1
|
Race JJ, Hudson LA, Albrecht M. Stable CAAC-Triazenes: A New Nitrogen Ligand System With Donor and Conformational Flexibility, and With Application in Olefin Activation Catalysis. Chemistry 2024; 30:e202400400. [PMID: 38687878 DOI: 10.1002/chem.202400400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/30/2024] [Accepted: 04/30/2024] [Indexed: 05/02/2024]
Abstract
N-heterocyclic imines such as pyridylidene amines impart high catalytic activity when coordinated to a transition metal, largely imposed by their electronic flexibility. Here, this donor flexibility has been applied for the first time to CAAC-based systems through the synthesis of CAAC-triazenes. These new ligands offer a larger π-conjugation that extends from the N-heterocyclic carbene through three nitrogens rather than just one, as observed in N-heterocyclic imines. We demonstrate the straightforward synthesis of three new CAAC-triazenes containing different substituents on the terminal triazene nitrogen. These compounds are remarkably stable up to 120 °C without loss of N2 as typically observed with similar triazenes. E-to-Z isomerization within the triazene is instigated by UV light and is partially reversible dependent on the triazene substituent. The quinoline-substituted CAAC-triazene 1-Q has been applied as an L,L'-type ligand in the synthesis of [PdCl2(1-Q)], [PdCl(Me)(1-Q)] and [Pd(Me)(H2O(1-Q)]+. E-to-Z ligand isomerization also occurs when coordinated to PdCl2, providing access to on-metal manipulation. The cationic complex [PdMe(H2O)(1-Q)]+ is a precatalyst for oligomerization of ethylene to form initially 2-butene and subsequently linear and branched C8-C12 products from butene activation. Moreover, isomerization of 1-hexene takes place efficiently with exceptionally low catalyst loading (10 ppm) and up to 74,000 turnover numbers.
Collapse
Affiliation(s)
- James J Race
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern
| | - Luke A Hudson
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern
| | - Martin Albrecht
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern
| |
Collapse
|
2
|
Cheung CS, Qiu Z, Li D, Deng H, Zheng H, Gao H. Experimental and theoretical insights into palladium-mediated polymerization of para-N, N-disubstituted aminostyrene. Dalton Trans 2023; 52:17573-17582. [PMID: 37966170 DOI: 10.1039/d3dt03146b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Experimental and theoretical insights into polymerization of para-N,N-disubstituted aminostyrene monomers (St-4-NR2, R = Me, Et, Ph) using cationic α-diimine palladium complexes have been initially reported. The effects of the catalyst structure and monomer substituent were studied systematically. Polymerization turnover frequency (TOF) was shown to decrease in the order of monomer substituents Me > Et > Ph, whereas the molecular weight of the produced polymers showed an opposite trend (Me < Et < Ph). Methanol-mediated polymerization of para-N,N-dimethylaminostyrene (DMAS), along with polymer chain-end analysis, and palladium intermediate isolation proved that palladium-initiated DMAS polymerization obeyed a cationic mechanism. Comprehensive theoretical calculations further revealed that the carbocation was generated from the insertion of DMAS into the palladium center rather than the polarization of the methyl palladium intermediate with a coordinated DMAS. The produced amine-functionalized amorphous polystyrenes have low stereoregularity and exhibit good hydrophilic properties. The poly(para-N,N-disphenylaminostyrene) is a luminescent polymer and shows fluorescence properties, rendering this material a promising candidate for versatile potential applications.
Collapse
Affiliation(s)
- Chi Shing Cheung
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Zonglin Qiu
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Donghui Li
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Huiyun Deng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China.
| |
Collapse
|
3
|
Suslov DS, Suchkova AV, Bykov MV, Abramov ZD, Pakhomova MV, Orlov TS, Ushakov IA, Borodina TN, Smirnov VI. Cationic palladium(II)–acetylacetonate complexes bearing pyridinyl imine ligands as catalysts for the hydroamination of phenylacetylene and polymerization of norbornene. MENDELEEV COMMUNICATIONS 2023. [DOI: 10.1016/j.mencom.2023.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|
4
|
Alberoni C, D’Alterio MC, Balducci G, Immirzi B, Polentarutti M, Pellecchia C, Milani B. Tunable “In-Chain” and “At the End of the Branches” Methyl Acrylate Incorporation in the Polyolefin Skeleton through Pd(II) Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05326] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Chiara Alberoni
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Massimo C. D’Alterio
- Dipartimento di Chimica e Biologia ″A. Zambelli″, Università di Salerno, via Giovanni Paolo II 132, I-84084 Fisciano, SA, Italy
| | - Gabriele Balducci
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Barbara Immirzi
- Istituto per i Polimeri, Compositi e Biomateriali, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, NA, Italy
| | - Maurizio Polentarutti
- Elettra − Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, Trieste 34149, Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e Biologia ″A. Zambelli″, Università di Salerno, via Giovanni Paolo II 132, I-84084 Fisciano, SA, Italy
| | - Barbara Milani
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| |
Collapse
|
5
|
Alternating copolymerization of carbon monoxide and vinyl arenes using [N,N] bidentate palladium catalysts. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
6
|
Lee S, Chae J, Yang Y, Lee I, Jang H. (Iminopyridine)Pd (II) complexes as versatile catalysts for copolymerization and terpolymerization of vinyl arene, ethylene, and carbon monoxide. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Seulchan Lee
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Ju‐Hyung Chae
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Yongmoon Yang
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - In‐Hwan Lee
- Department of Chemistry Ajou University Suwon 16499 South Korea
| | - Hye‐Young Jang
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| |
Collapse
|
7
|
Ó Máille GM, Dall'Anese A, Grossenbacher P, Montini T, Milani B, Albrecht M. Modulation of N^N'-bidentate chelating pyridyl-pyridylidene amide ligands offers mechanistic insights into Pd-catalysed ethylene/methyl acrylate copolymerisation. Dalton Trans 2021; 50:6133-6145. [PMID: 33973584 DOI: 10.1039/d1dt00389e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The efficient copolymerisation of functionalised olefins with alkenes continues to offer considerable challenges to catalyst design. Based on recent work using palladium complexes containing a dissymmetric N^N'-bidentate pyridyl-PYA ligand (PYA = pyridylidene amide), which showed a high propensity to insert methyl acrylate, we have here modified this catalyst structure by inserting shielding groups either into the pyridyl fragment, or the PYA unit, or both to avoid fast β-hydrogen elimination. While a phenyl substituent at the pyridyl side impedes catalytic activity completely and leads to an off-cycle cyclometallation, the introduction of an ortho-methyl group on the PYA side of the N^N'-ligand was more prolific and doubled the catalytic productivity. Mechanistic investigations with this ligand system indicated the stabilisation of a 4-membered metallacycle intermediate at room temperature, which has previously been postulated and detected only at 173 K, but never observed at ambient temperature so far. This intermediate was characterised by solution NMR spectroscopy and rationalises, in part, the formation of α,β-unsaturated esters under catalytic conditions, thus providing useful principles for optimised catalyst design.
Collapse
Affiliation(s)
- Gearóid M Ó Máille
- Department of Chemistry & Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.
| | | | | | | | | | | |
Collapse
|
8
|
Xiao Z, Zhong L, Du C, Du W, Zheng H, Cheung CS, Wang L, Gao H. Unprecedented Steric and Positioning Effects of Comonomer Substituents on α-Diimine Palladium-Catalyzed Vinyl Arene/CO Copolymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02227] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zefan Xiao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Liu Zhong
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Cheng Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Wenbo Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Chi Shing Cheung
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Lingzhi Wang
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| |
Collapse
|
9
|
Dall’Anese A, Fiorindo M, Olivieri D, Carfagna C, Balducci G, Alessio E, Durand J, Milani B. Pd-Catalyzed CO/Vinyl Arene Copolymerization: when the Stereochemistry is Controlled by the Comonomer. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Dall’Anese
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Mattia Fiorindo
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Diego Olivieri
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Carla Carfagna
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Jérôme Durand
- Laboratoire de Chimie de Coordination UPR CNRS 8241, composante ENSIACET, Université de Toulouse, 4 Allée Emile Monso-CS 44362, 31030 Toulouse, Cedex 4, France
| | - Barbara Milani
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| |
Collapse
|
10
|
Bayardon J, Rousselle B, Rousselin Y, Bonnin Q, Malacea-Kabbara R. P-Chirogenic Triazole-Based Phosphine: Synthesis, Coordination Chemistry, and Asymmetric Catalysis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jérôme Bayardon
- ICMUB-OCS (UMR-CNRS 6302); Institut de Chimie Moléculaire de l'Université de Bourgogne-Franche-Comté; 19 avenue A. Savary BP 47870 21078 Dijon CEDEX France
| | - Benjamin Rousselle
- ICMUB-OCS (UMR-CNRS 6302); Institut de Chimie Moléculaire de l'Université de Bourgogne-Franche-Comté; 19 avenue A. Savary BP 47870 21078 Dijon CEDEX France
| | - Yoann Rousselin
- ICMUB-OCS (UMR-CNRS 6302); Institut de Chimie Moléculaire de l'Université de Bourgogne-Franche-Comté; 19 avenue A. Savary BP 47870 21078 Dijon CEDEX France
| | - Quentin Bonnin
- ICMUB-OCS (UMR-CNRS 6302); Institut de Chimie Moléculaire de l'Université de Bourgogne-Franche-Comté; 19 avenue A. Savary BP 47870 21078 Dijon CEDEX France
| | - Raluca Malacea-Kabbara
- ICMUB-OCS (UMR-CNRS 6302); Institut de Chimie Moléculaire de l'Université de Bourgogne-Franche-Comté; 19 avenue A. Savary BP 47870 21078 Dijon CEDEX France
| |
Collapse
|
11
|
Shanahan RM, Hickey A, Bateman LM, Light ME, McGlacken GP. One-Pot Cross-Coupling/C-H Functionalization Reactions: Quinoline as a Substrate and Ligand through N-Pd Interaction. J Org Chem 2020; 85:2585-2596. [PMID: 31971802 DOI: 10.1021/acs.joc.9b03321] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Herein, we report a one-pot process that marries mechanistically distinct, traditional cross-coupling reactions with C-H functionalization using the same precatalyst. The reactions proceed in yields of up to 95%, in air, and require no extraneous ligand. The reactions are thought to be facilitated by harnessing the substrate quinoline as an N-ligand, and evidence of the palladium-quinoline interaction is provided by 1H-15N HMBC NMR spectroscopy and X-ray crystallographic structures. Application of the methodology is demonstrated by the quick formation of fluorescent, π-extended frameworks.
Collapse
Affiliation(s)
- Rachel M Shanahan
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland
| | - Aobha Hickey
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland
| | - Lorraine M Bateman
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland.,Synthesis and Solid State Pharmaceutical Centre (SSPC) , University College Cork , Cork T12 YN60 , Ireland.,School of Pharmacy , University College Cork , Cork T12 YN60 , Ireland
| | - Mark E Light
- Department of Chemistry , University of Southampton , Southampton SO17 1BJ , United Kingdom
| | - Gerard P McGlacken
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland.,Synthesis and Solid State Pharmaceutical Centre (SSPC) , University College Cork , Cork T12 YN60 , Ireland
| |
Collapse
|
12
|
Dall’Anese A, Rosar V, Cusin L, Montini T, Balducci G, D’Auria I, Pellecchia C, Fornasiero P, Felluga F, Milani B. Palladium-Catalyzed Ethylene/Methyl Acrylate Copolymerization: Moving from the Acenaphthene to the Phenanthrene Skeleton of α-Diimine Ligands. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00308] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Anna Dall’Anese
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Vera Rosar
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Luca Cusin
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Tiziano Montini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
- INSTM Trieste Research Unit and ICCOM-CNR Third Parties Research Unit, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Gabriele Balducci
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Ilaria D’Auria
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, via Giovanni Paolo II 132, I-84084 Fisciano (SA), Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, via Giovanni Paolo II 132, I-84084 Fisciano (SA), Italy
| | - Paolo Fornasiero
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
- INSTM Trieste Research Unit and ICCOM-CNR Third Parties Research Unit, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Fulvia Felluga
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Barbara Milani
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| |
Collapse
|
13
|
Xiao Z, Zheng H, Du C, Zhong L, Liao H, Gao J, Gao H, Wu Q. Enhancement on Alternating Copolymerization of Carbon Monoxide and Styrene by Dibenzobarrelene-Based α-Diimine Palladium Catalysts. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01786] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zefan Xiao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Cheng Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Liu Zhong
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Heng Liao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Jie Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Qing Wu
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| |
Collapse
|
14
|
Navarro M, Rosar V, Montini T, Milani B, Albrecht M. Olefin Dimerization and Isomerization Catalyzed by Pyridylidene Amide Palladium Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00422] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miquel Navarro
- Department für Chemie und Biochemie, Universität Bern, CH−3012 Bern, Switzerland
| | - Vera Rosar
- Department für Chemie und Biochemie, Universität Bern, CH−3012 Bern, Switzerland
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Tiziano Montini
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Barbara Milani
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Martin Albrecht
- Department für Chemie und Biochemie, Universität Bern, CH−3012 Bern, Switzerland
| |
Collapse
|
15
|
Seyfi S, Alizadeh R, Darvish Ganji M, Amani V. Synthesis, spectral and luminescence study, crystal structure determination and DFT calculation of binuclear palladium(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 190:298-311. [PMID: 28941414 DOI: 10.1016/j.saa.2017.09.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/18/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
Binuclear palladium(II) complexes with metal-metal (d8-d8) bonding interaction were synthesized by reactions of the 1-methyl-1H-1,2,3,4-tetrazole-5-thiol (Hmtzt) or a mixture of Hmtzt and 1,3-propanediamine (1,3-pda) ligands. Complex [Pd2(μ-mtzt)4]·2CH3CN (1) was synthesized by the reaction of Pd(OAc)2 with Hmtzt dissolved in acetonitrile and complex [Pd2(μ-mtzt)2(mtzt)2(1,3-pda)] (2) was synthesized by reaction of a mixture of Hmtzt and 1,3-propanediamine (dissolved in methanol) with PdCl2 (dissolved in acetonitrile) and were identified through elemental analysis, IR, UV-Vis, 1H NMR, luminescence spectroscopy as well as single-crystal X-ray diffraction method. A single-crystal of complex 1 shows that two Pd(II) centers are linked together by four bridging tetrazole ligands providing a paddle wheel-like arrangement. Also a crystal structure of complex 2 shows that this complex possesses a symmetric structure in which one Pd atom is tetra-coordinated by four sulfur atoms to forms PdS4 and other Pd atom is tetra-coordinated by four nitrogen to forms PdN4 coordination sphere. Density functional theory (DFT) was performed in this study for the Hmtzt ligand and binuclear palladium(II) complexes (1) and (2). The DFT calculation shows PdII-PdII bond lengths of 2.831 and 3.086Å in complex 1 and 2, respectively which are close to the observed bond lengths of 2.802(11) and 3.0911(17)Å from single-crystal X-ray structure. The optimized geometry of the complexes is shown good agreement by X-ray data. Structural properties and molecular descriptors including bond lengths, bond angles, chemical hardness, dipole moment, HOMO-LUMO energy levels, electron transfer were analyzed. The IR spectroscopy was performed using VEDA4 software and UV-Vis spectra were analyzed using time-dependent density functional theory (TD-DFT) method. The theoretical and experimental data were also compared with each other.
Collapse
Affiliation(s)
- S Seyfi
- School of Chemistry, Damghan University, P.O. Box 36715-364, Damghan, Iran
| | - R Alizadeh
- School of Chemistry, Damghan University, P.O. Box 36715-364, Damghan, Iran.
| | - M Darvish Ganji
- Department of Nanochemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran.
| | - V Amani
- Department of Chemistry, Farhangian University, Tehran, Iran
| |
Collapse
|
16
|
Rosar V, Meduri A, Montini T, Fornasiero P, Zangrando E, Milani B. The contradictory effect of the methoxy-substituent in palladium-catalyzed ethylene/methyl acrylate cooligomerization. Dalton Trans 2018; 47:2778-2790. [DOI: 10.1039/c7dt04465h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new α-diimines bearing at least one methoxy group on one aryl ring were investigated. The introduction of the methoxy substituent on the ancillary ligand had a remarkable effect on the catalytic performances of the relevant palladium complexes.
Collapse
Affiliation(s)
- V. Rosar
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
- Consorzio Interuniversitario per la Reattività Chimica e la Catalisi CIRCC
| | - A. Meduri
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - T. Montini
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Trieste Research Unit and ICCOM-CNR Trieste Research Unit
| | - P. Fornasiero
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Trieste Research Unit and ICCOM-CNR Trieste Research Unit
| | - E. Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - B. Milani
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| |
Collapse
|
17
|
Rosar V, Montini T, Balducci G, Zangrando E, Fornasiero P, Milani B. Palladium-Catalyzed Ethylene/Methyl Acrylate Co-Oligomerization: The Effect of a New Nonsymmetrical α-Diimine with the 1,4-Diazabutadiene Skeleton. ChemCatChem 2017. [DOI: 10.1002/cctc.201700504] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vera Rosar
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
- Consorzio Interuniversitario per la Reattività Chimica e la Catalisi CIRCC; Via Celso Ulpiani 27 70126 Bari Italy
| | - Tiziano Montini
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
- ICCOM-CNR and INSTM Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
- ICCOM-CNR and INSTM Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Barbara Milani
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| |
Collapse
|