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Register a new userConedensation Reaction Between ٥-Methyl-٣ Aminoisoxazol and Formalin
تكاثف ٥ ميتيل ٣ أمينو ايزوكسازول مع الفورمالين
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Damascus University ورقة بحثية
Publication date
2003
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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يتضمن هذا البحث دراسة لتكاثف بعض الأمينات الأولية العطرية غير المتجانسة خماسية الحلقة مع المحلول المائي للفورم ألدهيد (الفورمالين). لقد وجدنا أن التكاثف ضمن الأسيتونتريل و عند (٩pH-٧،٥) يعطي كحولات أمينية صيغتها العامة (G-NHCH٢OH) في معظم الحالات و بمردود جيد. يعطي تفاعل ٥-ميتيل ٣-أمينو ايزوكسازول مع الفورمالين عند pH ~ ٩ أيضًا الأمين (GNHCH٢NH-G).
A product study of the reaction of some five-membered heteroaromatic primary amines with formalin in Acetonitrile was made: Aminols of general formula (G-NH-CH٢OH) were identified in most cases at pH (٧،٥-٩) in good yield. Reaction of ٥-methyl ٣-Aminoisoxazol with formalin under basis media (pH~٩) give the Aminal (G-NH-CH٢-NH-G).
References used
., (١٩٧٣), Advances in the chemistry of Manich Bases. Synthesis, December,Tramontini, M
Varma., S. R., and Kumar., D.,(١٩٩٨), Manganese Triacetate Oxidation of phenolic Schiff’s bases, Synthesis of ٢-arylbenzoxazoles, J. Heterocyclic. Chem
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Kinetic studies were carried out on the reaction between 2-Methyl 1,5
diaminopentane and dimeric fatty acids in melt phase. The reaction was
performed at 113, 130, 140, 155, and 164 ºC and followed by determining the
acid value of the product .The
polyamidation reaction was found to be of
overall second order with an activation energy of 45.48 k cal⁄g mol up to (52, 57,
79, 80, 86)% conversion at (113, 130, 140, 155, 164) ºC and overall third order
with an activation energy of 43.73 k cal⁄g mol above (52, 57, 79, 80, 86)%
conversion at (113, 130, 140, 155, 164) ºC.
Fattypolyamide was prepared by reaction of (1,5-Diamino pentane) with
dimeric fatty acid C36 in molten state. The reaction was performed at 110 C˚
without catalyst, then with (Phosphoric acid, Sulphoric acid and Manganese
dioxides). The Kinetic st
udy was carried out on the reaction and followed by
determining the acid value of the product. The polyamidation reaction was
found to be on the overall a second order up to 59% conversion. Then the
reaction order changes. We found that the Catalyst increases the velocity of the
reaction with manganese dioxides the best Catalyst. The Degree of
Polymerization, Number Average Molecular Weight and Weight Average
Molecular Weight have been calculated during different times. The
relationships between Degree of Polymerization and Number Average
Molecular Weight, Weight Average Molecular Weight with times are linear
until 59%conversion at 110˚C with used catalysts. The highest (N.A.M.W) and
(W.A.M.W) was accomplished with the Catalyst MnO2.
حضرت البوليميرات الذوابة بالماء بشكلها الحمضي و الملحي انطلاقا من فنيل حمض الفسفور مع
حمض الأكريليك ، و حمض ميتا الأكريليك، و بلا ماء حمض المالئيك. حددت هوية المنتجات المحضرة
بالطرائق الكيميائية، و الكروماتوغرافية، و مطيافية ما تحت الأحمر.
A series of new heterocyclic compounds of2-(5-substituted-furfurylidene)-
Indane-1,3-dione, were prepared and identified by their melting points,
Infrared, Ultraviolate, and Nuclear magnetic resonance spectra.
Study the kinetics degradation of poly (dimeric acid C36 with 1.9 – diamino
nonane) was carried out by thermal analysis (TGA), and thermodynamic and
equilibrium constants have been defined, moreover, study the kinetics of
reaction between 1.9 – di
amino nonane and dimer fatty acid C36 was carried
out in molten state, the reaction was performed at 160 ºC, the acid value, and
percentage of carboxylic functions of the product were determined. The
polyamidation reaction was found to be of overall second order until
conversion of 97% at 160 ºC, then the order of reaction changes.
حركية تفاعل الأميدة
Kinetic of polyamidation reaction
Number Average Molecular Weight
Weight Average Molecular Weight
الحمض الديميري الدسم C36
ثنائيات الأمين
ثوابت ترموديناميكية
الوزن الجزيئي الوسطي العددي
الوزن الجزيئي الوسطي الوزني
الوزن الجزيئي الوسطي اللزوجي
Dimeric fatty acid C36
Diamines
Thermodynamic constants
Viscosity molecular weight
المزيد..
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