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Acid dissociation constants and the conformations of 2-furfural and 2-thiophene aldehyde benzenesulphonylhydrazones
Other Title(s)
ثابت التفكك الحامضي و الشكل الفراغي لمركبات 2-فيرفورال، و 2-ثيوفين ألدهايد بنزين سلفونيل هيدرازون
Source
Journal of King Abdulaziz University : Sciences
Issue
Vol. 7, Issue 1 (31 Dec. 1995), pp.39-46, 8 p.
Publisher
King Abdulaziz University Scientific Publishing Center
Publication Date
1995-12-31
Country of Publication
Saudi Arabia
No. of Pages
8
Main Subjects
Abstract EN
Acid dissociation constants, pKa, of 2-furfural benzene-sulpho-nylhydrazone, (1) and 2-thiophene aldehyde benzenesulphonylhydrazone, (2) have been determined spectrophotometrically in ethanol-water media of various composition over the temperature range 15-40°C.
The results were used to calculate the enthalpy AH and the entropy AS for the ionization process.
The slight difference observed between the pKa values of the studied compounds (1) and (2) revealed that the ring heteroatom is not involved in the formation of hydrogen-bonded chelate ring.
This was confirmed by dipole moment, IR, and NMR spectral measurements.
American Psychological Association (APA)
Fahmi, Abd al-Jawad Ali& Sad, Jamal R.. 1995. Acid dissociation constants and the conformations of 2-furfural and 2-thiophene aldehyde benzenesulphonylhydrazones. Journal of King Abdulaziz University : Sciences،Vol. 7, no. 1, pp.39-46.
https://search.emarefa.net/detail/BIM-396464
Modern Language Association (MLA)
Fahmi, Abd al-Jawad Ali& Sad, Jamal R.. Acid dissociation constants and the conformations of 2-furfural and 2-thiophene aldehyde benzenesulphonylhydrazones. Journal of King Abdulaziz University : Sciences Vol. 7, no. 1 (Dec. 1995), pp.39-46.
https://search.emarefa.net/detail/BIM-396464
American Medical Association (AMA)
Fahmi, Abd al-Jawad Ali& Sad, Jamal R.. Acid dissociation constants and the conformations of 2-furfural and 2-thiophene aldehyde benzenesulphonylhydrazones. Journal of King Abdulaziz University : Sciences. 1995. Vol. 7, no. 1, pp.39-46.
https://search.emarefa.net/detail/BIM-396464
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 45
Record ID
BIM-396464