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Narwane M, Dorairaj DP, Chang YL, Karvembu R, Huang YH, Chang HW, Hsu SCN. Tris-(2-pyridyl)-pyrazolyl Borate Zinc(II) Complexes: Synthesis, DNA/Protein Binding and In Vitro Cytotoxicity Studies. Molecules 2021; 26:7341. [PMID: 34885924 PMCID: PMC8659194 DOI: 10.3390/molecules26237341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/29/2021] [Accepted: 12/01/2021] [Indexed: 11/16/2022] Open
Abstract
Zn(II) complexes bearing tris[3-(2-pyridyl)-pyrazolyl] borate (Tppy) ligand (1-3) was synthesized and examined by spectroscopic and analytical tools. Mononuclear [TppyZnCl] (1) has a Zn(II) centre with one arm (pyrazolyl-pyridyl) dangling outside the coordination sphere which is a novel finding in TppyZn(II) chemistry. In complex [TppyZn(H2O)][BF4] (2) hydrogen bonding interaction of aqua moiety stabilizes the dangling arm. In addition, solution state behaviour of complex 1 confirms the tridentate binding mode and reactivity studies show the exogenous axial substituents used to form the [TppyZnN3] (3). The complexes (1-3) were tested for their ability to bind with Calf thymus (CT) DNA and Bovine serum albumin (BSA) wherein they revealed to exhibit good binding constant values with both the biomolecules in the order of 104-105 M-1. The intercalative binding mode with CT DNA was confirmed from the UV-Visible absorption, viscosity, and ethidium bromide (EB) DNA displacement studies. Further, the complexes were tested for in vitro cytotoxic ability on four triple-negative breast cancer (TNBC) cell lines (MDA-MB-231, MDA-MB-468, HCC1937, and Hs 578T). All three complexes (1-3) exhibited good IC50 values (6.81 to 16.87 μM for 24 h as seen from the MTS assay) results which indicated that these complexes were found to be potential anticancer agents against the TNBC cells.
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Affiliation(s)
- Manmath Narwane
- Drug Development and Value Creation Research Centre, Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (M.N.); (D.P.D.); (Y.-L.C.)
| | - Dorothy Priyanka Dorairaj
- Drug Development and Value Creation Research Centre, Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (M.N.); (D.P.D.); (Y.-L.C.)
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India;
| | - Yu-Lun Chang
- Drug Development and Value Creation Research Centre, Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (M.N.); (D.P.D.); (Y.-L.C.)
| | - Ramasamy Karvembu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India;
| | - Yu-Han Huang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Hsueh-Wei Chang
- Department of Biomedical Science and Environment Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
| | - Sodio C. N. Hsu
- Drug Development and Value Creation Research Centre, Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (M.N.); (D.P.D.); (Y.-L.C.)
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
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2
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Mersal GAM, Hessien MM, Taleb MFA, Al-Juaid SS, Ibrahim MM. Solid–Liquid Phase Structural Studies of Bis(2-Picolyl)Amine-Based Zinc(II) Complexes as Functional Hydrolase Models: The Detoxification of Fenitrothion. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02105-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Ritz MD, Gerhard AC, Pike RD, Bebout DC. Synthesis, Solid State, Solution and ESI‐MS Studies of Zinc(II) Cluster Complexes with a Branched Mixed Donor Thiolate Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mikhaila D. Ritz
- Department of Chemistry William & Mary Williamsburg 23187–8795 VA USA
| | - Alison C. Gerhard
- Department of Chemistry William & Mary Williamsburg 23187–8795 VA USA
| | - Robert D. Pike
- Department of Chemistry William & Mary Williamsburg 23187–8795 VA USA
| | - Deborah C. Bebout
- Department of Chemistry William & Mary Williamsburg 23187–8795 VA USA
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Hydrolysis of NHC stabilized zinc diaryloxide [(NHC)Zn(OAr)2]: Impact of stoichiometric quantity of water and base. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mono- and Hexanuclear Zinc Halide Complexes with Soft Thiopyridazine Based Scorpionate Ligands. INORGANICS 2019. [DOI: 10.3390/inorganics7020024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Scorpionate ligands with three soft sulfur donor sites have become very important in coordination chemistry. Despite its ability to form highly electrophilic species, electron-deficient thiopyridazines have rarely been used, whereas the chemistry of electron-rich thioheterocycles has been explored rather intensively. Here, the unusual chemical behavior of a thiopyridazine (6-tert-butylpyridazine-3-thione, HtBuPn) based scorpionate ligand towards zinc is reported. Thus, the reaction of zinc halides with tris(6-tert-butyl-3-thiopyridazinyl)borate Na[TntBu] leads to the formation of discrete torus-shaped hexameric zinc complexes [TntBuZnX]6 (X = Br, I) with uncommonly long zinc halide bonds. In contrast, reaction of the sterically more demanding ligand K[TnMe,tBu] leads to decomposition, forming Zn(HPnMe,tBu)2X2 (X = Br, I). The latter can be prepared independently by reaction of the respective zinc halides and two equiv of HPnMe,tBu. The bromide compound was used as precursor which further reacts with K[TnMe,tBu] forming the mononuclear complex [TnMe,tBu]ZnBr(HPnMe,tBu). The molecular structures of all compounds were elucidated by single-crystal X-ray diffraction analysis. Characterization in solution was performed by means of 1H, 13C and DOSY NMR spectroscopy which revealed the hexameric constitution of [TntBuZnBr]6 to be predominant. In contrast, [TnMe,tBu]ZnBr(HPnMe,tBu) was found to be dynamic in solution.
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6
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Ibrahim MM, Ramadan AEMM, Shaban SY, Mersal GAM, Soliman MM, Al-Juaid S. Thione-Based Nickel(II) Complexes as Functional Antioxidant Mimics: Scavenging Activity of Reactive Oxygen Species O2
−· and X-Ray Crystal Structure of [Ni(Ttxyly)2]2 {Ttxylyl = Hydrotris(2-mercapto-1-xylyl-imidazolyl)borate}. J Inorg Organomet Polym Mater 2017. [DOI: 10.1007/s10904-017-0573-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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7
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Sun Cao P, Sommer RD, Grice KA. Structural comparison of suberanilohydroxamic acid (SAHA) and other zinc-enzyme inhibitors bound to a monomeric zinc species. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.01.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tüchler M, Holler S, Rendl S, Stock N, Belaj F, Mösch‐Zanetti NC. Zinc Scorpionate Complexes with a Hybrid (Thiopyridazinyl)(thiomethimidazolyl)borate Ligand. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501366] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michael Tüchler
- Institute of Chemistry Inorganic Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Stefan Holler
- Institute of Chemistry Inorganic Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Sarah Rendl
- Institute of Chemistry Inorganic Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Natascha Stock
- Institute of Chemistry Inorganic Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Ferdinand Belaj
- Institute of Chemistry Inorganic Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry Inorganic Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
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Zahim S, Wickramasinghe LA, Evano G, Jabin I, Schrock RR, Müller P. Calix[6]azacryptand Ligand with a Sterically Protected Tren-Based Coordination Site for Metal Ions. Org Lett 2016; 18:1570-3. [DOI: 10.1021/acs.orglett.6b00410] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sara Zahim
- Laboratoire
de Chimie Organique, Université Libre de Bruxelles (ULB), Av.
F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Lasantha A. Wickramasinghe
- Department
of Chemistry, Massachusetts Institute of Technology, 6-331, 77
Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Gwilherm Evano
- Laboratoire
de Chimie Organique, Université Libre de Bruxelles (ULB), Av.
F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Ivan Jabin
- Laboratoire
de Chimie Organique, Université Libre de Bruxelles (ULB), Av.
F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Richard R. Schrock
- Department
of Chemistry, Massachusetts Institute of Technology, 6-331, 77
Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Peter Müller
- Department
of Chemistry, Massachusetts Institute of Technology, 6-331, 77
Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Carrano CJ. A Family of Homo- and Heteroscorpionate Ligands: Applications to Bioinorganic Chemistry. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501476] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Carl J. Carrano
- Department of Chemistry and Biochemistry; San Diego State University; 92182-1030 San Diego CA USA
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11
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Yuan E, Han W, Zhang G, Zhao K, Mo Z, Lu G, Tang Z. Structural and Textural Characteristics of Zn-Containing ZSM-5 Zeolites and Application for the Selective Catalytic Reduction of NOx with NH3 at High Temperatures. CATALYSIS SURVEYS FROM ASIA 2016. [DOI: 10.1007/s10563-015-9205-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Structural zinc(II) thiolate complexes relevant to the modeling of Ada repair protein: Application toward alkylation reactions. ARAB J CHEM 2014. [DOI: 10.1016/j.arabjc.2010.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Ibrahim MM, Mersal GA, El-Shafai N, Youssef MM, Shokry H. Synthesis, spectroscopy, electrochemistry, and methylation reaction of the dithiolate-based cobalt(II) complex derived from tert-butyl N-(2-mercaptoethyl)carbamate. CR CHIM 2014. [DOI: 10.1016/j.crci.2013.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Ibrahim MM, Mersal GAM, El-Shafai N, Ramadan AMM, Youssef MM. Spectroscopic, electrochemical, and alkylation reactions: tert-butyl N-(2-mercaptoethyl)carbamate copper(II) and nickel(II) complexes as structural mimics for the active site of thiolate-alkylating enzymes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 120:574-584. [PMID: 24290356 DOI: 10.1016/j.saa.2013.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 09/27/2013] [Accepted: 10/02/2013] [Indexed: 06/02/2023]
Abstract
Two new dithiolate copper(II) and nickel(II) complexes with the ligand tert-butyl N-(2-mercaptoethyl)-carbamate (Boc-SH) were prepared. Their structures were established to be [(Boc-S)2M], where M=Cu (1) and Ni (2) by using elemental analysis, thermal analysis, molar conductivity, FT-IR, Raman, UV/VIS, and ESR as well as EI-mass spectroscopic methods. The X-ray structure of the ligand Boc-SH was also determined. Spectral data showed that the carbamate ligand act as anioinic bidentate through one immine nitrogen and one thiolate sulfur donor atoms. The spectral techniques suggest that both complexes appear to have square planar geometries. The very low electrical conductance of the two complexes supports their neutral nature. The redox behaviors of the obtained complexes were also investigated by cyclic voltammetry. The monomeric nature of both complexes was assessed from their magnetic susceptibility values. The thermoanalytical data evidence that complex (2) is stable up to 165°C and undergo complete decomposition, resulting in NiO as a residual product. The TEM image of the obtained oxide residue showed its nanosize cluster, suggesting that complex (2) may be used as a precursor for the formation of nanooxide. The methylation reactions of the two dithiolate complexes (1) and (2) with methyl iodide appear to occur intramolecularly at the metal(II)-bound dithiolates, forming the metal(II)-bound dithioether complexes [M(Boc-SCH3)2]I2 with clean second-order constants of 7.95×10(-2) and 10.59×10(-2) M(-1) s(-1), respectively.
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Affiliation(s)
- Mohamed M Ibrahim
- Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Kafr El-Sheikh University, Egypt.
| | - Gaber A M Mersal
- Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, South Valley University, Qena, Egypt
| | - Nagi El-Shafai
- Department of Chemistry, Faculty of Science, Kafr El-Sheikh University, Egypt
| | | | - Mohamed M Youssef
- Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Cairo University, Egypt
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15
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Scheiper C, Schulz S, Wölper C, Bläser D, Roll J. Synthesis and Single Crystal X-ray Structures of Cationic Zincβ-Diketiminate Complexes. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300119] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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16
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Schulz S, Schäper R, Bläser D, Wölper C. Synthesis and X-ray Crystal Structures of Homoleptic Zinc Complexes Containing Monoanionicβ-Ketoiminato and Bis(thiophosphinoyl)methanediide Ligands. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200115] [Citation(s) in RCA: 13] [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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17
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Thioimidazolate versus pyrazolate-zinc(II)-bound hydroxo complex as structural model for the active site of hydrolytic enzyme: the crystal structure of the inclusion complex TtZn–O–C6H4–p-NO2, Tt = hydrotris(N-xylyl-2-thioimidazolyl)borate. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-011-9947-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Zack LN, Sun M, Bucchino MP, Clouthier DJ, Ziurys LM. Gas-Phase Synthesis and Structure of Monomeric ZnOH: A Model Species for Metalloenzymes and Catalytic Surfaces. J Phys Chem A 2012; 116:1542-50. [DOI: 10.1021/jp209875a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lindsay N. Zack
- Department
of Chemistry, Department
of Astronomy and Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721, United States
| | - Ming Sun
- Department
of Chemistry, Department
of Astronomy and Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721, United States
| | - Matthew P. Bucchino
- Department
of Chemistry, Department
of Astronomy and Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721, United States
| | - Dennis J. Clouthier
- Department of Chemistry, University of Kentucky, 125 Chemistry-Physics Building,
Lexington, Kentucky 40506, United States
| | - Lucy M. Ziurys
- Department
of Chemistry, Department
of Astronomy and Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721, United States
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Oseback SN, Shim SW, Kumar M, Greer SM, Gardner SR, Lemar KM, DeGregory PR, Papish ET, Tierney DL, Zeller M, Yap GPA. Crowded bis ligand complexes of TtzPh,Me with first row transition metals rearrange due to ligand field effects: structural and electronic characterization (TtzPh,Me = tris(3-phenyl-5-methyl-1,2,4-triazolyl)borate). Dalton Trans 2012; 41:2774-87. [DOI: 10.1039/c2dt12029a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Shannon N Oseback
- Departments of Chemistry, Drexel University, Philadelphia, PA 19104, USA
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20
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Ibrahim MM. Zinc(II)-bound thiolate complexes-containing cysteine derivatives modeling of methionine synthase alkylating enzyme. J Sulphur Chem 2010. [DOI: 10.1080/17415993.2010.509799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mohamed M. Ibrahim
- a Chemistry Department, Faculty of Science , Kafrelsheikh University , Kafr El-sheikh, 33516, Egypt
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Wheaton CA, Hayes PG. Cationic organozinc complexes of a bis(phosphinimine) pincer ligand: synthesis, structural and polymerization studies. Dalton Trans 2010; 39:3861-9. [DOI: 10.1039/b922543a] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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23
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Ibrahim MM. Functionalized S4Zn (II) complexes as structural modelling for the active site of thiolate-alkylating enzymes: The crystal structure of [TtiZn–SpyH]2·HClO4 [Tti=tris(thioimidazolyl)hydroborate and SpyH=pyridine-2-thiol]. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.08.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Ibrahim MM, Al-Juaid SS, Mohsen Q. Synthesis and Characterization of 2-Mercapto-1-cyclohexylimidazole–Based Zinc(II) and Cadmium(II) Bromide Complexes: The Crystal Structure of [Zn(Hmim chexyl )2(Br)2] with N–H…Br Intermolecular Hydrogen Bonding Interactions. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500802454136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Mohamed M. Ibrahim
- a Chemistry Department, Faculty of Science , Kafrelsheik University , Kafrelsheik, Egypt
- b Chemistry Department, Faculty of Science , Taif University , Taif, Saudi Arabia
| | - Salih S. Al-Juaid
- c Chemistry Department, Faculty of Science , King Abd Al Aziz University , Jeddah, Saudi Arabia
| | - Q. Mohsen
- b Chemistry Department, Faculty of Science , Taif University , Taif, Saudi Arabia
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Klitzke JS, Roisnel T, Carpentier JF, Casagrande OL. Zinc(II) complexes based on sterically hindered hydrotris(pyrazolyl)borate ligands: Synthesis, reactivity and solid-state structures. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.04.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Galardon E, Tomas A, Selkti M, Roussel P, Artaud I. Synthesis, Characterization, and Reactivity of Alkyldisulfanido Zinc Complexes. Inorg Chem 2009; 48:5921-7. [DOI: 10.1021/ic900238v] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Erwan Galardon
- Laboratoire de Chimie et Biochimie Pharmacologique et Toxicologique, UMR 8601 CNRS, Université Paris Descartes, 45 rue des Saints Pères, 75270 Paris cedex 06, France
| | - Alain Tomas
- Laboratoire de Cristallographie et RMN Biologiques, UMR 8015 CNRS, Université Paris Descartes, 4 avenue de l’Observatoire, 75270 Paris cedex 06, France
| | - Mohamed Selkti
- Laboratoire de Cristallographie et RMN Biologiques, UMR 8015 CNRS, Université Paris Descartes, 4 avenue de l’Observatoire, 75270 Paris cedex 06, France
| | - Pascal Roussel
- UCCS − Unité de Catalyse et Chimie du Solide, UMR 8012 CNRS, École Nationale Supérieure de Chimie de Lille BP 90108 − 59652 Villeneuve d’Ascq cedex, France
| | - Isabelle Artaud
- Laboratoire de Chimie et Biochimie Pharmacologique et Toxicologique, UMR 8601 CNRS, Université Paris Descartes, 45 rue des Saints Pères, 75270 Paris cedex 06, France
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Powell-Jia D, Ziller JW, DiPasquale AG, Rheingold AL, Borovik AS. A structure and reactivity analysis of monomeric Ni(II)-hydroxo complexes prepared from water. Dalton Trans 2009:2986-92. [PMID: 19352526 PMCID: PMC3863642 DOI: 10.1039/b820209e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nickel(ii) chemistry with the tridentate ligands bis[(N'-R-ureido)-N-ethyl]-N-methylamine (H(4)(R), R = isopropyl, tert-butyl) is described. The Ni(ii)-OH complexes, [Ni(II)H(2)(R)(OH)](-) were generated using water as the source of the hydroxo ligand. These complexes are pseudo-square planar, in which the primary coordination sphere contains three nitrogen donors from [H(2)(R)](2-) and the oxygen atom from the hydroxide (Ni-O(H), 1.857(1) A). The Ni(ii)-OH unit also is involved in two intramolecular hydrogen bonds between the urea groups of the [H(2)(R)](2-) and the hydroxo oxygen atom. Attempts to deprotonate the Ni(ii)-OH unit to produce Ni(ii)-oxo complexes were unsuccessful. A variety of bases with pK(a) of less than 15 (in DMSO) were unable to deprotonate the hydroxo ligand. Treating the Ni(ii)-OH complexes with KOBu(t) (pK(a) approximately 29) afforded the ligand substitution product, [Ni(II)H(2)(R)(OBu(t))](-). Ni(ii)-siloxide complexes were isolated when the [Ni(II)H(2)(R)(OH)](-) complexes were allowed to react with K[N(TMS)(2)].
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Affiliation(s)
- Darla Powell-Jia
- Department of Chemistry, University of California Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - Joseph W. Ziller
- Department of Chemistry, University of California Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - Antonio G. DiPasquale
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093, USA
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093, USA
| | - A. S. Borovik
- Department of Chemistry, University of California Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
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Affiliation(s)
- Mark D. Spicer
- WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK, Fax: +44‐141‐548‐4822
| | - John Reglinski
- WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK, Fax: +44‐141‐548‐4822
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Ibrahim MM, Shaban SY. Synthesis, characterization, and crystal structures of hydrotris(2-mercapto-1-imidazolyl)borate-based zinc(II) and copper(I) complexes. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.07.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Roy S, Patra AK, Dhar S, Chakravarty AR. Photosensitizer in a Molecular Bowl and its Effect on the DNA-Binding and -Cleavage Activity of 3d-Metal Scorpionates. Inorg Chem 2008; 47:5625-33. [DOI: 10.1021/ic702508r] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sovan Roy
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Ashis K. Patra
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Shanta Dhar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Akhil R. Chakravarty
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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Kunz PC, Zribi A, Frank W, Kläui W. Unexpected Coordination Modes of the Tris(imidazolyl)phosphane Oxide Ligand 4-TIPOiPr in the Chloro Complexes of Zinc, Cobalt and Nickel. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200700473] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
In this perspective some results from the work by the author's research group on the coordination chemistry of zinc are presented. They are selected so as to highlight the principles which, in the opinion of the author, make zinc unique in its ability to function as the catalytic center for an ever-increasing number of biological processes. In essence, the "non-properties" of zinc are the basis of its success: no redox chemistry, no ligand field effects, no typical coordination numbers or geometries, no stability or inertness of its complexes, no typical "hard" or "soft" characteristics. The chemistry presented here is centered around the "Freiburg Enzyme Model", the pyrazolylborate-ligated zinc-hydroxide complex. The topics discussed in detail include the zinc-water combination, the non-similarity between the Zn-OH and the Zn-SH, Zn-OR or Zn-SR complexes, and the functionalization of CO(2) by zinc-bound nucleophiles. The value of structure correlation analysis for the elucidation of mechanistic details is demonstrated, and the first examples of catalysis by the TpZn-OH complexes are presented.
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Affiliation(s)
- Heinrich Vahrenkamp
- Institut für Anorganische und Analytische Chemie der Universität Freiburg, Albertstr. 21, D-79104 Freiburg, Germany
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Kunz PC, Zribi A, Frank W, Kläui W. Synthesis and Characterization of Water-Soluble Zinc, Cobalt(II) and Copper(II) Complexes with a Neutral TripodalN,N,N-Ligand: Crystal Structures of [(κ3N-4-TIPOiPr)Co(H2O)(κ2O-NO3)]NO3 and [(κ3N-4-TIPOiPr)Cu(H2O)(κO-SO4)], 4-TIPOiPr = tris(2-isopropylimidazol-4(5)-yl)phosphane oxide. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Notni J, Schenk S, Protoschill-Krebs G, Kesselmeier J, Anders E. The Missing Link in COS Metabolism: A Model Study on the Reactivation of Carbonic Anhydrase from its Hydrosulfide Analogue. Chembiochem 2007; 8:530-6. [PMID: 17304603 DOI: 10.1002/cbic.200600436] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Carbonic anhydrase (CA) is known to react with carbonyl sulfide, an atmospheric trace gas, whereby H(2)S is formed. It has been shown that, in the course of this reaction, the active catalyst, the His(3)ZnOH structural motif, is converted to its hydrosulfide form: His(3)ZnOH+COS-->His(3)ZnSH+CO(2). In this study, we elucidate the mechanism of reactivation of carbonic anhydrase (CA) from its hydrosulfide analogue by using density functional calculations, a model reaction and in vivo experimental investigation. The desulfuration occurs according to the overall equation His(3)ZnSH+H(2)O right harpoon over left harpoon His(3)ZnOH+H(2)S. The initial step is a protonation equilibrium at the zinc-bound hydrosulfide. The hydrogen sulfide ligand thus formed is then replaced by a water molecule, which is subsequently deprotonated to yield the reactivated catalytic centre of CA. Such a mechanism is thought to enable a plant cell to expel H(2)S or rapidly metabolise it to cysteine via the cysteine synthase complex. The proposed mechanism of desulfuration of the hydrosulfide analogue of CA can thus be regarded as the missing link between COS consumption of plants and their sulfur metabolism.
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Affiliation(s)
- Johannes Notni
- Friedrich-Schiller-Universität Jena, Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstrasse 10, 07743 Jena, Germany
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Kunz PC, Kläui W. Zinc and Cobalt(II) Complexes of Tripodal Nitrogen Ligands of the Tris[2-substituted Imidazol-4(5)-yl]phosphane Type. Biomimetic Hydrolysis of an Activated Ester. ACTA ACUST UNITED AC 2007. [DOI: 10.1135/cccc20070492] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Novel tris[2-substituted imidazol-4(5)-yl]phosphane (4-TIPR) ligands 2b (R = Ph) and 2c (R = tBu) were prepared as model ligands for the tris(histidine) motif found in many zinc enzymes. They readily form cobalt and zinc nitrato and chloro complexes in protic solvents. The steric requirements of the substituents R in 4(5)-position of the 4-TIPR ligands (R = iPr (2a), Ph (2b), tBu (2c)) is discussed on the basis of their UV/VIS spectra. Zinc complexes of 2a and 2c were studied due to their ability to promote the hydrolysis of the activated ester 4-nitrophenyl pyridine-2-carboxylate (pNpic).
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