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Enamullah M, Al-moktadir Zaman M, Bindu MM, Islam MK, Islam MA. Experimental and theoretical studies on isatin-Schiff bases and their copper(II)-complexes: Syntheses, spectroscopy, tautomerism, redox potentials, EPR, PXRD and DFT/TDDFT. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Vieira RP, Thompson JR, Beraldo H, Storr T. Partial conversion of thioamide into nitrile in a copper(II) complex of 2,6-diacetylpyridine bis(thiosemicarbazone), a drug prototype for Alzheimer's disease. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2015; 71:430-4. [PMID: 26044321 DOI: 10.1107/s205322961500813x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 04/23/2015] [Indexed: 03/17/2023]
Abstract
This work reports the crystal structure of [(Z)-2-((E)-1-{6-[1-({[amino(sulfanidyl-κS)methylidene]amino}imino-κN)ethyl]pyridin-2-yl-κN}ethylidene)-1-cyanohydrazinido-κN(1)]copper(II), [Cu(C11H11N7S)], the first description of a copper(II) complex of 2,6-diacetylpyridine bis(thiosemicarbazone) showing partial conversion of a thioamide group to a nitrile group. The asymmetric ligand coordinates to the metal centre in an N,N',N'',S-tetradentate manner via the pyridine N atom, an imine N atom, the hydrazinide N atom and the sulfanidyl S atom, displaying a square-planar geometry. Ligand coordination results in two five-membered chelate rings and one six-membered chelate ring, and in crystal packing based on N-H···N hydrogen bonds of the cyanohydrazinide and hydrazinecarbothioamidate arms of the ligand. The correlation between the partial conversion upon metal complexation, H2S release and possible effects on the activity of bis(thiosemicarbazone)s as drug prototypes for Alzheimer's disease is also discussed.
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Affiliation(s)
- Rafael P Vieira
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - John R Thompson
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - Heloisa Beraldo
- Departamento de Quimica, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
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Rao YS, Prathima B, Reddy SA, Madhavi K, Reddy AV. Complexes of Cu(II) and Ni(II) with Bis(Phenylthiosemicarbazone): Synthesis, Spectral, EPR andin Vitro- Antibacterial and Antioxidant Activity. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000094] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Akbar Ali M, Mirza AH, Yee CY, Rahgeni H, Bernhardt PV. Mixed-ligand ternary complexes of potentially pentadentate but functionally tridentate Schiff base chelates. Polyhedron 2011. [DOI: 10.1016/j.poly.2010.11.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ali MA, Mirza AH, Chartres JD, Bernhardt PV. Synthesis, characterization and X-ray crystal structures of seven-coordinate pentagonal-bipyramidal zinc(II), cadmium(II) and tin(IV) complexes of a pentadentate N3S2 thiosemicarbazone. Polyhedron 2011. [DOI: 10.1016/j.poly.2010.10.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Casas JS, Castro‐Vidal E, García‐Tasende MS, Sánchez A, Sordo J, Touceda Á, Vázquez‐López EM. A Conspicuous Deprotonation in Complexes of Diphenyllead(IV) with Ligands Containing Both Semicarbazone and Thiosemicarbazone Chains. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- José S. Casas
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain, Fax: +34‐981‐547102
| | - Estefanía Castro‐Vidal
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain, Fax: +34‐981‐547102
| | - María S. García‐Tasende
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain, Fax: +34‐981‐547102
| | - Agustín Sánchez
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain, Fax: +34‐981‐547102
| | - José Sordo
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain, Fax: +34‐981‐547102
| | - Ángeles Touceda
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain, Fax: +34‐981‐547102
| | - Ezequiel M. Vázquez‐López
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Vigo, 36310 Vigo, Galicia, Spain
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Akbar Ali M, Huq Mirza A, Kok Wei L, Bernhardt PV, Atchade O, Song X, Eng G, May L. Synthesis and characterization of pentagonal bipyramidal organotin(IV) complexes of 2,6-diacetylpyridine Schiff bases of S-alkyl- and aryldithiocarbazates. J COORD CHEM 2010. [DOI: 10.1080/00958971003739798] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mohammad Akbar Ali
- a Department of Chemistry , Universiti Brunei Darussalam , Jalan Tungku Link, BE 1410, Negara Brunei Darussalam
| | - Aminul Huq Mirza
- a Department of Chemistry , Universiti Brunei Darussalam , Jalan Tungku Link, BE 1410, Negara Brunei Darussalam
| | - Lim Kok Wei
- a Department of Chemistry , Universiti Brunei Darussalam , Jalan Tungku Link, BE 1410, Negara Brunei Darussalam
| | - Paul V. Bernhardt
- b Department of Chemistry , The University of Queensland , QLD 4072, Australia
| | - Olaniran Atchade
- c Department of Chemistry and Physics , University of the District of Columbia , Washington, DC 20008, USA
| | - Xueqing Song
- c Department of Chemistry and Physics , University of the District of Columbia , Washington, DC 20008, USA
| | - George Eng
- c Department of Chemistry and Physics , University of the District of Columbia , Washington, DC 20008, USA
| | - Leopold May
- d Department of Chemistry , The Catholic University of America , Washington, DC 20064, USA
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Krishnan S, Laly K, Prathapachandra Kurup MR. Synthesis and spectral investigations of Mn(II) complexes of pentadentate bis(thiosemicarbazones). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:585-588. [PMID: 20018556 DOI: 10.1016/j.saa.2009.11.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2009] [Revised: 11/10/2009] [Accepted: 11/10/2009] [Indexed: 05/28/2023]
Abstract
Five Mn(II) complexes of bis(thiosemicarbazones) which are represented as [Mn(H(2)Ac4Ph)Cl(2)] (1), [Mn(Ac4Ph)H(2)O] (2), [Mn(H(2)Ac4Cy)Cl(2)].H(2)O (3), [Mn(H(2)Ac4Et)Cl(2)].3H(2)O (4) and [Mn(H(2)Ac4Et)(OAc)(2)].3H(2)O (5) have been synthesized and characterized by elemental analyses, electronic, infrared and EPR spectral techniques. In all the complexes except [Mn(Ac4Ph)H(2)O], the ligands act as pentadentate neutral molecules and coordinate to Mn(II) ion through two thione sulfur atoms, two azomethine nitrogens and the pyridine nitrogen, suggesting a heptacoordination. While in compound [Mn(Ac4Ph)H(2)O], the dianionic ligand is coordinated to the metal suggesting six coordination in this case. Magnetic studies indicate the high spin state of Mn(II). Conductivity measurements reveal their non-electrolyte nature. EPR studies indicate five g values for [Mn(Ac4Ph)H(2)O] showing zero field splitting.
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Affiliation(s)
- Suja Krishnan
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682022, Kerala, India
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Singh HL. Synthesis, Spectral, and 3D Molecular Modeling of Tin(II) and Organotin(IV) Complexes of Biologically Active Schiff Bases Having Nitrogen and Sulfur Donor Ligands. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500802340236] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sedaghat T, Rahmani M. Synthesis and Spectroscopic Investigations of New Schiff Base Complexes of Tin(IV). PHOSPHORUS SULFUR 2008. [DOI: 10.1080/10426500701589107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Tahereh Sedaghat
- a Department of Chemistry, College of Sciences , Shahid Chamran University , Ahvaz , Iran
| | - Mahbobeh Rahmani
- a Department of Chemistry, College of Sciences , Shahid Chamran University , Ahvaz , Iran
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Casas JS, Castellano EE, Ellena J, García-Tasende MS, Namor F, Sánchez A, Sordo J, Vidarte MJ. Methyllead(IV) Derivatives Stabilized by DAPTSC2–: Synthesis and Structures of New Diorganolead(IV) Complexes. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700096] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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de Sousa GF, Manso LCC, Lang ES, Gatto CC, Mahieu B. Syntheses, structural and spectral studies of six-coordinate, [Ph2SnCl(acpm)], and seven-coordinate, [nBu2Sn(dapm)], diorganotin(IV) complexes with N,N,S-tridentate and S,N,N,N,S-pentadentate N4-heterocyclic thiosemicarbazones. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2006.04.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Preparation and characterization of pentagonal-bipyramidal zinc(II) and cadmium(II) complexes of a neutral N3S2 thiosemicarbazone derived from 2N-methylthiosemicarbazide and the X-ray crystal and molecular structures of the free ligand and its cadmium(II) complex, Cd(dap-2NMetsc)(NO3)2. Polyhedron 2006. [DOI: 10.1016/j.poly.2006.06.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Synthesis, 119Sn Mössbauer spectroscopic studies and X-ray crystal structure determination of new seven-coordinate diorganotin(IV) complexes with S,N,N,N,S-pentadentate Schiff bases derived from 2,6-diacetylpyridine of S-methyl- and S-benzyldithiocarbazates. TRANSIT METAL CHEM 2006. [DOI: 10.1007/s11243-006-0059-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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de Sousa GF, Deflon VM, Gambardella MTDP, Francisco RHP, Ardisson JD, Niquet E. X-ray Crystallographic and Mössbauer Spectroscopic Applications in Dependence of Partial Quadrupole Splitting, [R], on the C−Sn−C Angle in Seven-Coordinated Diorganotin(IV) Complexes. Inorg Chem 2006; 45:4518-25. [PMID: 16711702 DOI: 10.1021/ic0516360] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and the IR, NMR (1H, 13C, and 119Sn), and Mössbauer spectroscopies and single-crystal X-ray diffraction studies of seven-coordinated diorganotin(IV) complexes, namely, [Ph2Sn(Hdapsc)]Cl.H2O.DMF [7; H(2)dapsc = 2,6-diacetylpyridine bis(semicarbazone)], [Me(2)Sn(H2,6Achexim)]Br.H2O [8; H(2)2,6Achexim = 2,6-diacetylpyridine bis(3-hexamethyleneiminylthiosemicarbazone)], [Me(2)Sn(dapmts)] [9; H(2)dapmts = 2,6-diacetylpyridine bis(4-methythiosemicarbazone)], and [nBu2Sn(dapmdtc)] [10; H(2)dapmdtc = 2,6-diacetylpyridine bis(S-methydithiocarbazate)], were done. The determination of the structures of [Ph(2)Sn(Hdapsc)]+, [Me2Sn(H2,6Achexim)]+ and [Me2Sn(dapmts)], [nBu2Sn(dapmdtc)] revealed the presence of monocationic and neutral complexes, respectively. The structures consist of monomeric units in which the Sn(IV) ions exhibit distorted pentagonal-bipyramidal geometries, with the X,N,N,N,X-donor (X = O, S) systems of the ligands lying in the equatorial plane and the organic groups in the apical positions. The C-Sn-C angle in the seven-coordinated diorganotin(IV) complexes was estimated using a correlation between Mössbauer and X-ray data based on the point-charge model and using new values obtained in this work for [alkyl] = -1.00 mm s(-1) and [aryl] = -0.80 mm s(-1) for complexes containing O,N,N,N,O-pentadentate ligands and new values for [alkyl] = -0.87 mm s(-1) and [aryl] = -0.75 mm s(-1) for complexes containing S,N,N,N,S-pentadentate ligands.
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The preparation and characterization of seven-coordinate tin(IV) complexes of the 2,6-diacetylpyridine Schiff bases of S-alkyl/aryl-dithiocarbazates and the X-ray crystal structure of the [Sn(dapsme)I2] complex (dapsme=doubly deprotonated form of the 2,6-diacetylpyridine Schiff base of S-methyldithiocarbazate). Polyhedron 2004. [DOI: 10.1016/j.poly.2004.05.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Reaction of R(Ph)SnCl2(R=Me, Et) with 2,6-diacetylpyridine bis(thiosemicarbazone) (H2DAPTSC): the crystal structures of [Me(Ph)Sn(HDAPTSC)]Cl·1.25 MeOH and [Et(Ph)Sn(H2DAPTSC)]Cl2·MeOH·H2O. Inorganica Chim Acta 2004. [DOI: 10.1016/j.ica.2004.01.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Casas JS, Castellano EE, Ellena J, García-Tasende MS, Sánchez A, Sordo J, Vázquez-López EM, Vidarte MJ. Synthesis, Spectroscopic and Structural Aspects of Mono- and Diorganothallium(III) Complexes of 2, 6-Diacetylpyridine Bis(thiosemicarbazone) (H2DAPTSC) — A New Coordination Mode of the HDAPTSC— Anion. Z Anorg Allg Chem 2003. [DOI: 10.1002/zaac.200390042] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Beraldo H, da Costa RFF, Lima R, de Lima GM, Lula IS, Mahieu B. Complexes of Tin(IV) Tetrachloride with 3-Formylpyridine Semicarbazone and Thiosemicarbazones. PHOSPHORUS SULFUR 2002. [DOI: 10.1080/10426500214298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Singh HL, Varshney AK. Synthesis and characterization of coordination compounds of organotin(IV) with nitrogen and sulfur donor ligands. Appl Organomet Chem 2001. [DOI: 10.1002/aoc.234] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Casas J, Garcı́a-Tasende M, Sordo J. Main group metal complexes of semicarbazones and thiosemicarbazones. A structural review. Coord Chem Rev 2000. [DOI: 10.1016/s0010-8545(00)00363-5] [Citation(s) in RCA: 467] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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de Sousa GF, West DX, Brown CA, Swearingen JK, Valdés-Martı́nez J, Toscano RA, Hernández-Ortega S, Höherner M, Bortoluzzi AJ. Structural and spectral studies of a heterocyclic N(4)-substituted bis(thiosemicarbazone), H22,6Achexim·H2O, its heptacoordinated tin(IV) complex [Bu2Sn(2,6Achexim)], and its binuclear zinc(II) complex [Zn(2,6Achexim)]2. Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00326-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abram S, Maichle-Mössmer C, Abram U. Synthesis and characterization of indium(III) complexes with tri- and pentadentate thiosemicarbazones. Crystal and molecular structure of [InCl2(HDAPTSC)] · 2 DMSO, {O[In(HDAPTSC)(OH)]2} · 5MeOH, [InCl2(APTSC)(MeOH)], [In(APTSC)2]PF6 and (H2APTSC)][InCl(APTSC)(mnt)] · 0.5 H2O (H2DAPTSC = 2,6-diacetylpyridine-bis(thiosemicarbazone), HAPTSC = 2-acetylpyridine-thiosemicarbazone, mnt2 = 1,2-dicyanoethene-1,2-dithiolate). Polyhedron 1998. [DOI: 10.1016/s0277-5387(97)00240-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lobana T, Sánchez A, Casas J, García-Tasende M, Sordo J. Synthesis and NMR spectroscopy of dichlorobis (acetophenonethiosemicarbazone) mercury (II) formed from phenylmercury (II) chloride and acetophenonethiosemicarbazone: the first example of symmetrisation in organomercury (II)-thiosemicarbazone chemistry. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)05574-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Casas J, Castellano EE, Rodríguez-Argüelles MC, Sánchez A, Sordo J, Zukerman-Schpector J. Pyridoxal thiosemicarbazonate monohydrate of dimethylthallium(III): X-ray structure and spectroscopic properties. Inorganica Chim Acta 1997. [DOI: 10.1016/s0020-1693(96)05565-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Knoll S, Tschwatschal F, Ristau T, Gelbrich T, Borsdorf R, Zahn G. Diorganozinn(IV)-Derivate dreiz�hniger Dithiocarbazone - Strukturuntersuchungen in L�sung und im festen Zustand. Z Anorg Allg Chem 1997. [DOI: 10.1002/zaac.19976230123] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Casas JS, Castellano EE, Garc�a-Tasende MS, S�nchez A, Sordo J, Zukerman-Schpector J. Cadmium(II) Complexes of 2,6-Diacetylpyridine Bis- and Monothiosemicarhazones. The crystal structure of aquodichloro(2,6-diacetylpyridine monothiosemicarbazone-N,N?,O,S)cadmium(II) monohydrate. Z Anorg Allg Chem 1997. [DOI: 10.1002/zaac.199762301130] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Casas JS, García-Tasende MS, Maichle-Mössmer C, Rodríguez-Argüelles MC, Sánchez A, Sordo J, Vázquez-López A, Pinelli S, Lunghi P, Albertini R. Synthesis, structure, and spectroscopic properties of acetato(dimethyl)(pyridine-2-carbaldehydethiosemicarbazonato)tin(IV) acetic acid solvate, [SnMe2(PyTSC)(OAc)].HOAc. Comparison of its biological activity with that of some structurally related diorganotin(IV) bis(thiosemicarbazonates). J Inorg Biochem 1996; 62:41-55. [PMID: 8936422 DOI: 10.1016/0162-0134(95)00087-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The synthesis, X-ray structure, behavior in solution, and biological properties of the complex [SnMe2(PyTSC)(OAc)].HOAc (HPyTSC = pyridine-2-carbaldehydethiosemicarbazone) are reported. The tin atom of this complex is coordinated to an N,N,S-tridentate PyTSC- anion, to a monodentate acetate ion, and to the two methyl groups in an approximately pentagonal bipyramidal environment with a vacant equatorial position. The complex partially evolves in DMSO and in DMSO/CHxCl4-x (X = 1, 2) mixtures, giving HPyTSC and SnMe2(OAc)2. [SnMe2 (PyTSC)(OAc)].HOAc, [SnMe2(DAPTSC)], and [SnPh2(DAPTSC)].2DMF (H2DAPTSC = 2,6-diacetylpyridine bis(thiosemicarbazone)) all suppress proliferation of Friend erythroleukaemia cells (FLC). DMSO-induced differentiation of FLC is slightly suppressed by [SnMe2(DAPTSC)] and is unaffected by [SnPh2(DAPTSC)].2DMF and [SnMe2(PyTSC)(OAc)].HOAc.
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Affiliation(s)
- J S Casas
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Galicia, Spain
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Rodriguez-Argüelles MC, Belicchi Ferrari M, Gasparri Fava G, Pelizzi C, Tarasconi P, Albertini R, Dall'Aglio PP, Lunghi P, Pinelli S. 2,6-diacetylpyridine bis(thiosemicarbazones) zinc complexes: synthesis, structure, and biological activity. J Inorg Biochem 1995; 58:157-75. [PMID: 7782786 DOI: 10.1016/0162-0134(94)00043-a] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The reaction of zinc chloride, acetate, or perchlorate with two bis(thiosemicarbazones) of 2,6-diacetylpyridine [H2daptsc = 2,6-diacetylpyridine bis(thiosemicarbazone) and H2dapipt = 2,6-diacetylpyridine bis(hydrazinopyruvoylthiosemicarbazone)] leads to the formation of four novel complexes that have been characterized by spectroscopic studies (NMR, IR) and biological properties. The crystal structures of the two compounds--[Zn(daptsc)]2.2DMF (1) and [Zn(H2dapipt)(OH2)2](CIO4)2.3H2O (2)--also have been determined by x-ray methods from diffractometer data. Compound (1) is dimeric and the two zinc atoms have a distorted octahedral coordination. The ligand is deprotonated. In compound (2), the coordination geometry about zinc is pentagonal--bipyramidal and the ligand is in the neutral form. The molecular structure of (2) consists of cations [Zn(H2dapipt)(OH2)]2+, CIO4- disordered anions, and three water molecules of solvation. Biological studies have shown that the ligands and the complexes Zn(daptsc).1/2EtOH and Zn(H2daptsc)Cl2 have an effect in vitro on cell proliferation and differentiation (inhibition); both are concentration dependent. [Zn(daptsc)]2.2DMF (1) shows the effects at lower concentration values with respect to other compounds.
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