1
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Li A, Huang K, Pan W, Wu Y, Liang Y, Zhang Z, Wu D, Ma L, Gou Y. Thiosemicarbazone Mixed-Valence Cu(I/II) Complex against Lung Adenocarcinoma Cells through Multiple Pathways Involving Cuproptosis. J Med Chem 2024; 67:9091-9103. [PMID: 38778566 DOI: 10.1021/acs.jmedchem.4c00257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Induction of cuproptosis and targeting of multiple signaling pathways show promising applications in tumor therapy. In this study, we synthesized two thiosemicarbazone-copper complexes ([CuII(L)Cl] 1 and [CuII2CuI(L)2Cl3] 2, where HL is the (E)-N-methyl-2-(phenyl(pyridin-2-yl)methylene ligand), to assess their antilung cancer activities. Both copper complexes showed better anticancer activity than cisplatin and exhibited hemolysis comparable to that of cisplatin. In vivo experiments showed that complex 2 retarded the A549 cell growth in a mouse xenograft model with low systemic toxicity. Primarily, complex 2 kills lung cancer cells in vitro and in vivo by triggering multiple pathways, including cuproptosis. Complex 2 is the first mixed-valent Cu(I/II) complex to induce cellular events consistent with cuproptosis in cancer cells, which may stimulate the development of mixed-valent copper complexes and provide effective cancer therapy.
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Affiliation(s)
- Aili Li
- Laboratory of Respiratory Diseases, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
- Key Laboratory of Basic Research on Respiratory Diseases, Guangxi Health Commission, Guilin 541001, P. R. China
| | - Kai Huang
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, Guilin Medical University, Guilin 541001, P. R. China
- Department of Scientific Research, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
| | - Weiping Pan
- Laboratory of Respiratory Diseases, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
| | - Youru Wu
- Laboratory of Respiratory Diseases, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
| | - Yuwei Liang
- Department of Scientific Research, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
| | - ZhenLei Zhang
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Daqi Wu
- Laboratory of Respiratory Diseases, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
| | - Libing Ma
- Laboratory of Respiratory Diseases, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
- Key Laboratory of Basic Research on Respiratory Diseases, Guangxi Health Commission, Guilin 541001, P. R. China
| | - Yi Gou
- Laboratory of Respiratory Diseases, The Affiliated Hospital of Guilin Medical University, Guilin 541001, P. R. China
- Key Laboratory of Basic Research on Respiratory Diseases, Guangxi Health Commission, Guilin 541001, P. R. China
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2
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Large B, Plais R, Gaucher A, Prim D. Pyridylmethylamines a modular and underrated family of ligands in both metal- and organo-catalysis. VIETNAM JOURNAL OF CHEMISTRY 2020. [DOI: 10.1002/vjch.202000031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Benjamin Large
- Université Paris-Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles; 78035 Versailles France
| | - Romain Plais
- Université Paris-Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles; 78035 Versailles France
| | - Anne Gaucher
- Université Paris-Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles; 78035 Versailles France
| | - Damien Prim
- Université Paris-Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles; 78035 Versailles France
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3
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Santra A, Brandao P, Mondal G, Bera P, Jana A, Bhattacharyya I, Pramanik C, Bera P. Monomeric and dimeric cadmium(II) complexes of S-alkyl/aryl dithiocarbazate as single-source precursors for cadmium sulfide nanoparticles: An experimental, theoretical interpretation in the stability of precursor and visible light dye degradation study. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Deciphering preferred geometries of pyridylmethylamines-based complexes: A robust strategy combining NMR, DFT and X-ray. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Keum C, Cho J, Park S, Lee S. Copper‐Coordinated Histidyl Bolaamphiphile Assembly as an Oxidative Catalyst: Coordination Structure and Catalytic Activity in Cyclohexane Oxidation. ChemCatChem 2019. [DOI: 10.1002/cctc.201900968] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Changjoon Keum
- Department of Chemical and Biomolecular EngineeringYonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 03722 Korea
| | - Junghyun Cho
- Department of Chemical and Biomolecular EngineeringYonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 03722 Korea
| | - Sunggook Park
- Department of Mechanical and Industrial EngineeringLouisiana State University Baton Rouge LA, 70803 USA
| | - Sang‐Yup Lee
- Department of Chemical and Biomolecular EngineeringYonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 03722 Korea
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6
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Krasnovskaya OO, Fedorov YV, Gerasimov VM, Skvortsov DA, Moiseeva AA, Mironov AV, Beloglazkina EK, Zyk NV, Majouga AG. Novel 2-aminoimidazole-4-one complexes of copper(II) and cobalt(II): Synthesis, structural characterization and cytotoxicity. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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7
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Dai Q, Liu H, Gao C, Li W, Zhu C, Lin C, Tan Y, Yuan Z, Jiang Y. A one-step synthesized acridine-based fluorescent chemosensor for selective detection of copper(ii) ions and living cell imaging. NEW J CHEM 2018. [DOI: 10.1039/c7nj03615a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly selective and sensitive fluorescence quenching chemosensor (ACC) for Cu2+ detection in HEPES buffer and living cell imaging was developed.
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Affiliation(s)
- Qiuzi Dai
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
| | - Haiyang Liu
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
| | - Chunmei Gao
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
- the Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
| | - Wenlu Li
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
| | - Caizhen Zhu
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Chengdong Lin
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Ying Tan
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
- the Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
| | - Zigao Yuan
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
| | - Yuyang Jiang
- The Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology
- the Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
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8
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Sengupta A, Rajput A, Barman SK, Mukherjee R. Low-spin [M II(L) 2] and [M III(L) 2] + (M = Fe and Co) complexes of tridentate azo-containing pyridine/pyrazine amide ligands: structures, properties and redox potential correlations. Dalton Trans 2017; 46:11291-11305. [PMID: 28805866 DOI: 10.1039/c7dt01577a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using deprotonated forms of tridentate azo-containing pyridine-2-/pyrazine-2-carboxamide 2-[N-(2-phenylazo)carbamoyl]-pyridine/pyrazine, seven bis-ligand complexes of FeII/CoII and FeIII/CoIII have been synthesized. Molecular structures of six of them reveal that these six-coordinate complexes utilize all available donor sites of the ligands and assume MII/IIIN2(pyridine/pyrazine)N'2(amide)N''2(azo) coordination. Complexes of FeII and CoIII are diamagnetic and those of FeIII and CoII are paramagnetic (S = 1/2; room-temperature magnetic data and EPR spectra). Cyclic voltammetry experiments in CH2Cl2 reveal facile metal-centred FeIII/FeII and CoIII/CoII redox responses, and all complexes display quasireversible-to-irreversible ligand(azo)-centred redox processes. The E1/2 values of MIII/MII redox processes for Fe, Co and Ni (reported earlier) complexes of the pyridine amide ligand linearly correlate with those for six-coordinate [MIII(bpy)3]3+/[MII(bpy)3]2+, [MIII(terpy)2]3+/[MII(terpy)2]2+, [MIII(L)]+/[MII(L)]0 or [MIII(L')2]+/[MII(L')2]0 (bpy = 2,2'-bipyridine, terpy = 2,2':6',2''-terpyridine, hexadentate L(2-) = 1,4-bis[o-(pyridine-2-carboxamidophenyl)]-1,4-dithiobutane and tridentate L'(-) = {2-[2-(arylimino)phenylazo]-pyridine}) couples. Density functional theory (DFT) at the B3LYP level and time-dependent (TD)-DFT calculations rationalize the electronic structure of the present complexes and throw light on the origin of observed electronic transitions.
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Affiliation(s)
- Arunava Sengupta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India.
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9
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Angel NR, Khatib RM, Jenkins J, Smith M, Rubalcava JM, Le BK, Lussier D, Chen ZG, Tham FS, Wilson EH, Eichler JF. Copper (II) complexes possessing alkyl-substituted polypyridyl ligands: Structural characterization and in vitro antitumor activity. J Inorg Biochem 2016; 166:12-25. [PMID: 27815978 DOI: 10.1016/j.jinorgbio.2016.09.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 09/16/2016] [Accepted: 09/29/2016] [Indexed: 12/13/2022]
Abstract
In an effort to find alternatives to the antitumor drug cisplatin, a series of copper (II) complexes possessing alkyl-substituted polypyridyl ligands have been synthesized. Eight new complexes are reported herein: μ-dichloro-bis{2,9-di-sec-butyl-1,10-phenanthrolinechlorocopper(II)} {[(di-sec-butylphen)ClCu(μ-Cl)2CuCl(di-sec-butylphen)]}(1), 2-sec-butyl-1,10-phenanthrolinedichlorocopper(II) {[mono-sec-butylphen) CuCl2} (2), 2,9-di-n-butyl-1,10-phenanthrolinedichlorocopper(II) {[di-n-butylphen) CuCl2}(3), 2-n-butyl-1,10-phenanthrolinedichlorocopper(II) {[mono-n-butylphen) CuCl2} (4), 2,9-di-methyl-1,10-phenanthrolineaquadichlorocopper(II) {[di-methylphen) Cu(H2O)Cl2}(5), μ-dichloro-bis{6-sec-butyl-2,2'-bipyridinedichlorocopper(II)} {(mono-sec-butylbipy) ClCu(μ-Cl)2CuCl(mono-sec-butylbipy)} (6), 6,6'-di-methyl-2,2'-bipyridinedichlorocopper(II) {6,6'-di-methylbipy) CuCl2} (7), and 4,4'-dimethyl-2,2'-bipyridinedichlorocopper(II) {4,4'-di-methylbipy) CuCl2} (8). These complexes have been characterized via elemental analysis, UV-vis spectroscopy, and mass spectrometry. Single crystal X-ray diffraction experiments revealed the complexes synthesized with the di-sec-butylphen ligand (1) and mono-sec-butylbipy ligand (6) crystallized as dimers in which two copper(II) centers are bridged by two chloride ligands. Conversely, complexes 2, 7, and 8 were isolated as monomeric species possessing distorted tetrahedral geometries, and the [(di-methylphen)Cu(H2O)Cl2] (5) complex was isolated as a distorted square pyramidal monomer possessing a coordinating aqua ligand. Compounds 1-8 were evaluated for their in vitro antitumor efficacy. Compounds 1, 5, and 7 in particular were found to exhibit remarkable activity against human derived lung cancer cells, yet this class of copper(II) compounds had minimal cytotoxic effect on non-cancerous cells. In vitro control experiments indicate the activity of the copper(II) complexes most likely does not arise from the formation of CuCl2 and free polypyridyl ligand, and preliminary solution state studies suggest these compounds are generally stable in biological buffer. The results presented herein suggest further development of this class of copper-based drugs as potential anti-cancer therapies should be pursued.
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Affiliation(s)
- Noah R Angel
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Raneen M Khatib
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Julia Jenkins
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Michelle Smith
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Justin M Rubalcava
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Brian Khoa Le
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Daniel Lussier
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | | | - Fook S Tham
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States
| | - Emma H Wilson
- University of California, Riverside School of Medicine, Division of Biomedical Sciences, United States
| | - Jack F Eichler
- University of California, Riverside Department of Chemistry, 501 Big Springs Rd., Riverside, CA 92521, United States.
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10
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Liu H, Wu F, Zhang B, Tan C, Chen Y, Hao G, Tan Y, Jiang Y. A simple quinoline-derived fluorescent sensor for the selective and sequential detection of copper(ii) and sulfide ions and its application in living-cell imaging. RSC Adv 2016. [DOI: 10.1039/c6ra15938a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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11
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Todorović T, Grubišić S, Pregelj M, Jagodič M, Misirlić‐Denčić S, Dulović M, Marković I, Klisurić O, Malešević A, Mitić D, Anđelković K, Filipović N. Structural, Magnetic, DFT, and Biological Studies of Mononuclear and Dinuclear Cu
II
Complexes with Bidentate N‐Heteroaromatic Schiff Base Ligands. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500349] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tamara Todorović
- Department of General and Inorganic Chemistry, University of Belgrade – Faculty of Chemistry, Studentski trg 12–16, 11000 Belgrade, Serbia
| | - Sonja Grubišić
- Center for Chemistry, IHTM, University of Belgrade, Njegoševa 12, 11001 Belgrade, Serbia
| | - Matej Pregelj
- Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Marko Jagodič
- Institute of Mathematics, Physics and Mechanics, Jadranska 19, 1000 Ljubljana, Slovenia
| | - Sonja Misirlić‐Denčić
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Pasterova 2, 11000 Belgrade, Serbia
| | - Marija Dulović
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Pasterova 2, 11000 Belgrade, Serbia
| | - Ivanka Marković
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Pasterova 2, 11000 Belgrade, Serbia
| | - Olivera Klisurić
- Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, 21000 Novi Sad, Serbia
| | - Aleksandar Malešević
- Department of General and Inorganic Chemistry, University of Belgrade – Faculty of Chemistry, Studentski trg 12–16, 11000 Belgrade, Serbia
| | - Dragana Mitić
- Department of General and Inorganic Chemistry, University of Belgrade – Faculty of Chemistry, Studentski trg 12–16, 11000 Belgrade, Serbia
| | - Katarina Anđelković
- Department of General and Inorganic Chemistry, University of Belgrade – Faculty of Chemistry, Studentski trg 12–16, 11000 Belgrade, Serbia
| | - Nenad Filipović
- Department of Chemistry and Biochemistry, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11000 Belgrade, Serbia, http://www.agrif.bg.ac.rs/profiles/view/242
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12
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Requet A, Colin O, Bourdreux F, Salim SM, Marque S, Thomassigny C, Greck C, Farjon J, Prim D. Pyridylalkylamine ligands and their palladium complexes: structure and reactivity revisited by NMR. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:273-278. [PMID: 24652706 DOI: 10.1002/mrc.4058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 01/28/2014] [Accepted: 02/17/2014] [Indexed: 06/03/2023]
Abstract
Pyridylmethylamines or pma are versatile platforms for different catalytic transformations. Five pma-ligands and their respective Pd complexes have been studied by liquid state NMR. By comparing (1)H, (13)C and (15)N chemical shifts for each pma/pma-Pd couple, a general trend for the metallacycle atoms concerns variations of the electronic distribution at the pendant arm, especially at the nitrogen atom of the ligand. Moreover, the increase of the chemical shift of the pendant arm nitrogen atom from primary to tertiary amine is also related to the increase of crowding within the complex. This statement is in good agreement with X-ray data collected for several complexes. Catalytic results for the Suzuki-Miyaura reaction involving the pma-Pd complexes showed within this series that a sterically crowded and electron-rich ligand in the metallacycle was essential to reach the coupling product with a good selectivity. In this context, NMR study of chemical shifts of all active nuclei especially in the metallacycle could give a trend of reactivity in the studied family of pma-Pd complexes.
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Affiliation(s)
- Alexandre Requet
- Université de Versailles Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles, UMR CNRS 8180, 45, avenue des Etats-Unis, 78035, Versailles, France
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13
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Kamel AH, Kalifa ME, Abd El-Maksoud SA, Egendy FA. Fabrication of novel sensors based on a synthesized acyclic pyridine derivative ionophore for potentiometric monitoring of copper. ANAL. METHODS 2014; 6:7814-7822. [DOI: 10.1039/c4ay00818a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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14
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Li X, Yang X, Li Y, Gou Y, Wang Q. Synthesis, structure and urease inhibition studies of dimeric copper(II) complexes with a tridentate Schiff base ligand derived from tetrahydrofurfurylamine. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Wang D, Lindeman SV, Fiedler AT. Intramolecular Hydrogen Bonding in CuIIComplexes with 2,6-Pyridinedicarboxamide Ligands: Synthesis, Structural Characterization, and Physical Properties. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300579] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Beloglazkina EK, Majouga AG, Antipin RL, Myannik KA, Moiseeva AA, Zyk NV. Novel copper(II) and cobalt(II) complexes with selenium substituted imidazolyl imines. The molecular and crystal structure of [N-(2-(phenylseleno)ethyl)-N-(imidazol-2-ylmethylene)amine]copper(II) dichloride. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.11.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Guadalupe Quintero-Téllez M, de Jesús Rosales Hoz M, Bernès S, Zamorano-Ulloa R, Ramírez-Rosales D, Alcántara-Flores JL, Reyes-Ortega Y. Synthesis, structural, electronic and magnetic studies of [Cu(II)(saleanN3H3)]. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.08.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Rajput A, Mukherjee R. Coordination chemistry with pyridine/pyrazine amide ligands. Some noteworthy results. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.03.024] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Marque S, Razafimahaléo V, Dinut A, Grach G, Prim D, Moreau X, Gil R. On the molecular structure and geometry of pyridylalkylamine–H+ complexes: application to catalytic enantioselective hydroxyalkylation of indoles. NEW J CHEM 2013. [DOI: 10.1039/c3nj00310h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Shteinman AA. Structure and catalytic activity of a new iron(II) complex with a tetradentate carboxamide ligand: The effect of the outer-sphere donor on the chemoselectivity of the metal complex catalyst. RUSS J INORG CHEM+ 2012. [DOI: 10.1134/s0036023612100129] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Grach G, Pieters G, Dinut A, Terrasson V, Medimagh R, Bridoux A, Razafimahaleo V, Gaucher A, Marque S, Marrot J, Prim D, Gil R, Planas JG, Viñas C, Thomas I, Roblin JP, Troin Y. N-Heterocyclic Pyridylmethylamines: Synthesis, Complexation, Molecular Structure, and Application to Asymmetric Suzuki–Miyaura and Oxidative Coupling Reactions. Organometallics 2011. [DOI: 10.1021/om200375s] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guillaume Grach
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
- Equipe de Catalyse Moléculaire, Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), UMR CNRS 8182, bât. 420, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Grégory Pieters
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Aurelia Dinut
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
- Equipe de Catalyse Moléculaire, Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), UMR CNRS 8182, bât. 420, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Vincent Terrasson
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Raouf Medimagh
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Alexandre Bridoux
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Vanessa Razafimahaleo
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Anne Gaucher
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Sylvain Marque
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Jérôme Marrot
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Damien Prim
- Université de Versailles, Saint-Quentin-en-Yvelines, Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Richard Gil
- Equipe de Catalyse Moléculaire, Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), UMR CNRS 8182, bât. 420, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - José Giner Planas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Isabelle Thomas
- Clermont Université, ENSCCF, EA 987, LCHG, BP 10448, F-63000 Clermont-Ferrand, Ensemble scientifique des Cézeaux, 24, Avenue des Landais, BP10187, 63174 Aubière Cedex, France
| | - Jean-Philippe Roblin
- Clermont Université, ENSCCF, EA 987, LCHG, BP 10448, F-63000 Clermont-Ferrand, Ensemble scientifique des Cézeaux, 24, Avenue des Landais, BP10187, 63174 Aubière Cedex, France
| | - Yves Troin
- Clermont Université, ENSCCF, EA 987, LCHG, BP 10448, F-63000 Clermont-Ferrand, Ensemble scientifique des Cézeaux, 24, Avenue des Landais, BP10187, 63174 Aubière Cedex, France
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22
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Pandey S, Das PP, Singh AK, Mukherjee R. Cobalt(ii), nickel(ii) and copper(ii) complexes of a hexadentate pyridine amide ligand. Effect of donor atom (ether vs. thioether) on coordination geometry, spin-state of cobalt and MIII–MII redox potential. Dalton Trans 2011; 40:10758-68. [DOI: 10.1039/c1dt10661a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Structural, magnetic and spectroscopic characterization of two unusual end-on bis(μ-acetato/μ-nitrato) bridged copper(II) complexes with N′-[phenyl(pyridin-2-yl)methylidene]furan-2-carbohydrazide and (2E,4Z)-N,2-dimethylhepta-2,4,6-trienamide-1-phenyl-1-pyridin-2-ylmethanimine (1:1) as capping ligands. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.07.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Sharma AK, Biswas S, Barman SK, Mukherjee R. Azo-containing pyridine amide ligand. A six-coordinate nickel(II) complex and its one-electron oxidized species: Structure and properties. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Weng ZH, Chen ZL, Liang FP. Synthesis and structures of three heterobimetallic compounds based on a new ferrocenyl pyridine ligand. J COORD CHEM 2010. [DOI: 10.1080/00958970802715934] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Zhe-Hui Weng
- a College of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P.R.China
- b College of Chemistry and Chemical Engineering, Guangxi Normal University , Guilin 541004, P.R.China
| | - Zi-Lu Chen
- b College of Chemistry and Chemical Engineering, Guangxi Normal University , Guilin 541004, P.R.China
| | - Fu-Pei Liang
- b College of Chemistry and Chemical Engineering, Guangxi Normal University , Guilin 541004, P.R.China
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26
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Jacob W, Mishra H, Pandey S, Lloret F, Mukherjee R. Six-coordinate CoIII and four-coordinate MII (M = Co, Zn) mixed-valence dimers supported by a deprotonated pyridine amide ligand: magnetism of a CoIIICoII complex and C–H⋯O/Cl/Br interactions. NEW J CHEM 2009. [DOI: 10.1039/b814303j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Singh AK, Jacob W, Boudalis AK, Tuchagues JP, Mukherjee R. A Tetragonal Core with Asymmetric Iron Environments Supported Solely by Bis(μ-OH){μ-(O–H···O)} Bridging and Terminal Pyridine Amide (N, O) Coordination: A New Member of the Tetrairon(III) Family. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800032] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Singh AK, Mukherjee R. Cobalt(ii) and cobalt(iii) complexes of thioether-containing hexadentate pyrazine amide ligands: C–S bond cleavage and cyclometallation reaction. Dalton Trans 2008:260-70. [DOI: 10.1039/b709901k] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Singh J, Hundal G, Corbella M, Gupta R. Synthesis, characterization and structures of copper(II) complexes with amide-based ligands: Unusual formation of a linear trimer and a zig-zag chain and their contrast magnetic behaviour. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.04.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Yang L, Powell DR, Houser RP. Structural variation in copper(I) complexes with pyridylmethylamide ligands: structural analysis with a new four-coordinate geometry index, tau4. Dalton Trans 2007:955-64. [PMID: 17308676 DOI: 10.1039/b617136b] [Citation(s) in RCA: 2236] [Impact Index Per Article: 131.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four Cu(I) complexes were synthesized with a family of pyridylmethylamide ligands, HL(R) [HL(R) = N-(2-pyridylmethyl)acetamide, R = null; 2,2-dimethyl-N-(2-pyridylmethyl)propionamide, R = Me(3); 2,2,2-triphenyl-N-(2-pyridylmethyl)acetamide, R = Ph(3))]. Complexes 1-3 were synthesized from the respective ligand and [Cu(CH(3)CN)(4)]PF(6) in a 2 : 1 molar ratio: [Cu(HL)(2)]PF(6) (1), [Cu(2)(HL(Me3))(4)](PF(6))(2) (2), [Cu(HL(Ph3))(2)]PF(6) (3). Complex 4, [Cu(HL)(CH(3)CN)(PPh(3))]PF(6), was synthesized from the reaction of HL with [Cu(CH(3)CN)(4)]PF(6) and PPh(3) in a 1 : 1 : 1 molar ratio. X-Ray crystal structures reveal that complexes 1, 3 and 4 are mononuclear Cu(I) species, while complex 2 is a Cu(I) dimer. The copper ions are four-coordinate with geometries ranging from distorted tetrahedral to seesaw in 1, 2, and 4. Complexes 1 and 2 are very air sensitive and they display similar electrochemical properties. The coordination geometry of complex 3 is nearly linear, two-coordinate. Complex 3 is exceptionally stable with respect to oxidation in the air, and its cyclic voltammetry shows no oxidation wave in the range of 0-1.5 V. The unusual inertness of complex 3 towards oxidation is attributed to the protection from bulky triphenyl substituent of the HL(Ph3) ligand. A new geometric parameter for four-coordinate compounds, tau(4), is proposed as an improved, simple metric for quantitatively evaluating the geometry of four-coordinate complexes and compounds.
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Affiliation(s)
- Lei Yang
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA
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31
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Abstract
Copper(I) chloro complexes were synthesized with a family of ligands, HL(R) [HL(R) = N-(2-pyridylmethyl)acetamide, R = null; 2-phenyl-N-(2-pyridylmethyl)acetamide, R = Ph; 2,2-dimethyl-N-(2-pyridylmethyl)propionamide, R = Me3; 2,2,2-triphenyl-N-(2-pyridylmethyl)acetamide, R = Ph3)]. Five complexes were synthesized from the respective ligand and cuprous chloride: [Cu(HL)Cl]n (1), [Cu2(HL)4Cl2] (2), [Cu2(HL(Ph))2(CH3CN)2Cl2] (3), [Cu2(HL(Ph)3)2Cl2] (4), and [Cu(HL(Me)3)2Cl] (5). X-ray crystal structures reveal that for all complexes the ligands coordinate to the Cu in a monodentate fashion, and inter- or intramolecular hydrogen-bonding interactions formed between the amide NH group and either amide C=O or chloro groups stabilize these complexes in the solid state and strongly influence the structures formed. Complexes 1-5 display a range of structural motifs, depending on the size of the ligand substituent groups, hydrogen bonding, and the stoichiometry of the starting materials, including a one-dimensional coordination polymer chain (1) and binuclear (2-4) or mononuclear (5) structures.
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Affiliation(s)
- Lei Yang
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019, USA
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32
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Gao DZ, Li FH, Xu XH, Zhu SR, Lin HK. A novel dimeric zinc(II) complex with a tripodal peptide ligand: a structure stabilized by ligand sharing. J COORD CHEM 2006. [DOI: 10.1080/00958970410001721358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Dong-Zhao Gao
- a Department of Chemistry , Nankai University , Tianjin 300071, P.R. China
| | - Feng-Hua Li
- a Department of Chemistry , Nankai University , Tianjin 300071, P.R. China
| | - Xin-He Xu
- a Department of Chemistry , Nankai University , Tianjin 300071, P.R. China
| | - Shou-Rong Zhu
- a Department of Chemistry , Nankai University , Tianjin 300071, P.R. China
| | - Hua-Kuan Lin
- a Department of Chemistry , Nankai University , Tianjin 300071, P.R. China
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33
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The Unusual Thermodynamic Stability Order of the First-series Transition Metal Complexes with N,N,N′-tri(2-pyridylmethyl)glycinamide and the Crystal Structure of the Nickel(II) Complex. TRANSIT METAL CHEM 2005. [DOI: 10.1007/s11243-005-6284-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Gérard C, Mohamadou A, Marrot J, Brandes S, Tabard A. Synthesis and Characterization of Copper Complexes Containing the Tripodal N7 Ligand Tris{2-[(pyridin-2-ylmethyl)amino]ethyl}amine (=N′-(Pyridin-2-ylmethyl)-N,N-bis{2-[(pyridin-2-ylmethyl)amino]ethyl}ethane-1,2-diamine): Equilibrium, Spectroscopic Data, and Crystal Structures of Mono- and Trinuclear Copper(II) Complexes. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590176] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Klingele née Hausmann J, Moubaraki B, Murray KS, Boas JF, Brooker S. Dinuclear Copper(II) Complexes of Two Homologous Pyrazine-Based Bis(terdentate) Diamide Ligands. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400908] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Sarkar S, Mondal A, Ribas J, Drew M, Pramanik K, Rajak KK. Mono, di and polynuclear Cu(II)–azido complexes incorporating N,N,N reduced schiff base: syntheses, structure and magnetic behavior. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.09.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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37
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Kumar Singh A, Mukherjee R. Structure and properties of bivalent nickel and copper complexes with pyrazine-amide-thioether coordination: stabilization of trivalent nickel. Dalton Trans 2005:2886-91. [PMID: 16094477 DOI: 10.1039/b504893a] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Acyclic pyrazine-2-carboxamide and thioether containing hexadentate ligand 1,4-bis[o-(pyrazine-2-carboxamidophenyl)]-1,4-dithiobutane (H(2)bpzctb), in its deprotonated form, has afforded light brown [Ni(II)(bpzctb)](1)(S=1) and green [Cu(II)(bpzctb)](2)(S=1/2) complexes. The crystal structures of 1.CH(3)OH and 2.CH(2)Cl(2) revealed that in these complexes the ligand coordinates in a hexadentate mode, affording examples of distorted octahedral M(II)N(2)(pyrazine)N'(2)(amide)S(2)(thioether) coordination. Each complex exhibits in CH(2)Cl(2) a reversible to quasireversible cyclic voltammetric response, corresponding to the Ni(III)/Ni(II)(1) and Cu(II)/Cu(I)(2) redox process. The E(1/2) values reveal that the complexes of bpzctb(2-) are uniformly more anodic by approximately 0.2 V than those of the corresponding complexes with the analogous pyridine ligand, 1,4-bis[o-(pyridine-2-carboxamidophenyl)]-1,4-dithiobutane (H(2)bpctb), attesting that compared to pyridine, pyrazine is a better stabilizer of the Ni(ii) or Cu(i) state. Coulometric oxidation of the previously reported complex [Ni(II)(bpctb)] and 1 generates [Ni(III)(bpctb)](+) and [Ni(III)(bpzctb)](+) species, which exhibit a LMCT transition in the 470--480 nm region and axial EPR spectra corresponding to a tetragonally elongated octahedral geometry. Complex 2 exhibits EPR spectra characteristic of the d(z(2)) ground state.
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Affiliation(s)
- Akhilesh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
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38
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Synthesis, Structure and Properties of a Mononuclear and an End-On Double Azido-Bridged Copper(II) Complex Incorporating an N,N,N,O-Coordinating Tripodal Ligand. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200400493] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Niklas N, Heinemann FW, Hampel F, Clark T, Alsfasser R. The Activation of Tertiary Carboxamides in Metal Complexes: An Experimental and Theoretical Study on the Methanolysis of Acylated Bispicolylamine Copper(II) Complexes. Inorg Chem 2004; 43:4663-73. [PMID: 15257595 DOI: 10.1021/ic0496774] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is a well-established concept that the C-N bond cleavage of carboxamide functions is facilitated by the coordination of a metal ion to the carbonyl oxygen atom. In contrast, the alternative C-N bond activation by coordination of a neutral tertiary carboxamide nitrogen atom has not been studied. We present the first results on the effect of nitrogen pyramidalization in N-coordinated metal complexes on the methanolysis of tertiary carboxamide groups. An analysis of the reactions products obtained from the methanol cleavage of [(N-Acyl-bpa)Cu]2+ (bpa = N,N-bispicolylamine) complexes is presented together with experimental and high-level theoretically calculated structures. The strong effect of different anions on the amide pyramidalization and subsequent C-N-bond cleavage is evaluated. We show that dichloro complexes [(N-Acyl-bpa)CuCl2] have much less activated amide groups than the corresponding triflate species. They should therefore be less reactive. However, [(N-Acyl-bpa)CuCl2] complexes dissociate in solution to give cationic monochloro complexes [(N-Acyl-bpa)Cu(S)Cl]+ (S = solvent molecule). Theoretical calculations show that the amide pyramidalization in the monochloro complexes is equal to that in the corresponding CF3SO3- salts. Consequently, chloro and triflato complexes are cleaved with similar rates and efficiencies. Parallels to and differences in the reactivity of purely organic distorted amides are discussed.
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Affiliation(s)
- Nicole Niklas
- Institute of Inorganic Chemistry, University of Erlangen-Nürnberg, Egerlandstr. 1, D-91058 Erlangen, Germany
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40
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Structural Snapshots of a Dynamic Coordination Sphere in Model Complexes for Catechol 1,2-Dioxygenases. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300420] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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41
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Copper(II) and nickel(II) complexes of pyridylamido hexadentate ligands: chemical speciation and spectroscopic studies. INORG CHEM COMMUN 2003. [DOI: 10.1016/s1387-7003(03)00139-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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42
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Guo YM, Du M, Wang GC, Bu XH. Structural and spectral studies of some coordination complexes of a phenol-functionalized diazamesocyclic ligand 1,4-bis-(3-tert-butyl-5-methyl-2-hydroxybenzyl)-1,4-diazacycloheptane (H2L). J Mol Struct 2002. [DOI: 10.1016/s0022-2860(02)00405-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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Rowland JM, Olmstead MM, Mascharak PK. Unusual reactivity of methylene group adjacent to pyridine-2-carboxamido moiety in iron(III) and cobalt(III) complexes. Inorg Chem 2002; 41:2754-60. [PMID: 12005500 DOI: 10.1021/ic011197e] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Fe(III) and Co(III) complexes of the ligand N-(2-picolyl)picolinamide (pmpH; H represents the dissociable amide hydrogen), namely, [Fe(pmp)(2)]BF(4) (1) and [Co(pmp)(2)]ClO(4) (2), have been synthesized and structurally characterized. The [bond]CH(2)[bond] moiety of pmp(-) in [M(pmp)(2)](+) (M = Fe, Co) is very reactive and is readily converted to carbonyl (C[double bond]O) group upon exposure to dioxygen. Such conversion results in [M(bpca)(2)]ClO(4) complexes (M = Fe (3), Co (5); bpcaH = bis(2-pyridylcarbonyl)amine) which have been characterized by spectroscopy and X-ray diffraction. The structure of 5 is reported here for the first time. The reactivity of the [bond]CH(2)[bond] moiety of pmp(-) has so far precluded the isolation of 1 although other metal complexes of pmp(-) have been reported years ago. The CH(2) --> C[double bond]O transformation arises from the tendency of the coordinated pmp(-) ligand to achieve further conjugation in the ligand framework and provides a better way to synthesize the metal complexes of bpcaH ligand. Reaction of 3 with NaH affords Fe(II) complex [Fe(bpca)(2)] (4) without any reduction of the ligand frame.
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Affiliation(s)
- John M Rowland
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, USA
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45
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Rowland JM, Olmstead MM, Mascharak PK. Synthesis, structure and properties of bis[N,N-bis(2-pyridylmethyl)amine-N-ethyl-2-pyridine-2-carboxamidecopper(II)] perchlorate. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(01)00798-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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46
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Rowland JM, Olmstead MM, Mascharak PK. Chiral monomeric and homochiral dimeric copper(II) complexes of a new chiral ligand, N-(1,2-bis(2-pyridyl)ethyl)pyridine-2-carboxamide: an example of molecular self-recognition. Inorg Chem 2002; 41:1545-9. [PMID: 11896723 DOI: 10.1021/ic0109905] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of Cu(ClO(4))(2) x 6H(2)O with a racemic mixture of the novel chiral ligand N-(1,2-bis(2-pyridyl)ethyl)pyridine-2-carboxamide (PEAH) affords only the homochiral dimeric copper(II) complexes [Cu(2)((R)()PEA)(2)](ClO(4))(2) and [Cu(2)((S)()PEA)(2)](ClO(4))(2) in a 1:1 ratio. The phenomenon of molecular self-recognition is also observed when a racemic mixture of the monomeric copper(II) complex [Cu((R(S))()PEA)(Cl)(H(2)O)] is converted into the homochiral dimeric species [Cu(2)((R(S))()PEA)(2)](ClO(4))(2) via reaction with Ag(+) ion. This is the first report of direct conversion of a racemic mixture of a chiral monomeric copper(II) complex to a mixture of the homochiral dimers.
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Affiliation(s)
- John M Rowland
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, USA
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47
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Jubert C, Mohamadou A, Gérard C, Brandes S, Tabard A, Barbier JP. Equilibrium and structural studies of complexes with a hexadentate ligand containing amide, amine and pyridyl nitrogen donors. Crystal structures of copper(ii), nickel(ii) and cobalt(iii) complexes. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b111614b] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Foxon S, Walter O, Schindler S. Syntheses and Characterization of Copper(II) Complexes of the New LigandsN-[(2-Pyridyl)methyl]-2,2′-dipyridylamine andN-[Bis(2-pyridyl)methyl]-2-pyridylamine. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(20021)2002:1<111::aid-ejic111>3.0.co;2-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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