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Selvakumaran B, Murali M, Shanmugavadivel S, Sindhuja V, Sathya V. Impressive promiscuous biomimetic models of ascorbate, amine, and catechol oxidases. J Inorg Biochem 2024; 259:112671. [PMID: 39059176 DOI: 10.1016/j.jinorgbio.2024.112671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 07/14/2024] [Accepted: 07/21/2024] [Indexed: 07/28/2024]
Abstract
Copper metalloenzymes ascorbate oxidase (AOase), amine oxidase (AmOase), and catechol oxidase (COase) possess copper(II) sites of coordination, which are trimeric, homodimeric, and dimeric, respectively. Two newly mononuclear copper(II) complexes, namely, [Cu(L)(bpy)](ClO4) (1) and [Cu(L)(phen)](ClO4) (2) where HL = Schiff base, have been synthesized. UV-visible, EPR and single-crystal X-ray diffraction examinations were used to validate the geometry in solution and solid state. For complex 1, the metal exhibits a coordination sphere between square pyramidal and trigonal bipyramidal geometry (τ, 0.49). A positive CuII/I redox potential indicates a stable switching between CuII and CuI redox states. Despite the monomeric origin, both homogeneous catalysts (1 or 2) in MeOH were found to favor three distinct chemical transformations, namely, ascorbic acid (H2A) to dehydroascorbic acid (DA), benzylamine (Ph-CH2-NH2) to benzaldehyde (Ph-CHO), and 3,5-di-tert-butylcatechol (3,5-DTBC) to 3,5-di-tert-butylquinone (3,5-DTBQ) [kcat: AOase, 9.6 (1) or 2.0 × 106 h-1(2); AmOase, 13.4 (1) or 9.4 × 106 h-1 (2); COase, 2.0 (1) or 1.9 × 103 h-1 (2)]. They exhibit higher levels of AOase activity as indicated by their kcat values compared to the AOase enzyme. The kcat values for COase activity in buffer solution [5.93 (1) or 2.95 × 105 h-1 (2)] are one order lower than those of the enzymes. This is because of the labile nature of the coordinated donor, the flexibility of the ligand, the simplicity of the catalyst-substrate interaction, and the positive CuII/I redox potential. Interestingly, more efficient catalysis is promoted by 1 and 2 concerning that of other mono- and dicopper(II) complexes.
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Affiliation(s)
- Balasubramaniam Selvakumaran
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli 620 001, Tamil Nadu, India
| | - Mariappan Murali
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli 620 001, Tamil Nadu, India.
| | - Selvaraj Shanmugavadivel
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli 620 001, Tamil Nadu, India
| | - Venkatesan Sindhuja
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli 620 001, Tamil Nadu, India
| | - Velusamy Sathya
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli 620 001, Tamil Nadu, India
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Al-Salmi IK, Shongwe MS. Ternary Phenolate-Based Thiosemicarbazone Complexes of Copper(II): Magnetostructural Properties, Spectroscopic Features and Marked Selective Antiproliferative Activity against Cancer Cells. Molecules 2024; 29:431. [PMID: 38257344 PMCID: PMC10819714 DOI: 10.3390/molecules29020431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/06/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024] Open
Abstract
The new diprotic ligand 3,5-di-tert-butylsalicylaldehyde 4-ethyl-3-thiosemicarbazone, abbreviated H2(3,5-t-Bu2)-sal4eT, exists as the thio-keto tautomer and adopts the E-configuration with respect to the imine double bond, as evidenced by single-crystal X-ray analysis and corroborated by spectroscopic characterisation. Upon treatment with Cu(OAc)2·H2O in the presence of either 2,9-dimethyl-1,10-phenanthroline (2,9-Me2-phen) or 1,10-phenanthroline (phen) as a co-ligand in MeOH, this thiosemicarbazone undergoes conformational transformation (relative donor-atom orientations: syn,anti → syn,syn) concomitantly with tautomerisation and double deprotonation to afford the ternary copper(II) complexes [Cu{(3,5-t-Bu2)-sal4eT}(2,9-Me2-phen)] (1) and [Cu2{3,5-t-Bu2)-sal4eT}2(phen)] (2). Crystallographic elucidation has revealed that complex 1 is a centrosymmetric dimer of mononuclear copper(II) complex molecules brought about by intermolecular H-bonding. The coordination geometry at the copper(II) centre is best described as distorted square pyramidal in accordance with the trigonality index (τ = 0.14). The co-ligand adopts an axial-equatorial coordination mode; hence, there is a disparity between its two Cu-N coordinate bonds arising from weakening of the apical one as a consequence of the tetragonal distortion. The axial X-band ESR spectrum of complex 1 is consistent with retention of this structure in solution. Complex 2 is a centrosymmetric dimer of dinuclear copper(II) complex molecules exhibiting intermolecular H-bonding and π-π-stacking interactions. The two copper(II) centres, which are 4.8067(18) Å apart and bridged by the thio-enolate nitrogen of the quadridentate thiosemicarbazonate ligand, display two different coordination geometries, one distorted square planar (τ4 = 0.082) and the other distorted square pyramidal (τ5 = 0.33). Such dinuclear copper(II) thiosemicarbazone complexes, which are crystallographically characterised, are extremely rare. In vitro, complexes 1 and 2 outperform cisplatin as antiproliferative agents in terms of potency and selectivity towards HeLa and MCF-7 cancer cell lines.
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Affiliation(s)
| | - Musa S. Shongwe
- Department of Chemistry, College of Science, Sultan Qaboos University, P.O. Box 36, Al-Khod 123, Muscat, Oman
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Murali M, Sathya V, Selvakumaran B. Fate of model complexes with monocopper center towards the functional properties of type 2 and type 3 copper oxidases. J Biol Inorg Chem 2021; 26:67-79. [PMID: 33409586 DOI: 10.1007/s00775-020-01837-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 11/22/2020] [Indexed: 12/27/2022]
Abstract
Green colored mononuclear copper(II) complexes viz. [Cu(L)(bpy)](ClO4) (1) or [Cu(L)(phen)](ClO4) (2) (where H(L) is 2-((2-dimethylamino)ethyliminomethyl)naphthol) show distorted square pyramidal (4 + 1) geometry with CuN4O chromophore. The existence of self-assembled molecular associations indicates the formation of the dimer. Dimeric nature in solution is retained due to the binding of the substrate, encourages steric match between substrate and Cu(II) active site, which favors electron transfer. Interestingly, both the complexes exhibit high-positive redox potential. Therefore, the presence of self-assembled molecular association along with the positive redox potential enhances the catalytic oxidation of ascorbic acid to dehydroascorbic acid or benzylamine to benaldehyde or catechol to o-quinone thereby model the functional properties of type 2 and type 3 copper oxidases. Notably, catalytic activity is effective when compared with other reported mononuclear copper(II) complexes and even superior to many binuclear copper(II) complexes. Existence of self-assembled molecular association in solution along with high-positive redox potential favors electron transfer process in mononuclear copper(II) complexes and models the functional properties of type 2 and type 3 copper oxidases.
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Affiliation(s)
- Mariappan Murali
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli, Tamil Nadu, 620 001, India.
| | - Velusamy Sathya
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli, Tamil Nadu, 620 001, India
| | - Balasubramaniam Selvakumaran
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry, National College (Autonomous), Tiruchirappalli, Tamil Nadu, 620 001, India
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Easy coordinate geometry indexes, τ4 and τ5 and HSA study for unsymmetrical Pd(II), Fe(II), Zn(II), Mn(II), Cu(II) and VO(IV) complexes of a tetradentate ligand: Synthesis, characterization, properties, and antioxidant activities. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119434] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Lobana TS, Kaushal M, Virk RK, Garcia-Santos I, Jasinski JP. Thiosemicarbazonates of copper: Crystal structures of [(furan-2-acetaldehyde-N-phenyl-thiosemicarbazonato)][bis(triphenylphosphine)]copper(I) and [bis(furan-2-formaldehyde-N-phenyl-thiosemicarbazonato)]copper(II). Polyhedron 2018. [DOI: 10.1016/j.poly.2018.06.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Hydrothermal Synthesis, Structural Characterization, and Interaction Mechanism with DNA of Copper(II) Complex Containing 2,2'-Bipyridine. Bioinorg Chem Appl 2018; 2018:8459638. [PMID: 29951088 PMCID: PMC5987339 DOI: 10.1155/2018/8459638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 04/08/2018] [Indexed: 11/18/2022] Open
Abstract
A Cu(II) complex [Cu(bipy)(H2O)2(SO4)] n (bipy = 2,2'-bipyridine) was synthesized by hydrothermal method and characterized structurally by elemental analyses, single crystal X-ray diffraction, infrared spectra, and thermogravimetry and differential scanning calorimetry. The Cu(II) was hexacoordinated by two N atoms from bipy, two O atoms from different sulfate radical anions, and two O atoms from two water molecules, forming a slightly distorted octahedral geometry, and bridged by sulfato groups into polymeric chains. Under the condition of physiological pH, the interaction mechanism between the complex and hsDNA was explored with acridine orange as a fluorescence probe by spectroscopic methods. The binding modes between the complex and hsDNA were the electrostatic and embedded modes.
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Tom L, Aiswarya N, Sreejith S, Kurup MP. Self-organized three dimensional architectures based on non-covalent interactions in square planar Cu(II) thiosemicarbazone: Solvent mediated crystallization and EPR based correlation study. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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8
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Lobana TS, Indoria S, Sood H, Arora DS, Randhawa BS, Garcia-Santos I, Smolinski VA, Jasinski JP. Synthesis of 5-nitro-salicylaldehyde-N-substituted thiosemicarbazonates of copper(II): Molecular structures, spectroscopy, ESI-mass studies and antimicrobial activity. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.02.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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9
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SHARMA REKHA, LOBANA TARLOKS, KAUR MANVIR, THATHAI NEERAJ, HUNDAL GEETA, JASINSKI JERRYP, BUTCHER RAYJ. Variable coordinating activity of sulfur in silver(I) complexes with thiophene based N1-substituted thiosemicarbazones: First case of thiopheneyl-thione sulfur bridging in a dinuclear complex. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1097-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10
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Synthesis and structures of 5-methoxy-salicylaldehyde thiosemicarbazonates of copper(II): Molecular spectroscopy, ESI-mass studies and antimicrobial activity. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.12.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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11
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Indoria S, Lobana TS, Sood H, Arora DS, Hundal G, Jasinski JP. Synthesis, spectroscopy, structures and antimicrobial activity of mixed-ligand zinc(ii) complexes of 5-nitro-salicylaldehyde thiosemicarbazones. NEW J CHEM 2016. [DOI: 10.1039/c5nj02822a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc(ii)-thiosemicarbazone complexes have high antimicrobial activity against MRSA,S. aureus,K. pneumoniae,Sh. flexneri,S. typhimuriumandC. albicans.
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Affiliation(s)
- Shikha Indoria
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar – 143 005
- India
| | - Tarlok S. Lobana
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar – 143 005
- India
| | - Henna Sood
- Department of Microbiology
- Guru Nanak Dev University
- Amritsar-143 005
- India
| | - Daljit S. Arora
- Department of Microbiology
- Guru Nanak Dev University
- Amritsar-143 005
- India
| | - Geeta Hundal
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar – 143 005
- India
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Lobana TS, Indoria S, Kaur H, Arora DS, Jassal AK, Jasinski JP. Synthesis and structures of 5-nitro-salicylaldehyde thiosemicarb-azonates of copper(ii): molecular spectroscopy, ESI-mass studies, antimicrobial activity and cytotoxicity. RSC Adv 2015. [DOI: 10.1039/c4ra15006f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Salicylaldehyde thiosemicarbazonates of copper(ii) have shown significant growth inhibitory activity againstS. aureus, MRSA,K. pneumonia,S. flexneri,P. aeruginosaandC. albicansand are bactericidal in nature with low cytotoxicity.
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Affiliation(s)
- Tarlok S. Lobana
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143 005
- India
| | - Shikha Indoria
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143 005
- India
| | - Harpreet Kaur
- Department of Microbiology
- Guru Nanak Dev University
- Amritsar-143 005
- India
| | - Daljit S. Arora
- Department of Microbiology
- Guru Nanak Dev University
- Amritsar-143 005
- India
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13
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Lobana TS, Indoria S, Sharma M, Nandi J, Jassal AK, Hundal MS, Castineiras A. Synthesis, structure and spectroscopy of mono- and di-nuclear copper(I) complexes incorporating anionic thiophene based thiosemicarbazones-first examples. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Choudhary M, Patel R, Rawat S. Synthesis, structural characterization, superoxide dismutase and antimicrobial activities studies of copper (II) complexes with 2-(E)-(2-(2-aminoethylamino) methyl)-4-bromophenol and (19E, 27E)-N1, N2-bis (phenyl (pyridine-2-yl)-methylene)-ethane-1, 2-diamine as ligands. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.04.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Synthesis, structures, spectroscopy and antimicrobial properties of complexes of copper(II) with salicylaldehyde N-substituted thiosemicarbazones and 2,2′-bipyridine or 1,10-phenanthroline. Eur J Med Chem 2014; 76:145-54. [DOI: 10.1016/j.ejmech.2014.02.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 02/06/2014] [Accepted: 02/07/2014] [Indexed: 11/20/2022]
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16
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Choudhary M, Patel R, Rawat S. Synthesis, electrochemical, structural, spectroscopic and biological activities of mixed ligand copper (II) complexes with 2-{[(Z)-(5-bromo-2-hydroxyphenyl)methylidene]amino}benzoic acid and nitrogenous bases. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.12.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Puterová-Tokárová Z, Mrázová V, Boča R. Magnetism of novel Schiff-base copper(II) complexes derived from aminoacids. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Synthesis, X-ray structure and ascorbic oxidation properties of ternary α-amino acid Schiff base-bipy Cu(II) complexes as functional models for ascorbic oxidase. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.01.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nguyen DT, Le TH, Bui TTT. Antioxidant activities of thiosemicarbazones from substituted benzaldehydes and N-(tetra-O-acetyl-β-D-galactopyranosyl)thiosemicarbazide. Eur J Med Chem 2012; 60:199-207. [PMID: 23291121 DOI: 10.1016/j.ejmech.2012.10.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 10/01/2012] [Accepted: 10/04/2012] [Indexed: 11/19/2022]
Abstract
Reaction of N-(2,3,4,6-tetra-O-acetyl-β-d-galactopyranosyl)thiosemicarbazide and different substituted benzaldehydes gave some new substituted benzaldehyde N-(2,3,4,6-tetra-O-acetyl-β-d-galactopyranosyl)thiosemicarbazones. The reaction was performed using conventional and microwave-assisted heating methods. The structures of thiosemicarbazones were confirmed by spectroscopic (IR, (1)H NMR, (13)C NMR and ESI-MS) method. The antioxidant activity of these thiosemicarbazones was evaluated in vitro and in vivo, and it's shown that some of these compounds had significant antioxidant activity. Amongst the compounds screened for antioxidant activity, thiosemicarbazones 4a, 4b and 4c showed good antioxidant activity on DPPH. The compounds 4g, 4i, 4l caused significant elevation of SOD activity and 4e, 4g, 4i, 4l had higher catalase activity, and only compounds 4c and 4f expressed the GSH-Px activity.
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Affiliation(s)
- Dinh Thanh Nguyen
- Faculty of Chemistry, VNU University of Science, Ha Noi 10000, Viet Nam.
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Youssef NS, El-Seidy AM, Schiavoni M, Castano B, Ragaini F, Gallo E, Caselli A. Thiosemicarbazone copper complexes as competent catalysts for olefin cyclopropanations. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.03.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Lobana TS, Kumari P, Butcher RJ, Jasinski JP, Golen JA. Metal Derivatives of Thiosemicarbazones: Crystal and Molecular Structures of Mono- and Dinuclear Copper(II) Complexes with N1-Subsitituted Salicylaldehyde Thiosemicarbazones. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200180] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Study of copper(II) complexes of two diacetyl monooxime thiosemicarbazones: X-ray crystal structure and magneto-structural correlation of [Cu(dmoTSCH)Cl]2·H2O (dmoTSCH=monoanion of diacetyl monooxime thiosemicarbazone). Polyhedron 2012. [DOI: 10.1016/j.poly.2011.12.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Bon VV, Orysyk SI, Pekhnyo VI. [1-(2-Oxidobenzylidene)-4-phenylthiosemicarbazidato-κ 3O, N1, S](pyridine-κ N)copper(II). Acta Crystallogr Sect E Struct Rep Online 2010; 66:m676. [PMID: 21579316 PMCID: PMC2979479 DOI: 10.1107/s1600536810017381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Accepted: 05/11/2010] [Indexed: 11/10/2022]
Abstract
In the structure of the title compound, [Cu(C14H11N3OS)(C5H5N)], the CuII atom exhibits a slightly distorted square-planar CuN2OS coordination polyhedron consisting of a phenyl O, an azomethine N and a thioamide S atom from the tridentate thiosemicarbazonate dianion, and the N atom of a pyridine molecule. The thiosemicarbazonate ligand exists in the thiol tautomeric form as an E isomer. Rotational disorder of the pyridine and phenyl rings in a 1:1 ratio of the respective components is observed. An extensive network of weak N—H⋯S, C—H⋯O, C—H⋯N and C—H⋯S hydrogen-bonding interactions consolidates the structure.
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Lobana TS, Khanna S, Hundal G, Liaw BJ, Liu CW. The influence of substituents at the C2 carbon of thiosemicarbazones on bonding and nuclearity of silver(I) complexes. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.04.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Lobana TS, Bawa G, Butcher RJ. Synthesis of CuII−RuII−CuII Trinuclear Complexes via Redox Reaction of Copper(I) Across Thiosemicarbazones Coordinated to Ruthenium(II). Inorg Chem 2008; 47:1488-95. [DOI: 10.1021/ic701780g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tarlok S. Lobana
- Department of Chemistry, Guru Nanak Dev University, Amritsar – 143 005, and India
- Department of Chemistry, Howard University, Washington, D.C. 20059
| | - Gagandeep Bawa
- Department of Chemistry, Guru Nanak Dev University, Amritsar – 143 005, and India
- Department of Chemistry, Howard University, Washington, D.C. 20059
| | - Ray J. Butcher
- Department of Chemistry, Guru Nanak Dev University, Amritsar – 143 005, and India
- Department of Chemistry, Howard University, Washington, D.C. 20059
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26
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Ligational behavior of new mononucleating SNOO thiosemicarbazone ligands towards 3d metal(II) ions: synthesis and spectroscopic studies. TRANSIT METAL CHEM 2007. [DOI: 10.1007/s11243-007-9051-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Prabhakaran R, Huang R, Karvembu R, Jayabalakrishnan C, Natarajan K. Formation of unusual ruthenium(III) carbonyl complex through ONS tricoordination of salicylaldehyde-N-phenylthiosemicarbazone. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.07.083] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Kostas ID, Andreadaki FJ, Kovala-Demertzi D, Christos Prentjas, Demertzis MA. Suzuki–Miyaura cross-coupling reaction of aryl bromides and chlorides with phenylboronic acid under aerobic conditions catalyzed by palladium complexes with thiosemicarbazone ligands. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.02.003] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Model for type 2 Cu(II) oxidase: structure reactivity correlation studies on some mononuclear Cu(X–Salmeen)Im complexes, where X=H, Cl and Im=Imidazole: molecular association, electronic spectra and ascorbic oxidation. Polyhedron 2004. [DOI: 10.1016/j.poly.2004.08.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Thomas AM, Naik AD, Nethaji M, Chakravarty AR. Synthesis, crystal structure and photo-induced DNA cleavage activity of ternary copper(II)-thiosemicarbazone complexes having heterocyclic bases. Inorganica Chim Acta 2004. [DOI: 10.1016/j.ica.2004.01.031] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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