Comparison between the humic acids characteristics of two andisols of different age by: FT-IR and 1H-NMR spectroscopy and py-FIMS

4,4′-di-tert-butyl-2,2′-bipyridinium trifluoromethanesulfonate was synthesized by stirring 4,4′-di-tert-butyl-2,2′-bipyridine with scandium(III) trifluoromethanesulfonate in acetonitrile, followed by precipitation with diethyl ether. The structure of the new compound was characterized by FT-IR, 1H, 13C{1H} and 19F{1H} NMR spectroscopy and CHN elemental analysis. This is a safe and simple method to obtain mono-protonated bipyridinium trifluoromethanesulfonate without the direct use of trifluoromethanesulfonic acid.

Download Full-text

Comparison of the structures of humic acids from marine sediments and degraded field diatoms by 13C- and 1H-NMR spectroscopy

Marine Chemistry ◽

10.1016/0304-4203(85)90068-4 ◽

1985 ◽

Vol 17 (2) ◽

pp. 115-126 ◽

Cited By ~ 19

Author(s):

E.-L. Poutanen ◽

R.J. Morris

Keyword(s):

Nmr Spectroscopy ◽

1H Nmr ◽

Humic Acids ◽

Marine Sediments ◽

1H Nmr Spectroscopy

Download Full-text

STRUCTURAL STUDY OF COMPLEXES FROM HEXAFLUOROACETYLACETONE, PYRAZOLE, AND ITS PYRAZOLE DERIVATIVE WITH SOME METALS BY FT-IR, AND 1H-NMR

Periódico Tchê Química ◽

10.52571/ptq.v17.n34.2020.780_p34_pgs_756_768.pdf ◽

2020 ◽

Vol 17 (34) ◽

pp. 756-768

Author(s):

Jassim Abas AL-HILFI ◽

Zaidoon Jawad KAHDIM ◽

Tahseen Saddam FANDI ◽

Luma M AHMED

Keyword(s):

Magnetic Susceptibility ◽

Nmr Spectroscopy ◽

Nitrogen Atom ◽

1H Nmr ◽

High Spin ◽

1H Nmr Spectroscopy ◽

Enol Form ◽

Reaction Step ◽

Ft Ir ◽

Mixing Water

The series complex formation nickel(II) or cobalt(III) with hexafluoroacetylacetone, pyrazole, 3,5-dimethylpyrazole, and 3,5-bis(trifluoromethyl)-1H-pyrazole were prepared. The first reaction step included the synthesis of the complex using hexafluoroacetylacetone as a ligand with Co(III) or Ni(II), metals with high spin with π donate and enol-form of the ligand. This formed complex was identified by FT-IR, 1H-NMR spectroscopy, and magnetic susceptibility calculation. Whereas, the second reaction step to produce the complex depended upon mixing water and pyrazole and using it as ligands with Co(III) or Ni(II) a metal, which is a high spin with one donate and the another is aromatic nitrogen atom in a ligand. In the third reaction step, the complexes were produced by mixing water with 3,5-bis(trifluoromethyl)-1H-pyrazole as a ligand with Co(III) or Ni(II) as low spin metal. The analysis of these prepared complexes and their used ligands were done by comparing the results using 1H-NMR and FT-IR spectroscopies. Besides, the magnetic susceptibility calculation was also employed. The results of 1H-NMR spectroscopy and magnetic susceptibility proved that the produced complexes are diamagnetic when the ligand includes the CF3 group. At the same time, the produced complexes are paramagnetic, when the ligand without the CF3 group, which is formed the mixture of water and 3,5-dimethylpyrazole as ligand or water and pyrazole as a ligand with Co(III) or Ni(II) as metal. All the ligands in the paramagnetic complexes were one donate, and another the donated atom in pyrazol is an aromatic nitrogen atom. Therefore all prepared high spin complexes were not evident in the 1H-NMR spectrum because the peaks appear brood that due to high T1 relaxation 1H-NMR time, and the investigation turned out two assignment peaks. This behavior is an attitude to happen the ketone form and enol form phenomenon by using 1H-NMR spectra, and its an evident assignment coupling between hydrogen or carbon atom with a fluorine atom.

Download Full-text

Synthesis and characterization of some heterocyclic including oxazoles,Thiazoles, Pyridazines, phthalizines and Pyrazoles with evaluating of biological activity.

Baghdad Science Journal ◽

10.21123/bsj.10.3.818-827 ◽

2013 ◽

Vol 10 (3) ◽

pp. 818-827

Author(s):

Baghdad Science Journal

Keyword(s):

Acetic Acid ◽

Biological Activity ◽

Nmr Spectroscopy ◽

1H Nmr ◽

1H Nmr Spectroscopy ◽

Acid Hydrazide ◽

Synthesis And Characterization ◽

Ft Ir ◽

New Compounds

A series of new compounds including p-bromo methyl pheno acetate [2]. N-( aminocarbonyl)–p-bromo pheno acetamide [3] , N-( aminothioyl) -p-bromo phenoacetyl amide [4], N-[4-(p-di phenyl)-1,3-oxazol-2-yl]-p-bromopheno acetamide [5],N-[4-p-di phenyl]-1,3-thiazol-2-yl-p-bromo phenoacet amide [6], p-bromopheno acetic acid hydrazide [7] , 1-N-(p-bromo pheno acetyl)-1,2-dihydro-pyridazin-3,6- dione [8], 1-N-(p-bromo pheno acetyl)-1,2-dihydro-phthalazin-3,8- dione[ 9], 1-(p-bromo pheno acetyl)-3-methylpyrazol-5-one [10] and 1-(p-bromo phenol acetyl)- 3,5-dimethyl pyrazole [11] have been synthesized. The prepared compounds were characterized by m.p.,FT-IR and 1H-NMR spectroscopy. Also ,the biological activity was evaluated .

Download Full-text

Synthesis, Characterization of Derivatives Tetrazoles for Trimethoprim Drug

Baghdad Science Journal ◽

10.21123/bsj.13.2.266-274 ◽

2016 ◽

Vol 13 (2) ◽

pp. 266-274

Author(s):

Baghdad Science Journal

Keyword(s):

Nmr Spectroscopy ◽

Physical Properties ◽

Schiff Bases ◽

1H Nmr ◽

13C Nmr ◽

1H Nmr Spectroscopy ◽

Second Step ◽

Direct Reaction ◽

Ft Ir

The present work involved synthesis of serval new substituted tetrazole via Schiff bases for trimethoprim drug by two steps. The first step involved direct reaction of different ketones and aldehydes with trimethoprim producing the corresponding Schiff bases (1-10), whereas the second step, involved preparation new tetrazoles derivatives (11-20) through reaction of the ready Schiff bases (in the first step) with sodium azidein in dioxin. The prepared compounds were characterized by UV, FT-IR, and some of them by 13C-NMR, 1H-NMR spectroscopy and physical properties.

Download Full-text

SYNTHESIS OF NOVEL 4-R-1,2,4-TRIAZOLIN-5-THIONES CONTAINING SPACE-HINDERED FRAGMENT OF PHENOL

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA ◽

10.6060/tcct.2017603.5473 ◽

2017 ◽

Vol 60 (3) ◽

pp. 42

Author(s):

Vladimir N. Koshelev ◽

Ludmila V. Ivanova ◽

Rahman T.Kh. Alasadi ◽

Olga V. Primerova

Keyword(s):

Nmr Spectroscopy ◽

Ir Spectroscopy ◽

1H Nmr ◽

1H Nmr Spectroscopy ◽

Acid Hydrazide ◽

Aqueous Sodium Hydroxide ◽

Slight Excess ◽

Ft Ir ◽

Radical Processes ◽

Ft Ir Spectroscopy

Using of additives inhibiting free radical processes is necessary at production of the lubricating oils. In given article such kind target compounds were obtained from the number of new 1-acyl-4-R-thiosemicarbazides which were synthesized on the base of 3- (4-hydroxy-3,5-di-tert-butyl) propanoic acid hydrazide. The starting hydrazide was prepared from commercially available methyl ester (methylox) by refluxing in ethanol with a slight excess of hydrazine hydrate for 8 h. The best yields of the 1-acyl-4-R-isothiocyanates were achieved by refluxing equimolar amounts of isothiocyanates and hydrazide in isopropanol for 4-5 h. Under these conditions the yield was 75-85%. At further cyclization of intermediates obtained at a first step in aqueous sodium hydroxide for 1.5 h the corresponding 3-acyl-4-R-1,2,4-triazolin-5-thiones were obtained with the yield of 70-90%. Also, this method has absolute advantages due to a simple isolation of target compounds. Based on the IR-spectroscopy data in middle region and 1H NMR spectroscopy it was established that the substances obtained in the crystalline state and in DMSO solution exist in a form of thiones. The composition of obtained substances was determined with elemental analysis whereas the structures of the synthesized compounds were confirmed with FT-IR spectroscopy methods, 1H NMR spectroscopy and mass spectrometry.Forcitation:Koshelev V.N., Ivanova L.V., Alasadi R.T.Kh., Primerova O.V. Synthesis of novel 4-R-1,2,4-triazolin-5-thiones containing space-hindered fragment of phenol. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 3. P. 43-47.

Download Full-text