealand
| | - Alastair J. Nielson
- Chemistry, School of Natural and Computational Sciences, Massey University at Auckland, Private
bag 102904, North Shore Mail centre, Auckland 1603, New Zealand
| | - M. Arif Sajjad
- Department of Chemistry, University of Sialkot, 1-KM Main Daska Road, Sialkot 51040, Pakistan
| | - Peter Schwerdtfeger
- Centre for Theoretical Chemistry and Physics, Institute of Advanced Studies Massey University at Auckland, Private Bag 102904, North Shore Mail centre, Auckland 1603, New Zealand
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11
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Jerhaoui S, Djukic JP, Wencel-Delord J, Colobert F. Asymmetric, Nearly Barrierless C(sp3)–H Activation Promoted by Easily-Accessible N-Protected Aminosulfoxides as New Chiral Ligands. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04946] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Soufyan Jerhaoui
- Laboratoire d’Innovation Moléculaire et Applications, ECPM, UMR 7042, Université de Strasbourg/Université de Haute—Alsace, 25 rue Becquerel, Cedex 67087, Strasbourg, France
| | - Jean-Pierre Djukic
- Institut de Chimie de Strasbourg, UMR 7177, Université de Strasbourg, Cedex 67087, Strasbourg, France
| | - Joanna Wencel-Delord
- Laboratoire d’Innovation Moléculaire et Applications, ECPM, UMR 7042, Université de Strasbourg/Université de Haute—Alsace, 25 rue Becquerel, Cedex 67087, Strasbourg, France
| | - Françoise Colobert
- Laboratoire d’Innovation Moléculaire et Applications, ECPM, UMR 7042, Université de Strasbourg/Université de Haute—Alsace, 25 rue Becquerel, Cedex 67087, Strasbourg, France
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12
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Cornaton Y, Djukic JP. A noncovalent interaction insight onto the concerted metallation deprotonation mechanism. Phys Chem Chem Phys 2019; 21:20486-20498. [DOI: 10.1039/c9cp03650d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The CMD/AMLA mechanisms of cyclopalladation and the parent fictitious cyclonickelation of N,N-dimethylbenzylamine have been investigated by joint DFT-D and DLPNO-CCSD(T) methods assisted by QTAIM.
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Affiliation(s)
- Yann Cornaton
- Laboratoire de Mathématiques et de Physique
- F-66860 Perpignan
- France
- Institut de Chimie de Strasbourg
- UMR 7177
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13
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Sajjad MA, Harrison JA, Nielson AJ, Schwerdtfeger P. NBO Orbital Interaction Analysis for the Ambiphilic Metal–Ligand Activation/Concerted Metalation Deprotonation (AMLA/CMD) Mechanism Involved in the Cyclopalladation Reaction of N,N-Dimethylbenzylamine with Palladium Acetate. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Arif Sajjad
- Chemistry, Institute of Natural and Mathematical Sciences, Massey University, Private Bag 102904, North Shore Mail Centre, Auckland 0632, New Zealand
| | - John A. Harrison
- Chemistry, Institute of Natural and Mathematical Sciences, Massey University, Private Bag 102904, North Shore Mail Centre, Auckland 0632, New Zealand
| | - Alastair J. Nielson
- Chemistry, Institute of Natural and Mathematical Sciences, Massey University, Private Bag 102904, North Shore Mail Centre, Auckland 0632, New Zealand
| | - Peter Schwerdtfeger
- Centre for Theoretical Chemistry and Physics, Institute of Advanced Studies Massey University at Auckland, Private
Bag 102904, North Shore Mail Centre, Auckland 0745, New Zealand
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14
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Sajjad MA, Schwerdtfeger P, Harrison JA, Nielson AJ. Electronic manipulation of the agostic and syndetic components in 1-tetralone oxime and imine complexes of palladium (II). Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Lu Q, Neese F, Bistoni G. Formation of Agostic Structures Driven by London Dispersion. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801531] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qing Lu
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Giovanni Bistoni
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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16
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Lu Q, Neese F, Bistoni G. Formation of Agostic Structures Driven by London Dispersion. Angew Chem Int Ed Engl 2018; 57:4760-4764. [PMID: 29512254 DOI: 10.1002/anie.201801531] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Indexed: 01/08/2023]
Abstract
Agostic interactions between a C-H bond and a transition metal are commonly crucial in catalytic polymerization processes. Herein, a quantitative study of the nature of β-agostic interactions in a series of systems of importance in C-H bond activation reactions is reported. The analysis, characterized by the use of a coupled-cluster-based energy decomposition scheme, demonstrates that short-range London dispersion between the agostic C-H bond and the metal center plays a fundamental role in affecting the structural stability of these systems, contrary to a widely held view. These results are used to rationalize a series of previously published experimental findings.
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Affiliation(s)
- Qing Lu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Giovanni Bistoni
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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17
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Beck R, Camadanli S, Klein H. Spontaneous Bicyclometalation of a Single Cobalt(I) Complex Stabilized by a δ‐C–H Agostic Interaction. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701221] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Robert Beck
- Eduard‐Zintl‐Institut für Anorganische und Physikalische Chemie der Technischen Universität Darmstadt Alarich‐Weiss‐Str. 12 64287 Darmstadt Germany
| | - Sebnem Camadanli
- Eduard‐Zintl‐Institut für Anorganische und Physikalische Chemie der Technischen Universität Darmstadt Alarich‐Weiss‐Str. 12 64287 Darmstadt Germany
| | - Hans‐Friedrich Klein
- Eduard‐Zintl‐Institut für Anorganische und Physikalische Chemie der Technischen Universität Darmstadt Alarich‐Weiss‐Str. 12 64287 Darmstadt Germany
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18
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Mahmoudi G, Zaręba JK, Bauzá A, Kubicki M, Bartyzel A, Keramidas AD, Butusov L, Mirosław B, Frontera A. Recurrent supramolecular motifs in discrete complexes and coordination polymers based on mercury halides: prevalence of chelate ring stacking and substituent effects. CrystEngComm 2018. [DOI: 10.1039/c7ce02166f] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We report the synthesis, X-ray characterization and DFT study of five Hg(ii) complexes with Schiff bases containing a nicotinohydrazide core to explore the formation of chelate-ring π-stacking interactions.
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Affiliation(s)
- Ghodrat Mahmoudi
- Department of Chemistry
- Faculty of Science
- University of Maragheh
- Maragheh
- Iran
| | - Jan K. Zaręba
- Advanced Materials Engineering and Modelling Group
- Wroclaw University of Science and Technology
- Wrocław
- Poland
| | - Antonio Bauzá
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma (Baleares)
- Spain
| | - Maciej Kubicki
- Faculty of Chemistry
- Adam Mickiewicz University in Poznan
- 61-614 Poznań
- Poland
| | - Agata Bartyzel
- Department of General and Coordination Chemistry
- Maria Curie-Skłodowska University
- 20-031 Lublin
- Poland
| | | | | | - Barbara Mirosław
- Department of Crystallography
- Faculty of Chemistry
- Maria Curie-Sklodowska University
- 20-031 Lublin
- Poland
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma (Baleares)
- Spain
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