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Hsieh CC, Liao PK, Chen CW, Chiang MH, Horng YC. The effect of anions in the synthesis and structure of pyrazolylamidino copper(II) complexes. Dalton Trans 2023; 52:4429-4441. [PMID: 36916977 DOI: 10.1039/d3dt00103b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Six new pyrazolylamidino Cu(II) complexes are synthesized directly from the reactions of Cu(X)2 salts (X = ClO4-, BF4-, or Cl-) and pyrazole (pzH) in nitrile solution (RCN, R = Me or Et) at 298 K via the metal-mediated coupling of RCN with pzH: [Cu(HNC(R)pz)2(X)2] (X = ClO4- or BF4-, R = Me, 1 or 7 and Et, 2 or 8, respectively) and dichloro Cu(II) complexes [Cu2Cl2(μ-Cl)2(HNC(Me)pz)2] (3) and [CuCl2(HNC(Et)pz)] (4). Four more new complexes, [Cu2(μ-Cl)2(HNC(Me)pz)2(pzH)2][X]2 (X = ClO4-, 5 and BF4-, 9) and [Cu2(μ-Cl)2(HNC(Et)pz)2(pzH)2(X)2] (X = ClO4-, 6 and BF4-, 10), are obtained indirectly from the anion substitution reaction with Cl- ions in 1 and 7, and 2 and 8, respectively. All complexes are characterized by EA, FTIR, UV-vis and EPR spectroscopy and X-ray crystallographic analyses. HNC(Et)pz or pzH is unobserved in both the nitrile-exchange reaction of 2 to d6-1 and the anion-substitution reaction of 2 to d6-5 in the CD3CN solution. The 1H NMR results reveal that the pzH-RCN coupling is intramolecular and reversible on a Cu(II) center. The crystal structures of these complexes show diverse supramolecular assemblies through imino NH⋯anion hydrogen bonds and pyrazolylamidino pz-pz (π⋯π) and pz-Cu(II) (π⋯metal) interactions. EPR results suggest weak magnetic couplings between Cu(II) centers in the polynuclear Cu(II) complexes. The yield and rate of the formation of 1 are higher in the reaction of Cu(ClO4)2 with a 4-fold molar excess of pzH compared with a 2-fold excess, indicating that [Cu(pzH)4]2+ is the more active species for pzH-RCN coupling. The highest rate for the formation of 1 is achieved when [Cu(pzH)4(ClO4)2] is used in MeCN solution. Thus, a plausible synthetic path for synthesizing pyrazolylamidino Cu(II) complexes is established. An intermediate species, [Cu(HNC(Me)pz)2(pzH)2][ClO4]2 (1a), is proposed for the synthetic process based on spectroscopic studies and DFT calculations. The reaction of [Cu(pzH)4X2] (X = ClO4-, Cl-, NO3-, or BF4-) in MeCN solution suggests that the lability of coordinated anions upon nitrile substitution affects the rate of the formation of bis-pyrazolylamidino Cu(II) complexes.
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Affiliation(s)
| | - Po-Kuang Liao
- Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan.
| | - Chia-Wei Chen
- Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan.
| | - Ming-Hsi Chiang
- Institute of Chemistry, Academia Sinica, Taipei 11528, Taiwan.,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yih-Chern Horng
- Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan.
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Molčanov L, Šenjug P, Barišić D, Pajić D, Molčanov K, Jurić M. Oxalate-based [Cu IICr III] coordination compounds affected by the tridentate ligand, simple anion, and reactant ratio: structural and magnetic features. Dalton Trans 2022; 51:16292-16306. [DOI: 10.1039/d2dt01949c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In addition to the influence of terpyridine, those of the simple ion and reactant ratio on the nature of the bridge and the overall structure of seven novel oxalate-based [CuIICrIII] compounds reflecting magnetic properties were investigated.
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Affiliation(s)
- Lidija Molčanov
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Pavla Šenjug
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička cesta 32, 10000 Zagreb, Croatia
| | - Dario Barišić
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička cesta 32, 10000 Zagreb, Croatia
| | - Damir Pajić
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička cesta 32, 10000 Zagreb, Croatia
| | | | - Marijana Jurić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
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3
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Polymeric chain complexes of copper(II) chloride with 1,5-disubstituted tetrazoles: Structure and magnetic properties. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114907] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Structural and chromotropism properties of copper(II) complexes containing a tridentate ligand. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01228-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Simões TRG, Marinho MV, Pasán J, Stumpf HO, Moliner N, Lloret F, Julve M. On the magneto-structural role of the coordinating anion in oxamato-bridged copper(ii) derivatives. Dalton Trans 2019; 48:10260-10274. [DOI: 10.1039/c9dt01277j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Herein we present the self-assembly of the [Cu(opba)]2− and [Cu(dmphen)]2+ building blocks in the presence of thiocyanate (1), chloride (2), bromide (3) and dicyanamide (4) anions.
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Affiliation(s)
- Tatiana R. G. Simões
- Departamento de Química
- Universidade Federal do Paraná
- Centro Politécnico
- Curitiba-PR
- Brazil
| | | | - Jorge Pasán
- Laboratorio de Rayos X y Materiales Moleculares (MATMOL)
- Departamento de Física
- Facultad de Ciencias (Sección Física)
- Universidad de La Laguna
- Edifício de Física y Matemáticas
| | - Humberto O. Stumpf
- Departamento de Química
- ICEX
- Universidade Federal de Minas Gerais
- BeloHorizonte
- Brazil
| | - Nicolás Moliner
- Departament de Química Inorgànica/Instituto de Ciencia Molecular
- Facultat de Química de la Universitat de València
- 46980-Paterna
- Spain
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular
- Facultat de Química de la Universitat de València
- 46980-Paterna
- Spain
| | - Miguel Julve
- Departament de Química Inorgànica/Instituto de Ciencia Molecular
- Facultat de Química de la Universitat de València
- 46980-Paterna
- Spain
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Buvaylo EA, Kokozay VN, Makhankova VG, Melnyk AK, Korabik M, Witwicki M, Skelton BW, Vassilyeva OY. Synthesis, Characterization, and Magnetic Properties of a Series of Copper(II) Chloride Complexes of Pyridyliminebenzoic Acids. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701391] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elena A. Buvaylo
- Department of Chemistry Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. 01601 Kyiv Ukraine
| | - Vladimir N. Kokozay
- Department of Chemistry Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. 01601 Kyiv Ukraine
| | - Valeriya G. Makhankova
- Department of Chemistry Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. 01601 Kyiv Ukraine
| | - Andrii K. Melnyk
- Institute for Sorption and Problems of Endoecology The National Academy of Sciences of Ukraine 13 Generala Naumova str. 03164 Kyiv Ukraine
| | - Maria Korabik
- Faculty of Chemistry University of Wroclaw F. Joliot‐Curie 14 50‐383 Wroclaw Poland
| | - Maciej Witwicki
- Faculty of Chemistry University of Wroclaw F. Joliot‐Curie 14 50‐383 Wroclaw Poland
| | - Brian W. Skelton
- School of Molecular Sciences, M310 University of Western Australia 6009 Perth WA Australia
| | - Olga Yu. Vassilyeva
- Department of Chemistry Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. 01601 Kyiv Ukraine
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Golchoubian H, Nateghi S. Chromotropism in halo-bridged dimers. Structural characterization of bis(μ-halo)bis(halo N-(pyridin-2-ylmethyl)cyclohexanamine copper(II)). J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1227972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Samira Nateghi
- Department of Chemistry, University of Mazandaran, Babol-sar, Iran
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Mono- and Di-chloro-bridged Discrete Dimers and Trimers and Mono-Chloro-Bridged 1D-Coordination Polymer of Copper(II). Magneto-structural Studies. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400005] [Citation(s) in RCA: 18] [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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Pal S, Jana PP, Nayek HP. Mononuclear complexes and a coordination polymer of the 2-pyridylamino (NH2Py) functionalized P(v) ligand. RSC Adv 2014. [DOI: 10.1039/c4ra02258k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Landee CP, Turnbull MM. Recent Developments in Low-Dimensional Copper(II) Molecular Magnets. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300133] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Albada GAV, Horst MGVD, Teat SJ, Gamez P, Roubeau O, Mutikainen I, Turpeinen U, Reedijk J. Polynuclear Cu(II), Ni(II) and Cd(II) coordination compounds with bis(pyrimidin-2-yl)amine and dicyanamide. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Alves WA, Matos IO, Takahashi PM, Bastos EL, Martinho H, Ferreira JG, Silva CC, de Almeida Santos RH, Paduan-Filho A, Da Costa Ferreira AM. A Chloro-Bridged Linear Chain Imine-Copper(II) Complex and Its Application as an Enzyme-Free Amperometric Biosensor for Hydrogen Peroxide. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200801218] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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An alternating chain consisting of dinuclear Cu(II) ions bridged by end-on bis(μ-dicyanamido-κN1,N5) ligands and hydrogen-bonded pairs of bis(pyrimidin-2-yl)amines, with unusually long Cu⋯Cu distances of 7.20 and 9.99Å: Synthesis, structure and magnetic properties of [Cu(dipm)(μ-dca)(H2O)(ClO4)]2·2EtOH. INORG CHEM COMMUN 2007. [DOI: 10.1016/j.inoche.2007.05.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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van Albada GA, Dominicus I, Mutikainen I, Turpeinen U, Reedijk J. Synthesis, X-ray crystal structures, spectroscopic properties and magnetism of copper(II) compounds of formula trans-Cu(LL)2(anion)2, with N-(pyridin-2-yl)acetamide and N-(pyrimidin-2-yl)acetamide as ligands: Unexpected absence of hydrogen bonding to the non-coordinating nitrogen atom of the ligand. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.04.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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van Albada GA, Mutikainen I, Turpeinen U, Reedijk J. An unusual Cu(II) polymeric compound with tridentate dehydronated and bidentate neutral ligand bis(pyrimidin-2-yl)amine (=Hdipm) and uncoordinated Hdipm in a complicated H-bonding system. Synthesis, characterization and X-ray structure of {[Cu(dipm)(Hdipm)](Hdipm)(CF3SO3)(C2H5OH)(H2O)}n. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2006.09.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bolm C, Martin M, Gescheidt G, Palivan C, Stanoeva T, Bertagnolli H, Feth M, Schweiger A, Mitrikas G, Harmer J. Mechanistic Insights into Stereoselective Catalysis—The Effects of Counterions in a CuII–Bissulfoximine-Catalyzed Diels–Alder Reaction. Chemistry 2007; 13:1842-50. [PMID: 17115464 DOI: 10.1002/chem.200601086] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The initial steps of an enantioselective Diels-Alder reaction catalyzed by a CuII-bissulfoximine complex were followed by EXAFS (EXAFS=extended X-ray absorption fine structure), EPR (EPR=electron paramagnetic resonance) spectroscopy (CW-EPR, FID-detected EPR, pulse ENDOR, HYSCORE; CW=continuous wave; ENDOR=electron nuclear double resonance; HYSCORE=hyperfine sublevel correlation; FID=free induction decay), and UV-visible spectroscopy. The complexes formed between the parent CuX2 (X=Cl-, Br-, TfO-, SbF6-) salts, the chiral bissulfoximine ligand (S,S)-1, and N-(1-oxoprop-2-en-1-yl)oxazolidin-2-one (2) as the substrate in CH2Cl2 were investigated in frozen and fluid solution. In all cases, penta- or hexacoordinated CuII centers were established. The complexes with counterions indicating high stereoselectivity (TfO- and SbF6-) reveal one unique species in which substrate 2 binds to pseudoequatorial positions (via O atoms), shifting the counterions to axial locations. On the other hand, those lacking stereoselectivity (X=Cl- and Br-) form two species in which the parent halogen anions remain at equatorial positions preventing the formation of geometries compatible with those found for X=TfO- and SbF6-.
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Affiliation(s)
- Carsten Bolm
- Institut für Organische Chemie der RWTH Aachen, Landoltweg 1, 52056 Aachen, Germany.
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van Albada GA, Mutikainen I, Turpeinen U, Reedijk J. Intermolecular Watson–Crick-like ligand pairing in two Cu(II) compounds with the ligand bis(pyrimidin-2-yl)amine forming 2D chain-type compounds. INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.06.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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