Synthesis and magnetic properties of polymeric complexes containing ruthenium(II)-ruthenium(III) tetracarboxylato units linked by cyanato, thiocyanato, and selenocyanato ligands

2008 ◽  
Vol 62 (4) ◽  
Author(s):  
Makoto Handa ◽  
Hideaki Ishida ◽  
Kayoko Ito ◽  
Toshihiro Adachi ◽  
Takahisa Ikeue ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
1H Nmr ◽  
Nmr Spectra ◽  
Diffuse Reflectance ◽  
Magnetic Susceptibilities ◽  
Diffuse Reflectance Spectra ◽  
Main Species ◽  
Elemental Analyses ◽  
Polymeric Species ◽  
Polymeric Complexes

AbstractPolymeric complexes of ruthenium(II)-ruthenium(III) tetracarboxylato units linked by cyanato, thiocyanato, and selenocyanato ligands [Ru2{O2C(CH2)mCH3}4(L)]n (m = 0, 4–7; L = OCN−, SCN−, and SeCN−) were prepared and characterized based on the elemental analyses, IR, and diffuse reflectance spectra. Magnetic susceptibilities were measured at the temperature range of 4.5 K to 300 K, where the interdimer antiferromagnetic interactions were revealed. The strongest interaction was exhibited in case of m = 7 and L = OCN−. 1H-NMR spectra of [Ru{O2C(CH2)7CH3}4(SCN)]n in CD2Cl2 showed broad signals which can be ascribed to polymeric species, as the addition of tetrabutylammonium thiocyanate caused sharper signals due to the formation of [Ru2{O2C(CH2)7CH3}4(SCN)2]− adduct as the main species in the solution.

A Facile Synthesis and Reactions of Some Novel Pyrazole-based Heterocycles

2019 ◽  
Vol 16 (3) ◽  
pp. 405-412 ◽  
Author(s):  
Ahmed A.O. Abeed ◽  
Talaat I. El-Emary ◽  
Mohamed S.K. Youssef
Keyword(s):  
1H Nmr ◽  
High Performance ◽  
Nmr Spectra ◽  
Melting Points ◽  
Facile Synthesis ◽  
Direct Titration ◽  
Elemental Analyses ◽  
Ft Ir ◽  
Active Methylene ◽  
Pyrazoline Derivative

<p>Aim and Objective: This work presents the synthetic capability and the exploitation of 1,3-diphenyl- 1H-pyrazole-4-carboxladehyde 1 and 5-diphenyl pyrazolyl-2-pyrazoline analogue 8 to serve as excellent precursors for the synthesis of substituted indol-2,3-dione, trizolo[3,4-a]benzazoles, thiazolo[2,3- a]benzimidazole-3-one, substituted 2-pyrazoline and pyrazole-substituted-pyrazolines using various reagents. </P><P> Materials and Methods: Using chemicals from Aldrich, Fluka, or Merck, and pure solvents, we apply the synthetic procedures for the synthesis of novel heterocycles. The melting points of these compounds were determined using APP. Digital ST 15 melting point apparatus. SP3-100 spectrophotometer recorded FT-IR spectra (KBr) (cm-1). NMR spectra (&#948;, ppm) were recorded on 400 MHz AVANCE-III High-Performance FT-NMR Spectrometer BRUCKER (Switzerland) and some 1H NMR spectra were recorded on Varian EM-360L NMR Spectrophotometer (90 MHz) (USA) in CDCl3 or DMSO-d6 as a solvent. Elemental analyses were carried out at a Vario EL C, H, N, and S Analyzer. Bromine was determined using direct titration method after carius combustion. </P><P> Results: The structures of the compounds were confirmed by IR, 1H NMR, 13C NMR, and elemental analyses. </P><P> Conclusion: 1,3-Diphenyl-1H-pyrazole-4-carboxladehyde 1 and 2-pyrazoline derivative 9 confirmed their importance in the synthetic organic chemistry. Depending on the formyl group of aldehyde 1 and active methylene of pyrazoline 8, we synthesized new series of heterocycles; indol-2,3-dione, trizolo[3,4-a]benzazole, thiazolo[2,3-a]benzimidazole-3-one and pyrazolyl-pyrazoline derivatives expecting their pharmacological applications. The targeted compounds were substantiated from its spectral data.</p>

scholarly journals CHARACTERISATION OF Fe(III), Co(II), Ni(II) AND Cu(II) COMPLEXES OF SALICYLSALICYCLICACID HYDRAZONE BY PHYSICO-CHEMICAL METHODS

2011 ◽  
Vol 08 (16) ◽  
pp. 6-16
Author(s):  
Srilalitha VINNAKOTA ◽  
Raghavendra Guru Prasad ALURU ◽  
Ramana Kumar KAKARLA ◽  
Seshagiri VAHI ◽  
RAO KRISHNA RAO Ravindranath LAXMAN
Keyword(s):  
Thermal Analysis ◽  
Metal Ions ◽  
1H Nmr ◽  
Magnetic Moment ◽  
Nmr Spectra ◽  
Molar Conductivity ◽  
1H Nmr Spectra ◽  
Chemical Methods ◽  
Physico Chemical ◽  
Elemental Analyses

The complexes of Fe(III), Co(II), Ni(II) and Cu(II) with salicylsalicyclicacid hydrazone (SSAH) were synthesized. The ligand and the complexes were characterized by elemental analyses, UV-Vis, IR and 1H NMR spectra, as well as by thermal analysis, molar conductivity and magnetic moment measurements. The tentative geometry of the complexes was proposed in each case and it was proposed that the metal ions under study form 1:1 complex with the ligand.

Synthesis of 2,2`-(1,4-Phenylene)bis-3,4-dihydro-2H-1,3-thiazin-4-ones and their Facile Recyclization to 2,2`-(1,4-Phenylene)bis(pyrimidin-4-one) and/or 2,2`-(1,4-Phenylene)-bis-(thieno[2,3-d]pyrimidin-4(1H)-one) Derivatives

2010 ◽  
Vol 65 (9) ◽  
pp. 1148-1154 ◽  
Author(s):  
Raafat M. Shaker ◽  
Yusria R. Ibrahim ◽  
Fathy F. Abdel-Latif ◽  
Asmaa Hamoda
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Nmr Spectra ◽  
13C Nmr Spectra ◽  
Elemental Analyses

An efficient and direct procedure for the synthesis of 2,2`-(1,4-phenylene)bis-3,4-dihydro-2H-1,3- thiazin-4-one derivatives is described. Oxidation of the latter and their base-catalyzed recyclization has been studied. The products were characterized by elemental analyses, and IR, 1H NMR, and 13C NMR spectra.

Binding of Cations to 4f Metal Ions : Preparation and Properties of Lanthanide(III) Complexes Containing the Phenelzinium(1+) Cation as a Ligand

1996 ◽  
Vol 51 (1) ◽  
pp. 112-118 ◽  
Author(s):  
Nickolia Lalioti ◽  
John M. Tsangaris ◽  
Th. F. Zafiropoulos ◽  
Spyros P. Perlepes
Keyword(s):  
Solid State ◽  
Metal Ions ◽  
General Formula ◽  
Diffuse Reflectance ◽  
Thermal Methods ◽  
Magnetic Susceptibilities ◽  
X Ray ◽  
Polymeric Complexes

Abstract Treatment of Ln2(SO4)3·nH2O (Ln = La, Ce, Pr, Nd, Sm. Eu, Gd ; n = 8, 9) with phenelzine dihydrogen sulfate, (phzH2) SO4, in 1N H2SO4 yields polymeric complexes with the general formula [Ln(SO4)2(H2O)2(phzH)], which contain the phzH+ cation as a ligand. The compounds have been characterized by elem ental analyses, X-ray powder patterns, thermal methods, magnetic susceptibilities and spectroscopic (IR, Raman, electronic diffuse reflectance and solid-state emission f-f spectra) studies. The prepared complexes most probably consist of 7-coordinated units, formed by four bridging bidentate sulfato groups, two terminal aqua molecules and one cationic phzH+ ligand.

Template Synthesis of Co(II) Complexes of Tetraazamacrocycles

1992 ◽  
Vol 47 (12) ◽  
pp. 1701-1706 ◽  
Author(s):  
Pramod K. Rai ◽  
Ajay K. Gupta ◽  
Raghu N. Prasad
Keyword(s):  
High Spin ◽  
Template Synthesis ◽  
Diffuse Reflectance ◽  
Magnetic Measurements ◽  
Membered Ring ◽  
Reflectance Spectra ◽  
Diffuse Reflectance Spectra ◽  
Elemental Analyses ◽  
Aliphatic Diamines

2+2 Cyclocondensation of benzil with aliphatic diamines viz. 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane, 1,6-diaminohexane, 1,8-diaminooctane or 1,12-diaminododecane in the presence of Co(II) as a template yields a series of pentacoordinated high spin Co(II) complexes of the type [CoLX]X (where L = N4 macrocycle having 12- to 32-membered ring and X = NO3, Cl). The complexes have been characterized by elemental analyses, IR and diffuse reflectance spectra, conductances and magnetic measurements.

Synthesis and Antimicrobial Evaluation of Some Novel Pyrimidine, Pyrazole, Chromene and Tetrahydrobenzo[b]thiophene Derivatives Bearing Pyrimidinthione Moiety

2020 ◽  
Vol 17 (7) ◽  
pp. 548-557
Author(s):  
Mohamed Ahmed Mahmoud Abdel Reheim ◽  
Ibrahim Saad Abdel Hafiz ◽  
Mohamed Ahmed Elian
Keyword(s):  
1H Nmr ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Bacterial Biofilm ◽  
1H Nmr Spectra ◽  
Internal Reference ◽  
Aluminum Sheets ◽  
Elemental Analyses ◽  
Antimicrobial Evaluation ◽  
Thiophene Derivatives

Aim and Objective: A novel collection of fused pyrimidine, pyridine, pyrazole, chromene and thiophene derivatives 2-30 have been newly synthesized by using the 1a, b as starting material. Fused pyrane exhibits a range of pharmacological activity such as cancer agents [1], antimicrobial [2-4], antioxidant [5], antiproliferative [6], cytotoxic activity [7], anticipated antitumor [8], antiparkinsonian [9] and anti-inflammatory [10]. Moreover, pyrane derivatives are well known for bacterial biofilm disruptor [11], anticonvulsant [12] and inhibitors of mycobacterium bovis [13]. Materials and Methods: All melting points were measured using the Akofler Block instrument and are uncorrected. IR spectra (KBr) were recorded on a FTIR 5300 spectrometer (υ, cm-1). The 1H-NMR spectra were recorded on a Varian Gemini spectrometer. The 1H-NMR spectra were run at 300, 400 MHz and 13C-NMR spectra were run at 100 MHz in DMSO-d6, CDCl3 as solvents. The chemical shifts are expressed in parts per million (ppm) by using tetramethylsilane (TMS) as an internal reference, 1000 EX mass spectrometer at 70 eV. The purity of synthesized compounds was checked by thin-layer chromatography (TLC) (aluminum sheets) using nhexane, EtOAc (9:1, V/V, 7:3 V/V) eluent. Elemental analyses were carried out by the Microanalytical Research Center, Faculty of Science, and Microanalytical Unit, Faculty of Pharmacy, Cairo University, Egypt. Results and Discussion: A novel series of azoles and azines were designed and prepared via the reaction of 7-amino- 5-(4-chlorophenyl)-4-phenyl-2-thioxo-2,5-dihydro-1H-pyrano- [2,3-d]pyrimidine-6-carbonitrile 1a and 7-amino-4,5- diphenyl-2-thioxo-2,5-dihydro-1H-pyrano[2,3-d]-pyrimidine-6-carbonitrile 1b with some electrophilic and nucleophilic reagents. The structures of target compounds were confirmed by elemental analyses and spectral data. The novel synthesized compounds showed good antimicrobial activity against the previously mentioned microorganisms. Conclusion: In conclusion, compounds 1a, 1b underwent ready cyclization to give fused heterocyclic compounds through reaction with different reagents and under different conditions and subjected to antimicrobial screening.

scholarly journals One pot synthesis of Biginelli 3,4-dihydro-1H-pyrimidin-2-ones and 1,2,3,4-tetrahydro pyrimidines

2020 ◽  
Vol 55 (3) ◽  
pp. 173-180
Author(s):  
Md E Halim ◽  
K Akhter ◽  
SM Ahmed ◽  
Md Al Amin Hossain ◽  
UKR Romman
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Ethyl Acetoacetate ◽  
Nmr Spectra ◽  
13C Nmr Spectra ◽  
One Pot ◽  
One Pot Synthesis ◽  
Elemental Analyses ◽  
Cyclocondensation Reaction ◽  
Anhydrous Zncl2

A simple and practical route for the Biginelli cyclocondensation reaction using anhydrous ZnCl2 as a catalyst in n-heptane-toluene medium by reaction of substituted benzaldehydes,1a-d (1a=2-ClC6H4-, 1b=2-BrC6H4- and 1c=4-ClC6H4-,1d=2-H3CC6H4-) with 1, 3-dicarbonyl compounds, 2a-b (2a= ethyl acetoacetate and 2b= acetylacetone) and urea or thiourea, 3a-b to give the corresponding Biginelli 3,4-dihydro- 1H-pyrimidin-2-ones and 1,2,3,4-tetrahydro pyrimidines, 4a-d. The structures of the compounds 4a-d were confirmed by their ultraviolet, infrared, 1H NMR, 13C NMR spectra and elemental analyses. Bangladesh J. Sci. Ind. Res.55(3), 173-180, 2020

scholarly journals Coordination Polymers ofN,Nʼ-di-(8-Hydroxyquinolinolyl- 5-methyl)-N,N-diethyl-1,3-propane diamine (QEPD)

2010 ◽  
Vol 7 (3) ◽  
pp. 1023-1028 ◽  
Author(s):  
Asha D. Patel ◽  
Rignesh S. Patel ◽  
Ganpat R. Patel
Keyword(s):  
Thermal Stability ◽  
Coordination Polymers ◽  
Diffuse Reflectance ◽  
Bidentate Ligand ◽  
Spectral Studies ◽  
The Novel ◽  
Magnetic Susceptibilities ◽  
Molecular Weights ◽  
Elemental Analyses ◽  
Parent Ligand

Coordination polymers containing a novel bis(oxine) bidentate ligand, namelyN,Nʼ-di(8-hydroxyquinolinolyl-5-methyl)-N,Nʼ-diethyl-1,3-propane diamine (QEPD) have been prepared with the metal ions Zn(II), Cu(II), Ni(II), Co(II) and Mn(II). The novel bis-(bidentate) ligand was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride withN,Nʼ-diethyl-1,2- propane diamine in the presence of a base catalyses. All of these coordination polymers and the parent ligand were characterized by elemental analyses, IR spectral and diffuse reflectance spectral studies. The thermal stability and number- average molecular weights (Mn¯) of all of the coordination polymers were determined by thermogravimetric analyses and non-aqueous conductometric titrations, respectively. In addition, all of the coordination polymers have been characterized by their magnetic susceptibilities.

Benzimidazole Derivatives as Potential Antimicrobial and Antiulcer Agents: A Mini Review

2019 ◽  
Vol 19 (16) ◽  
pp. 1292-1297 ◽  
Author(s):  
Ali Mohd Ganie ◽  
Ayaz Mahmood Dar ◽  
Fairooz Ahmad Khan ◽  
Bashir Ahmad Dar
Keyword(s):  
Cell Lines ◽  
Cancer Cell ◽  
1H Nmr ◽  
13C Nmr ◽  
Benzimidazole Derivatives ◽  
Spectroscopic Techniques ◽  
One Pot ◽  
Biological Screening ◽  
Elemental Analyses ◽  
Characterization Studies

:Here in we report the number of strategies for the synthesis of differently substituted benzimidazole derivatives. The protocols involved in the syntheses of these derivatives were one-pot or multi-component. The characterization studies of these derivatives were carried by using different spectroscopic techniques (1H NMR, 13C NMR and MS) and elemental analyses. The biological screening studies revealed that these benzimidazole derivatives show potential antibacterial as well as antifungal behavior. These benzimidazole derivatives not only depicted potential antiulcer properties but also showed moderate to good anticancer/cytotoxic behavior against different cancer cell lines.

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