scholarly journals Synthesis, Spectroscopic, and Theoretical Study of Copper and Cobalt Complexes with Dacarbazine

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3274
Author(s):  
Grzegorz Świderski ◽  
Ryszard Łaźny ◽  
Michał Sienkiewicz ◽  
Monika Kalinowska ◽  
Renata Świsłocka ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Alkylating Agents ◽  
Imidazole Ring ◽  
Spectroscopic Properties ◽  
Electronic Charge ◽  
Dft Methods ◽  
3D Metal Complexes ◽  
Homo And Lumo ◽  
Ft Ir ◽  
Thermal Stability Of

Dacarbazine (DAC) 5-(3,3-dimethyl-1-triazenyl)imidazole-4-carboxamide is an imidazole-carboxamide derivative that is structurally related to purines. DAC belongs to the triazene compounds, which are a group of alkylating agents with antitumor and mutagenic properties. DAC is a non-cell cycle specific drug, active in all phases of the cellular cycle. In the frame of this work the 3d metal complexes (cobalt and copper) with dacarbazine were synthesized. Their spectroscopic properties by the use of FT-IR, FT-Raman, and 1HNMR were studied. The structures of dacarbazine and its complexes with copper(II) and cobalt(II) were calculated using DFT methods. The effect of metals on the electronic charge distribution of dacarbazine was discussed on the basis of calculated NBO atomic charges. The reactivity of metal complexes in relation to ligand alone was estimated on the basis of calculated energy of HOMO and LUMO orbitals. The aromaticity of the imidazole ring in dacarbazine and the complexes were compared (on the basis of calculated geometric indices of aromaticity). Thermal stability of the investigated 3d-metal complexes with dacarbazine and the products of their thermal decomposition were analyzed.

scholarly journals Synthesis, Spectroscopic, Calculated and Thermal Study of Copper and Cobalt Complexes with Dacarbazine

2021 ◽  
Author(s):  
Grzegorz Świderski ◽  
Ryszard Łaźny ◽  
Michał Sienkiewicz ◽  
Monika Kalinowska ◽  
Renata Świsłocka ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Alkylating Agents ◽  
Imidazole Ring ◽  
Spectroscopic Properties ◽  
Electronic Charge ◽  
Dft Methods ◽  
3D Metal Complexes ◽  
Homo And Lumo ◽  
Ft Ir ◽  
Thermal Stability Of

: Dacarbazine, DAC, 5-(3,3-dimethyltriazeno)imidazol-4-carboxamideis is an imidazole-carboxamide derivative, that is structurally related to purines. DAC belongs to the triazene compounds, which are a group of alkylating agents with antitumour and mutagenic properties. DAC is a non-cell cycle specific drug, active on all phases of cellular cycle. In the frame of this work the 3d-metal complexes (cobalt and copper) with dacarbazine were synthesized. Their spectroscopic properties by the use of FT-IR, FT-Raman and 1HNMR were studied. The structures of dacarbazine and its complexes with copper(II) and cobalt(II) were calculated using DFT methods. The effect of metals on the electronic charge distribution of dacarbazine was discussed on the basis of calculated NBO atomic charges. The reactivity of metal complexes in relation to ligand alone was estimated on the basis of calculated energy of HOMO and LUMO orbitals. The aromaticity of imidazole ring in dacarbazine and the complexes was compared (on the basis of calculated geometric indices of aromaticity). Thermal stability of the investigated 3d-metal complexes with dacarbazine and the products of their thermal decomposition were analyzed.

scholarly journals Synthesis, characterization and spectroscopic properties of some 2-substituted 1,3-indandiones and their metal complexes

2009 ◽  
Vol 7 (3) ◽  
pp. 429-438 ◽  
Author(s):  
Anife Ahmedova ◽  
Vasil Atanasov ◽  
Petja Marinova ◽  
Neyko Stoyanov ◽  
Mariana Mitewa
Keyword(s):  
Metal Complexes ◽  
Optical Sensors ◽  
Metal Ion ◽  
Spectroscopic Properties ◽  
Mass Spectral Fragmentation ◽  
Enolic Form ◽  
1H And 13C Nmr ◽  
Mass Spectral ◽  
Elemental Analyses ◽  
Ft Ir

AbstractNew 2-acyl-1,3-indandione derivatives, compounds 1–4, were obtained by condensation of 2-acetyl-1,3-indandione with benzaldehyde, thiophene-2-aldehyde, thiophene-3-aldehyde and furane-2-aldehyde, respectively. The structures of the newly synthesized 2-substituted 1,3-indandiones were characterized by means of spectroscopic methods (FT-IR, 1H and 13C NMR, UV-Vis and MS). Based on the obtained results it is suggested that the compounds exist in the exocyclic enolic form. Mass spectral fragmentation paths are also proposed. In order to verify the possibility for tautomerization processes of the newly synthesized compounds their absorption spectra were recorded in various solvents. Furthermore, the complexation properties of the compounds with metal(II) ions were also studied. A series of non-charged complexes with Cu(II), Cd(II), Zn(II), Co(II) and Ni(II) was isolated and analyzed by elemental analyses and IR. The paramagnetic Cu(II) complexes were studied by EPR and distorted, flattened tetrahedral structures are predicted. The other metal complexes show the presence of water molecules, most probably coordinated to the metal ion, thus forming octahedral geometry. Ultimately, the studied properties of the newly synthesized compounds, 1–4, suggest that they may find application as extracting agents for metal ions, rather than as optical sensors.

scholarly journals Synthesis, characterization and antimicrobial evaluations of mixed ligand complexes of sulphamethaxole and metronidaxole with some transistion metals (Zn, Co, Cu and Fe) in water methanol medium

2021 ◽  
Vol 9 (8) ◽  
pp. 13-23
Author(s):  
Suleiman A. Olagboye ◽  
Blessing John Bamisaye ◽  
Jerome Femi Adesugba
Keyword(s):  
Metal Complexes ◽  
Bacterial Infections ◽  
Copper Complexes ◽  
Free Ligand ◽  
Spectroscopic Properties ◽  
Percentage Yield ◽  
Antibiotics Use ◽  
Ft Ir ◽  
Uv Visible ◽  
Antibacterial And Antifungal

Sulfamethoxazole and metronidazole are antibiotics use for the treatment of various bacterial infections. Their use as ligand is very prominent in formation of metal complexes. The transition metal complexes are synthesized by reaction of Sulfamethoxazole and metronidazole with metals such Mn(II), Cu(II), Fe(II) and Ni(II). The synthesized metal complexes are tested as antibacterial and antifungal. The antimicrobial activity of the complexes displays good potency against some microorganism such as Xanthomonas axonopodis, Streptococcus faecalia, Salmonella entrica, Claribacter michiganense, Xanthomonas phaseolin for bacteria and S.roofisii, M.phonoides, C.lindimuthianum for the fungi, it is revealed that all copper complexes show stronger antibacterial activity than the free drugs. The spectroscopic properties of the complexes were investigated using UV/visible and FT-IR which show metal-charge from 3d to 3s transition in which the transition state shows that they are octahedral geometry and their coordination site respectively. Their percentage yield was moderately high and producible. The complexes synthesized have higher inhibitory activities than the free ligand. The drug resistance in microbes is resulting in the incompetence of available drugs to care for the infections. The thermal analysis shows that the complexes are stable.

scholarly journals Benchmarking magnetic and spectroscopic properties on highly stable 3d metal complexes with tuneable bis(benzoxazol-2-yl)methanide ligands

2021 ◽  
Author(s):  
Christina M. Legendre ◽  
Daniel Lüert ◽  
Regine Herbst-Irmer ◽  
Dietmar Stalke
Keyword(s):  
Metal Complexes ◽  
Spectroscopic Properties ◽  
3D Metal Complexes

Two series a and b of 3d metal based complexes 1-4 [MII{(4-R-NCOC6H4)2CH}2], (with M = Mn (1), Fe (2), Co (3), Ni (4) and R = H (a) or Me...

scholarly journals Synthesis, Spectral Studies, and Theoretical Treatment of New Ni(II),and Co(II) Complexes of Bidenetate Ligands 2-Benzamido Benzothiazole ,and 2-Actamido Benzothiazole

2013 ◽  
Vol 10 (3) ◽  
pp. 638-649
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Complexes ◽  
Electronic Spectroscopy ◽  
Conductivity Measurement ◽  
Spectral Studies ◽  
Theoretical Treatment ◽  
Flame Atomic Absorption ◽  
Monomer Structure ◽  
Atomic Absorption Technique ◽  
Homo And Lumo ◽  
Ft Ir

New metal complexes of the ligands 2-benzamido benzothiazole(B1), and 2-actamido benzothiazole(B2) with metal ions Ni(II),and Co(II) were prepared in alcoholic medium. The prepared complexes were characterized by FT-IR and electronic spectroscopy, Magnetic susceptibility, Flame Atomic Absorption technique as well as elemental analysis and conductivity measurement. From the spectral studies, an octahedral monomer structure proposed for Ni(II) complexes, and a tetrahedral monomer structure for Co(II)complexes.Semi-empirical methods (PM3,and ZINDO/1)were carried out to evaluate the heat formation( ?H?f)binding energy(?Eb) and dipole moment(µ)for all metal complexes. Also vibration frequencies, Electrostatic potential, HOMO and LUMO energies for ligands were calculated.

Synthesis, Characterization and Thermal Study of Some Transition Metal Complexes Derived from Quinoxaline-2,3-Dione

2018 ◽  
pp. 209
Author(s):  
Taghreed M. Musa ◽  
Mahmoud Najim A.Al-jibouri ◽  
Bayader Fadhil Abbas
Keyword(s):  
Thermal Stability ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Dsc Analysis ◽  
Visible Spectra ◽  
Elemental Analyses ◽  
Ft Ir ◽  
Uv Visible ◽  
Thermal Stability Of

   The present paper describes the synthesis and structural studies of new transition metal complexes of cobalt(II), nickel(II), copper(II) and cadmium(II) with two bi dentate ligands derived from quinoxaline-2,3-dione. The two ligands were fully identified by elemental analyses, FT-IR, NMR and UV-Visible spectra. The metal complexes of  Co(II), Ni(II), Cu(II) and Cd(II) were isolated in the solid state after reactions of their metal chlorides with the ligands in 2:1 mole ratio. The isolated solid metal complexes were characterized with the help of elemental analyses, NMR, FT-IR and UV-Visible spectra. As well as the thermal stability of the coordinated quinoxaline polymers were tested by TG-DSC analysis and it is found that cleavage of terminal moiety was investigated, the strong coordinated bonds between oxygen donor atoms in L1 while nitrogen donor atoms of quinoxaline ring in the L2 with the metal ions. Furthermore, the thermal stability of cobalt(II), nickel(II), copper(II) and Cd(II) complexes were screened by TG-DSC analysis and the results helped us in the investigation of the proposed structure of the prepared complexes in the formula [M(L)2Cl2].XH2O and [Cd(L)2]Cl2 where L= L1 and L2  ligands derived from quinoxaline-2,3-dione.  

Spectral Investigation on the Growth and Characterization of NLO Crystals of Thiourea Succinic Acid Single Crystal.

2015 ◽  
Vol 2 (2) ◽  
pp. 70-73
Author(s):  
Kannan.P ◽  
Thambidurai.S ◽  
Suresh.N
Keyword(s):  
Single Crystal ◽  
Succinic Acid ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Thermal Stability Of

Growth of optically transparent single crystals of thiourea succinic acid (TUSA) was grown successfully from aqueous solution by slow evaporation technique. The crystal structure was elucidated using the single crystal XRD. The various functional groups and the modes of vibrations were identified by FT-IR spectroscopic analysis. The optical absorption studies indicate that the optical transparency window is quite wide making its suitable for NLO applications. Thermal stability of the crown crystal carried out by TGA-DTA analysis.

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