scholarly journals Preparation of some azo compounds by diazotization and coupling of 2- amino -5 – thiol -1,3,4- thiadizaole

2015 ◽  
Vol 4 (2) ◽  
pp. 271-275
Author(s):  
Baghdad Science Journal
Keyword(s):  
Sodium Carbonate ◽  
Aromatic Compounds ◽  
Diazonium Salt ◽  
Azo Compounds ◽  
Anhydrous Sodium Carbonate ◽  
Physical Chemical

2- amino -5- thiol-1,3,4- thiadiazole (S1) was prepared by cyclic locking of thiosemicarbazide in the presence of anhydrous sodium carbonate and CS2. diazotization of (S1) compound gave diazonium salt (S2) that reacts with different activated aromatic compounds to get the following azo compounds ,2 [(4- aminophenyl) diazenyl ] 1,3,4- thiazdiazole-5- thiol (S3) ,2-[4-amino- 1-naphthyl diazenyl] -1,3,4 – thiazdiazole-5-thiol (S4) , 3-amino-4-[(5- mercapto -1,3,4- thiadiazole -2-yl) diazenyl ] phenol(S5) ,1-[(5-mercapto-1,3,4-thiadiazole-2-yl) diazenyl] -2-naphthol (S6) , 5-{[4-(dimethylamino) phenyl] diazenyl}-1,3,4-thiadiazole-2- thiol(S7) ,5-{[4-(diethylamino) phenyl] diazenyl}-1,3,4- thiadiazole-2- thiol(S8) ,2- amino-5-[(5-mercapto-1,3,4-thiadiazole-2-yl) diazenyl] phenol(S9) . All the prepared azo compounds have been characterized and identified through the study of their some physical, chemical and spectrometrical (U.V.I.R) properties.

scholarly journals Synthesis and Biological Effectiveness of Some new Azo Compounds as Derivatives of Nitrogen Bases

2016 ◽  
Vol 13 (2) ◽  
pp. 368-375
Author(s):  
Baghdad Science Journal
Keyword(s):  
Diazonium Salt ◽  
Coupling Reaction ◽  
Hemoglobin Concentration ◽  
Antimicrobial Activities ◽  
Uv Spectra ◽  
Azo Compounds ◽  
Nitrogen Bases ◽  
Antibacterial And Antifungal Activities ◽  
Physiological Tests

In this study the new azo compounds (3compounds) for nitrogen bases (Adenine and Cytosine) are synthesized through two reaction steps (formation of diazonium salt and coupling reaction). The compounds have been characterized by FTIR, melting point, and ultra-violate (UV) spectra. All synthesized compounds have been estimated in vitro for their antimicrobial activities against two species of bacteria(E.coli, S.aureus)and one kind of fungi ( Aspergillus flavus) .The results show that these compounds have very good antibacterial and antifungal activities especially compounds 1 and 3.To study the effect of these compounds were making some physiological tests on rats are made ,the results of hematological study showed decreasing level of total hemoglobin concentration in all treatment groups specially in group (1).The values of Packed in cell volume (P.C.V) are within normal blood range of rats . Total leucocytes count (W.B.C) decrease in all groups.

scholarly journals Sodium carbonate revisited

2003 ◽  
Vol 59 (3) ◽  
pp. 337-352 ◽  
Author(s):  
Michal Dusek ◽  
Gervais Chapuis ◽  
Mathias Meyer ◽  
Vaclav Petricek
Keyword(s):  
Sodium Carbonate ◽  
Harmonic Approximation ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
Anhydrous Sodium Carbonate ◽  
First Order ◽  
Commensurate Phase ◽  
Na Ions ◽  
Fifth Order ◽  
First Time

We present the structure of anhydrous sodium carbonate at room temperature (phase γ) and 110 K (phase δ) based on single-crystal X-ray diffraction data. The incommensurate phase γ was determined almost 30 years ago in the harmonic approximation using one modulation wave and first-order satellites. In our work we use satellites up to fifth order and additional harmonic waves to model the anharmonic features of the structure. The commensurate phase δ is presented for the first time. Using the superspace approach, both phases are compared in order to find common trends in the whole range of the sodium carbonate phases. We present arguments supporting the hypothesis that the driving force of the phase transitions may originate in the unsaturated bonding potential of one of the Na ions.

Preparation of animal glue binder treated by anhydrous sodium carbonate

2018 ◽  
Vol 32 (15) ◽  
pp. 1658-1669 ◽  
Author(s):  
Tian-Shu Wang ◽  
Wei-Hua Liu ◽  
Ying-Min Li
Keyword(s):  
Sodium Carbonate ◽  
Animal Glue ◽  
Anhydrous Sodium Carbonate

Anhydrous sodium carbonate as an acidimetric standard

The Analyst ◽  
1961 ◽  
Vol 86 (1024) ◽  
pp. 464 ◽  
Author(s):  
S. J. Cox ◽  
W. C. Johnson ◽  
E. J. Newman ◽  
J. T. Yardley
Keyword(s):  
Sodium Carbonate ◽  
Anhydrous Sodium Carbonate

scholarly journals Synthesis and Characterization of New Azo Compounds Linked to 1, 8-Naphthalimide and Studying Their Ability as Acid-Base Indicators

2019 ◽  
pp. 2341-2352
Author(s):  
Suaad M.H. Al-Majidi ◽  
Mohammed G.A Al-Khuzaie
Keyword(s):  
Diazonium Salt ◽  
Coupling Reaction ◽  
Alkaline Media ◽  
Azo Compounds ◽  
Acid Base ◽  
Naphthalic Anhydride ◽  
Azo Compound ◽  
Basic Solutions ◽  
Specific Reactions

New Azo compounds containing an 1,8-naphthalimide moiety were synthesized from 1, 8-naphthalic anhydride by a reaction with p-phenylenediamine or benzidine to produce 1,8-naphthalimide derivatives (1 or 2), which were converted to diazonium salt derivatives by using sodium nitrite and acetic acid at 0-5 áµ’C. The diazonium salt was subjected to a coupling reaction with different substituted phenol in alkaline media at 0-5 áµ’c to produce azo compound derivatives (3-14). The New Azo compound derivatives (3-14) were identified by 1H-NMR, 13C-NMR, and FTIR and by measuring characteristic physical properties and specific reactions. Also, the ability of the prepared azo compounds to work as acid-base indicator was investigated, since azo dyes have different and sharp colors in acidic or basic solutions.

Preparation of Novel Terbium Complexes Using Anhydrous Sodium Carbonate as Base and Nanometer Core

2015 ◽  
Vol 36 (7) ◽  
pp. 782-787
Author(s):  
金 凤 JIN Feng ◽  
张文军 ZHANG Wen-jun ◽  
陶栋梁 TAO Dong-liang ◽  
蒋雪月 JIANG Xue-yue ◽  
张 宏 ZHANG Hong ◽  
...  
Keyword(s):  
Sodium Carbonate ◽  
Anhydrous Sodium Carbonate ◽  
Terbium Complexes
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