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Mallikarjuna N, Keshavayya J, Ravi B. Synthesis, spectroscopic characterization, antimicrobial, antitubercular and DNA cleavage studies of 2-(1H-indol-3-yldiazenyl)-4, 5, 6, 7-tetrahydro-1, 3-benzothiazole and its metal complexes. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.07.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Keypour H, Mahmoudabadi M, Shooshtari A, Hosseinzadeh L, Mohsenzadeh F, Gable RW. Synthesis of Mn(II) and Zn(II) complexes with new macrocyclic Schiff-base ligands containing piperazine moiety: Spectroscopic, structural, cytotoxic and antibacterial properties. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.02.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Halli M, Sumathi R. Synthesis, physico-chemical investigations and biological screening of metal (II) complexes with Schiff base derived from naphthofuran-2-carbohydrazide and citral. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.06.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Refat MS, Abdel-Hafez SH. Synthesis and spectroscopic studies of the new Ag(I) organoselenium complex. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216050285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Reddy PM, Shanker K, Srinivas V, Krishna ER, Rohini R, Srikanth G, Hu A, Ravinder V. Hydrolysis of Letrozole catalyzed by macrocyclic Rhodium (I) Schiff-base complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 139:43-48. [PMID: 25554950 DOI: 10.1016/j.saa.2014.12.033] [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: 03/30/2014] [Revised: 07/23/2014] [Accepted: 12/09/2014] [Indexed: 06/04/2023]
Abstract
Ten mononuclear Rhodium (I) complexes were synthesized by macrocyclic ligands having N4 and N2O2 donor sites. Square planar geometry is assigned based on the analytical and spectral properties for all complexes. Rh(I) complexes were investigated as catalysts in hydrolysis of Nitrile group containing pharmaceutical drug Letrozole. A comparative study showed that all the complexes are efficient in the catalysis. The percent yields of all the catalytic reaction products viz. drug impurities were determined by spectrophotometric procedures and characterized by spectral studies.
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Affiliation(s)
- P Muralidhar Reddy
- Department of Chemistry, Nizam College, Osmania University, Hyderabad, India
| | - K Shanker
- Department of Chemistry, Kakatiya University, Warangal 506 009, Telangana, India
| | - V Srinivas
- Department of Chemistry, Kakatiya University, Warangal 506 009, Telangana, India
| | - E Ravi Krishna
- Department of Chemistry, Kakatiya University, Warangal 506 009, Telangana, India
| | - R Rohini
- Department of Chemistry, Kakatiya University, Warangal 506 009, Telangana, India; Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan
| | - G Srikanth
- Department of Chemistry, Kakatiya University, Warangal 506 009, Telangana, India
| | - Anren Hu
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien, Taiwan.
| | - V Ravinder
- Department of Chemistry, Kakatiya University, Warangal 506 009, Telangana, India.
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Halli MB, Sumathi RB. Antimicrobial, DNA cleavage, and antioxidant properties of new series of metal(II) complexes derived from naphthofuran-2-carbohydrazide Schiff base: synthesis and physico-chemical studies. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0804-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Faheim AA, Abdou SN, Abd El-Wahab ZH. Synthesis and characterization of binary and ternary complexes of Co(II), Ni(II), Cu(II) and Zn(II) ions based on 4-aminotoluene-3-sulfonic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 105:109-124. [PMID: 23295217 DOI: 10.1016/j.saa.2012.12.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 12/02/2012] [Accepted: 12/06/2012] [Indexed: 06/01/2023]
Abstract
Salicylidene (4-aminotoluene-3-sulfonic acid) Schiff base ligand H(2)L, and its binary and ternary Co(II), Ni(II), Cu(II) and Zn(II) complexes using 8-hydroxyquinoline (8-HOqu) and 2-aminopyridine (2-Ampy) as secondary ligands have been synthesised and characterized via elemental analysis, spectral data (IR, (1)H NMR, mass and solid reflectance), molar conductance, magnetic moment, TG-DSC measurements and XRPD analysis. Correlation of all spectroscopic data suggest that H(2)L ligand acts as monoanionic terdentate ligand with ONO sites coordinating to the metal ions via deprotonated phenolic-O, azomethine-N and sulfonate-O while 2-Ampy behaves as a neutral monodentate ligand via amino group-N and 8-HOqu behaves as a monoanionic bidentate ligand through the ring-N and deprotonated phenolic-O. The thermal behavior of these complexes shows that the coordinated water molecules were eliminated from the complexes at relatively higher temperatures than the hydrated water and there are two routes in removal of coordinated water molecules. All complexes have mononuclear structure and the tetrahedral, square planar or an octahedral geometry have been proposed. The ligand and its complexes have been screened for their antimicrobial activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Salmonella typhimurium, Candida albicans and Aspergillus fumigatus. Among the synthesised compounds, the binary and ternary Ni(II) complexes, (2, 8 and 10) and ternary Zn(II) complex, (12) were found to be very effective against Candida albicans and Bacillus subtilis than all other complexes with MICs of 2 and 8 μg/mL, respectively.
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Affiliation(s)
- Abeer A Faheim
- Chemistry Department, College of Education and Science (Khurma), Taif University, Al-khurma, Taif, Saudi Arabia.
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Halli MB, Sumathi RB, Kinni M. Synthesis, spectroscopic characterization and biological evaluation studies of Schiff's base derived from naphthofuran-2-carbohydrazide with 8-formyl-7-hydroxy-4-methyl coumarin and its metal complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 99:46-56. [PMID: 23041921 DOI: 10.1016/j.saa.2012.08.089] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 08/17/2012] [Accepted: 08/31/2012] [Indexed: 06/01/2023]
Abstract
Metal complexes of the type ML(2), where M=Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Hg(II) and L=Schiff's base derived from the condensation of naphthofuran-2-carbohydrazide with 8-formyl-7-hydroxy-4-methyl coumarin have been synthesized. The chelation of the complexes have been elucidated in the light of analytical, IR, UV-vis, (1)H NMR, mass, ESR spectral data, thermal and magnetic studies. The measured molar conductance values indicate that, the complexes are non-electrolytic in nature. The redox behavior of one of the synthesized metal complexes was investigated by cyclic voltammetry. The Schiff's base and its metal complexes have been screened for their in vitro antibacterial and antifungal activities by MIC method. The DNA cleavage activities of all the complexes were studied by agarose gel electrophoresis method. In addition, the free ligand along with its complexes has been studied for their antioxidant activity.
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Affiliation(s)
- M B Halli
- Department of Chemistry, Gulbarga University, Gulbarga 585106, Karnataka, India.
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Halli MB, Sumathi R. Synthesis, spectroscopic, antimicrobial and DNA cleavage studies of new Co(II), Ni(II), Cu(II), Cd(II), Zn(II) and Hg(II) complexes with naphthofuran-2-carbohydrazide Schiff base. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.05.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Reddy PM, Rohini R, Krishna ER, Hu A, Ravinder V. Synthesis, spectral and antibacterial sudies of copper(II) tetraaza macrocyclic complexes. Int J Mol Sci 2012; 13:4982-4992. [PMID: 22606024 PMCID: PMC3344260 DOI: 10.3390/ijms13044982] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 04/11/2012] [Accepted: 04/12/2012] [Indexed: 11/16/2022] Open
Abstract
A novel family of tetraaza macrocyclic Cu(II) complexes [CuLX(2)] (where L = N(4) donor macrocyclic ligands) and (X = Cl(-), NO(3) (-)) have been synthesized and characterized by elemental analysis, magnetic moments, IR, EPR, mass, electronic spectra and thermal studies. The magnetic moments and electronic spectral studies suggest square planar geometry for [Cu(DBACDT)]Cl(2) and [Cu(DBACDT)](NO(3))(2) complexes and distorted octahedral geometry to the rest of the ten complexes. The biological activity of all these complexes against gram-positive and gram-negative bacteria was compared with the activity of existing commercial antibacterial compounds like Linezolid and Cefaclor. Six complexes out of twelve were found to be most potent against both gram-positive as well as gram-negative bacteria due to the presence of thio group in the coordinated ligands.
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Affiliation(s)
- Puchakayala Muralidhar Reddy
- Department of Chemistry, Kakatiya University, Warangal 506 009, A.P, India; E-Mails: (P.M.R.); (R.R.); (E.R.K.)
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan
| | - Rondla Rohini
- Department of Chemistry, Kakatiya University, Warangal 506 009, A.P, India; E-Mails: (P.M.R.); (R.R.); (E.R.K.)
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan
| | - Edulla Ravi Krishna
- Department of Chemistry, Kakatiya University, Warangal 506 009, A.P, India; E-Mails: (P.M.R.); (R.R.); (E.R.K.)
| | - Anren Hu
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien 97004, Taiwan
| | - Vadde Ravinder
- Department of Chemistry, Kakatiya University, Warangal 506 009, A.P, India; E-Mails: (P.M.R.); (R.R.); (E.R.K.)
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Budige G, Puchakayala MR, Kongara SR, Hu A, Vadde R. Synthesis, Characterization and Biological Evaluation of Mononuclear Co(II), Ni(II), Cu(II) and Pd(II) Complexes with New N2O2 Schiff Base Ligands. Chem Pharm Bull (Tokyo) 2011; 59:166-71. [DOI: 10.1248/cpb.59.166] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | | | - Anren Hu
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University
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Utilization of carboxymethyl cellulose based on bean hulls as chelating agent. Synthesis, characterization and biological activity. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.07.026] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Patil SA, Kamble UV, Badami PS. Antimicrobial and DNA-cleavage studies of 22-membered N4 tetraaza macrocyclic triazoles: template synthesis and physicochemical characterization. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2010; 29:658-75. [PMID: 20706957 DOI: 10.1080/15257770.2010.504600] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A novel series of 22-membered macrocyclic complexes of the type [MLCl(2)] (M=Co(2+), Ni(2+) and Cu(2+)) have been synthesized with newly derived biologically active ligands (L(1)-L(IV)). These ligands were synthesized by the condensation of ortho-phthalaldehyde and bis-(4-amino-5-mercapto-1, 2, 4-triazole-3-yl)alkanes. The mode of bonding and overall geometry of the complexes have been inferred through IR, EPR, electronic spectral studies, conductivity, magnetic, thermal, and electrochemical studies. All these complexes have been screened for their antibacterial (Escherichia coli, Staphylococus aureus, Salmonella typhi, Pseudomonas aeruginosa) and antifungal activities (Aspergillus niger, Aspergillus flavus, and Cladosporium) by the minimal inhibitory concentration (MIC) method. The DNA cleavage study was done by agarose gel electrophoresis technique.
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Affiliation(s)
- Sangamesh A Patil
- P G Department of Chemistry, Karnatak University, Dharwad, Karnataka, India.
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Patil SA, Kamble UV, Badami PS. Antimicrobial and DNA Cleavage Studies of New N2O2Diazadioxa Macrocyclic Schiff Base Co(II), Ni(II) and Cu(II) Complexes Containing Triazole Head Unit: Synthesis and Spectroscopic Approach. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2010. [DOI: 10.1080/10601325.2010.492202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kamble UV, Patil SA, Badami PS. DNA cleavage and antimicrobial studies of 17-membered schiff base macrocyclic triazoles: synthesis and spectroscopic approach. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9794-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Patil SA, Kamble UV, Badami PS. Antimicrobial and DNA Cleavage Studies of New N2O2Diazadioxa Macrocyclic Schiff Base Co(II), Ni(II) and Cu(II) Complexes Containing Triazole Head Unit: Synthesis and Spectroscopic Approach. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2010. [DOI: 10.1080/10601321003741883] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Patil SA, Kamble UV, Badami PS. Template synthesis, characterization,in vitroantimicrobial, and DNA cleavage studies of Co(II), Ni(II), Cu(II), and Zn(II) complexes with 15-membered N2O2diazadioxa macrocycles. MAIN GROUP CHEMISTRY 2009. [DOI: 10.1080/10241220903154583] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Shanker K, Reddy PM, Rohini R, Ho YP, Ravinder V. Encapsulation of Pd(II) by N4 and N2O2 macrocyclic ligands: their use in catalysis and biology. J COORD CHEM 2009. [DOI: 10.1080/00958970902980511] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kanne Shanker
- a Department of Chemistry , Kakatiya University , Vidhyaranyapuri, Warangal–506 009, Andhra Pradesh, India
| | - P. Muralidhar Reddy
- b Department of Chemistry , National Dong Hwa University , 1, Sec. 2, Da-Hsueh Rd. Shou-Fend, Hualien, 974, Taiwan
| | - Rondla Rohini
- a Department of Chemistry , Kakatiya University , Vidhyaranyapuri, Warangal–506 009, Andhra Pradesh, India
| | - Yen-Peng Ho
- b Department of Chemistry , National Dong Hwa University , 1, Sec. 2, Da-Hsueh Rd. Shou-Fend, Hualien, 974, Taiwan
| | - Vadde Ravinder
- a Department of Chemistry , Kakatiya University , Vidhyaranyapuri, Warangal–506 009, Andhra Pradesh, India
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Shanker K, Rohini R, Ravinder V, Reddy PM, Ho YP. Ru(II) complexes of N4 and N2O2 macrocyclic Schiff base ligands: their antibacterial and antifungal studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:205-211. [PMID: 19268628 DOI: 10.1016/j.saa.2009.01.021] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2008] [Revised: 01/09/2009] [Accepted: 01/20/2009] [Indexed: 05/27/2023]
Abstract
Reactions of [RuCl2(DMSO)4] with some of the biologically active macrocyclic Schiff base ligands containing N4 and N2O2 donor group yielded a number of stable complexes, effecting complete displacement of DMSO groups from the complex. The interaction of tetradentate ligand with [RuCl2(DMSO)4] gave neutral complexes of the type [RuCl2(L)] [where L=tetradentate macrocyclic ligand]. These complexes were characterized by elemental, IR, 1H, 13C NMR, mass, electronic, thermal, molar conductance and magnetic susceptibility measurements. An octahedral geometry has been proposed for all complexes. All the macrocycles and macrocyclic Ru(II) complexes along with existing antibacterial drugs were screened for antibacterial activity against Gram +ve (Bacillus subtilis, Staphylococcus aureus) and Gram -ve (Escherichia coli, Klebsiella pneumonia) bacteria. All these compounds were found to be more active when compared to streptomycin and ampicillin. The representative macrocyclic Schiff bases and their complexes were also tested in vitro to evaluate their activity against fungi, namely, Aspergillus flavus and Fusarium species.
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Affiliation(s)
- Kanne Shanker
- Department of Chemistry, Kakatiya University, Warangal, AP, India
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Bagihalli GB, Patil SA. Synthesis, spectral characterization, in vitro biological and DNA cleavage studies of Co(II), Ni(II), Cu(II), and Zn(II) complexes with 1,2,4-triazole Schiff bases. J COORD CHEM 2009. [DOI: 10.1080/00958970802668851] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Sangamesh A. Patil
- a P.G. Department of Chemistry , Karnatak University , Dharwad, Karnataka, India
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Neelakantan MA, Rusalraj F, Dharmaraja J, Johnsonraja S, Jeyakumar T, Sankaranarayana Pillai M. Spectral characterization, cyclic voltammetry, morphology, biological activities and DNA cleaving studies of amino acid Schiff base metal(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 71:1599-1609. [PMID: 18656419 DOI: 10.1016/j.saa.2008.06.008] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Revised: 05/07/2008] [Accepted: 06/10/2008] [Indexed: 05/26/2023]
Abstract
Metal complexes are synthesized with Schiff bases derived from o-phthalaldehyde (opa) and amino acids viz., glycine (gly) l-alanine (ala), l-phenylalanine (pal). Metal ions coordinate in a tetradentate or hexadentate manner with these N(2)O(2) donor ligands, which are characterized by elemental analysis, molar conductance, magnetic moments, IR, electronic, (1)H NMR and EPR spectral studies. The elemental analysis suggests the stoichiometry to be 1:1 (metal:ligand). Based on EPR studies, spin-Hamiltonian and bonding parameters have been calculated. The g-values calculated for copper complexes at 300K and in frozen DMSO (77K) indicate the presence of the unpaired electron in the dx2-y2 orbital. The evaluated metal-ligand bonding parameters showed strong in-plane sigma- and pi-bonding. X-ray diffraction (XRD) and scanning electron micrography (SEM) analysis provide the crystalline nature and the morphology of the metal complexes. The cyclic voltammograms of the Cu(II)/Mn(II)/VO(II) complexes investigated in DMSO solution exhibit metal centered electroactivity in the potential range -1.5 to +1.5V. The electrochemical data obtained for Cu(II) complexes explains the change of structural arrangement of the ligand around Cu(II) ions. The biological activity of the complexes has been tested on eight bacteria and three fungi. Cu(II) and Ni(II) complexes show an increased activity in comparison to the controls. The metal complexes of opapal Schiff base were evaluated for their DNA cleaving activities with calf-thymus DNA (CT DNA) under aerobic conditions. Cu(II) and VO(II) complexes show more pronounced activity in presence of the oxidant.
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Affiliation(s)
- M A Neelakantan
- Chemistry Research Centre, National Engineering College, K.R. Nagar, Kovilpatti 628 503, Thoothukudi District, Tamil Nadu, India.
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Reddy PM, Prasad AVSS, Rohini R, Ravinder V. Catalytic reduction of pralidoxime in pharmaceuticals by macrocyclic Ni(II) compounds derived from orthophthalaldehyde. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:704-712. [PMID: 18068425 DOI: 10.1016/j.saa.2007.10.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Revised: 09/29/2007] [Accepted: 10/15/2007] [Indexed: 05/25/2023]
Abstract
Efficient catalytic method for the reduction of pralidoxime to its amine derivative by macrocyclic Ni(II) compounds has been developed. Ten macrocyclic Schiff base Ni(II) compounds were synthesized via non-template synthesis by treating the corresponding macrocycles with nickel chloride in 1:1 ratio. The resulting compounds were characterized by elemental, IR, (1)H NMR, (13)C NMR, mass, electronic spectra, conductance, magnetic, thermal studies and their structures have been proposed. These compounds were used as catalysts for the reduction of pralidoxime to its amino derivative. The reduced pralidoxime was also characterized by spectral analysis and catalytic cycle has been established. The reduced product was determined spectrophotometrically by treating with ninhydrin reagent and the percent yields were found to be in the range of 75.12-82.36%.
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Coordination behaviour of Schiff base 2-acetyl-2-thiazoline hydrazone (ATH) towards cobalt(II), nickel(II) and copper(II). Polyhedron 2008. [DOI: 10.1016/j.poly.2007.11.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Reddy PM, Prasad AVSS, Reddy CK, Ravinder V. Synthesis of new macrocyclic rhodium(III) compounds and their utility as catalysts for the oxidation of ascorbic acid. TRANSIT METAL CHEM 2007. [DOI: 10.1007/s11243-007-9037-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Reddy PM, Prasad AVSS, Shanker K, Ravinder V. Synthesis, spectral studies and antibacterial activity of novel macrocyclic Co(II) compounds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 68:1000-6. [PMID: 17553737 DOI: 10.1016/j.saa.2007.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2006] [Accepted: 03/06/2007] [Indexed: 05/15/2023]
Abstract
Ten novel macrocyclic Co(II) compounds have been synthesized by treating four N(4) and six N(2)O(2) donor macrocycles with cobalt chloride in methanol. These compounds were characterized by elemental, IR, (1)H, (13)C NMR, mass, electronic spectral analysis, molar conductance and magnetic susceptibility measurements. Thermal behavior of these compounds has been studied by the thermogravimetric analysis. An octahedral geometry has been proposed for all of these complexes. All the macrocycles and macrocyclic Co(II) compounds along with existing antibacterial drugs were screened for antibacterial activity against Gram +ve and Gram -ve bacteria. All these compounds were found to be more active when compared to streptomycin and ampicillin.
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Reddy PM, Prasad AVSS, Ravinder V. Synthesis, spectral characterization, catalytic and antibacterial activity of macrocyclic CuII compounds. TRANSIT METAL CHEM 2007. [DOI: 10.1007/s11243-007-0205-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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