scholarly journals Synthesis of ruthenium(II) carbonyl complexes with 2-monosubstituted and 1,2-disubstituted benzimidazoles

2009 ◽  
Vol 74 (10) ◽  
pp. 1085-1096 ◽  
Author(s):  
Naik Krishnamurthy ◽  
Narashimaiah Shashikala
Keyword(s):  
Elemental Analysis ◽  
13C Nmr ◽  
Spectral Studies ◽  
Carbonyl Complex ◽  
Carbonyl Complexes ◽  
Conductivity Measurements ◽  
1H And 13C Nmr

The reaction of the polymeric carbonyl complex [RuCl2(CO)2]x with 2-monosubstituted and 1,2-disubstituted benzimidazoles and 1,4-bis(benzimidazol- 2-yl)benzene (L9) in 2-methoxyethanol produces various coloured complexes of the formulae [Ru(CO)2Cl2(L)2]?xH2O (L = 1-(o-hydroxybenzyl)-2-(o-hydroxyphenyl)benzimidazole (L1), 1-(o-hydroxyphenyl)benzimidazole (L4), 1-(p-hydroxyphenyl)benzimidazole (L5), 1-(p-chlorobenzyl)-2-p-chlorophenyl) benzimidazole (L7), 1-[1-(dimethylamino)benzyl]-2-[1-(dimethylamino) phenyl]benzimidazole (L10), x = 0; L = 2-benzylbenzimidazole (L8), 1,4-bis(benzimidazol-2-yl)benzene (L9), x = 2; L = 1-(o-chlorobenzyl)-1-(o-chlorophenyl)benzimidazole (L6); x = 3), [Ru(CO)2Cl(L2)3]Cl?3H2O and [Ru(CO)2(L3)4]Cl2?3H2O (L2 = 1-(m-hydroxybenzyl)-2-(m-hydroxyphenyl)- benzimidazole; L3 = 1-(p-hydroxybenzyl)-2-(p-hydroxyphenyl)benzimidazole). The complexes were characterized by elemental analysis, conductivity measurements, as well as infrared, electronic, 1H- and 13C-NMR spectral studies.

scholarly journals Synthesis and Characterization of 1-phenyl-3-methyl-4-stearoylpyrazol-5-one and Its Lanthanum(III) and Tungsten(VI) Complexes

2020 ◽  
pp. 140-151
Author(s):  
A. I. C. Ehirim ◽  
C. K. Enenebeaku ◽  
C. Asimole ◽  
M. O. C. Ogwuegbu ◽  
E. N. O. Ejike
Keyword(s):  
Elemental Analysis ◽  
13C Nmr ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Melting Points ◽  
1H And 13C Nmr ◽  
Solubility Profile ◽  
Uv Visible ◽  
Metal Ligand

The ligand, 1-phenyl-3-methyl-4-stearoylpyrazol-5-one (HSPy), and its La(III) and W(VI) complexes were synthesized and characterized spectroscopically using elemental analysis, UV-visible, IR, 1H and 13C NMR. Physical properties such as colour, melting points, conductivity measurements and solubility profile were also investigated. La(III) and W(VI) reacted with the ligand in the metal-ligand mole ratios of 1:3 and 1:2 to form neutral complexes of diaquo-trischelate La(SPy)3.2H2O and dioxoaquo-bischelate, WO2(SPy)2.H2O respectively.

scholarly journals Synthesis of the Guanidine Derivative: N-{[(7-(4,5-Dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene)amino](phenylamino)methylene}benzamide

Molbank ◽  
10.3390/m1246 ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. M1246
Author(s):  
Łukasz Balewski ◽  
Anita Kornicka
Keyword(s):  
Infrared Spectroscopy ◽  
Elemental Analysis ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Guanidine Derivative

The guanidine derivative N-{[(7-(4,5-dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene)amino](phenylamino)methylene}benzamide (3) has been obtained by the reaction of one measure of N-{[7-(4,5-dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene]carbamothioyl}benzamide (2) with one measure of aniline in the presence of mercury(II) chloride and triethylamine in anhydrous dimethylformamide. The structure of product 3 was confirmed by 1H and 13C-NMR, infrared spectroscopy, and elemental analysis.

scholarly journals Synthesis and spectral characterization of novel 1,5-benzodiazepine oxime derivatives

2019 ◽  
Vol 84 (4) ◽  
pp. 343-353
Author(s):  
Lina Rekovic ◽  
Lidija Kosychova ◽  
Irina Bratkovskaja ◽  
Regina Vidziunaite
Keyword(s):  
Nitrogen Atom ◽  
Fluorescence Spectroscopy ◽  
Organic Solvent ◽  
Elemental Analysis ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Methyl Group ◽  
Oxime Derivatives ◽  
New Compounds

Three new 1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-one oximes were synthesized and characterized by the methods of 1H- and 13C-NMR, IR and elemental analysis. Along with previously described compounds bearing one additional methyl group on the 5th nitrogen atom, the new compounds were characterized in bulk by UV?Vis and fluorescence spectroscopy in various solvents. The influence of the nature of the organic solvent on the spectra of the title compounds was investigated and is discussed.

scholarly journals Organoruthenium(II) thiosemicarbazone complexes: synthesis, spectral characterization, DNA binding and DNA cleavage studies

2013 ◽  
Vol 11 (6) ◽  
pp. 1010-1018 ◽  
Author(s):  
Gunasekaran Raja ◽  
Chinnasamy Jayabalakrishnan
Keyword(s):  
Elemental Analysis ◽  
13C Nmr ◽  
Dna Cleavage ◽  
Spectroscopic Studies ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Cleavage Activity ◽  
Dna Cleavage Activity ◽  
Thiosemicarbazone Complexes ◽  
Ct Dna

AbstractA series of new ruthenium(II) complexes were synthesized with Schiff bases derived from salicylaldehyde / o-hydroxyacetophenone/ o-vanillin / 2-hydroxy-1-naphthaldehyde with thiosemicarbazide and acetyl furan. They are characterized by elemental analysis, IR, electronic, 1H NMR, 13C NMR and mass spectral studies. The elemental analysis suggests the stoichiometry to be 1:1 (metal:ligand). Four of these complexes were tested for its binding with CT-DNA using absorption spectroscopic studies and two of these complexes exhibit efficient DNA cleavage activity.

scholarly journals Regioselective Three Component Domino Synthesis of Polyhydrospiro[indoline-3,3'-pyrrolizine]-2-one via [3+2] Cycloaddition Reaction

2019 ◽  
Vol 31 (3) ◽  
pp. 613-616
Author(s):  
Vishwa Deepak Tripathi ◽  
Akhilesh Kumar Shukla ◽  
Hasan Shamran Mohammed
Keyword(s):  
Ir Spectra ◽  
Multicomponent Reaction ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Mass Spectra ◽  
Room Temperature ◽  
Cycloaddition Reaction ◽  
Synthetic Chemistry ◽  
1H And 13C Nmr ◽  
Orbital Interactions

In present work, we have reported the synthesis and characterisation of novel hexahydrospiro[indoline-3,3′-pyrrolizine]-2-one derivatives in good to excellent yields via [3+2] cycloaddtion reaction in regioselective manner. These compounds were synthesized via multicomponent reaction of substituted 3-cinnamoyl-4-hydroxy-6-methyl-2H-pyran-2-one, isatin, L-proline at room temperature. All the synthesized hexahydrospiro molecules were characterized by 1H and 13C NMR, IR spectra, mass spectra and elemental analysis. Regioselectivity in synthesized molecules were also explained on the basis of secondary orbital interactions. A simple and facile methodology is developed which has great importance in synthetic chemistry.

ChemInform Abstract: 2,4-Dihalogenoquinolines. Synthesis, Orientation Effects and 1H and 13C NMR Spectral Studies.

ChemInform ◽  
2010 ◽  
Vol 25 (8) ◽  
pp. no-no
Author(s):  
A. G. OSBORNE ◽  
J. M. BULEY ◽  
H. CLARKE ◽  
R. C. H. DAKIN ◽  
P. I. PRICE
Keyword(s):  
13C Nmr ◽  
Spectral Studies ◽  
1H And 13C Nmr ◽  
Orientation Effects

scholarly journals Synthesis and Styrene Copolymerization of New Halogen and Methoxy Ring-Trisubstituted Propyl Cyanophenylpropenoates

2019 ◽  
Vol 11 (2) ◽  
pp. 60
Author(s):  
Yesenia L. Soto ◽  
Emily A. Baumgartner ◽  
Francesca R. Bertoletti ◽  
Ellen F. Gardner ◽  
Bridget M. Hofsteadter ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
13C Nmr ◽  
Knoevenagel Condensation ◽  
Radical Initiation ◽  
1H And 13C Nmr

New ring-trisubstituted propyl cyanophenylpropenoates, RPhCH=C(CN)CO2C3H7 (where R is 2-bromo-3-hydroxy-4-methoxy, 5-bromo-2,3-dimethoxy, 5-bromo-2,4-dimethoxy, 6-bromo-3,4-dimethoxy, 2-chloro-3,4-dimetoxy, 5-chloro-2,3-dimetoxy, 4-bromo-2,6-difluoro, 3-chloro-2,6-difluoro, 4-chloro-2,6-difluoro) were prepared by the piperidine catalyzed Knoevenagel condensation of ring-trisubstituted benzaldehydes and propyl cyanoacetate and characterized by CHN elemental analysis, IR, 1H and 13C-NMR. The propenoates formed copolymers with styrene in solution with radical initiation (ABCN) at 70°C. The copolymers were characterized by nitrogen elemental analysis, IR, 1H and 13C-NMR, DSC. Decomposition of the copolymers in nitrogen (TGA) occurred in two steps, first in the 200-500ºC range with residue (4.2 -8.1% wt.), which then decomposed in the 500-800ºC range.

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