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Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path

Kinetic study on the cleavage of N-phenylphthalimide (NphPT) in the presence of 0.05 M NH2NH2 and mixed H2O-CH3CN solvents reveals the occurrence of reaction scheme GRAPHICS where A, B, C, C-1, An, E, and F represent NPhPT, o-CO2-C6H4CONHC6H5, o-CONHNH2C6H4-CONHC6H5, N-aminophthalimide, aniline, o-C...

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Main Authors: Ariffin, Azhar, Khan, M.N., Lan, L.C., Leng, S.Y.
Format: Article
Published: 2005
Subjects:
QD Chemistry
Online Access:http://eprints.um.edu.my/8045/
http://onlinelibrary.wiley.com/store/10.1002/kin.20057/asset/20057_ftp.pdf?v=1&t=hddxa788&s=7db525fb7179f801b6ad7e3123f3d582ee5b8c17
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spelling my.um.eprints.80452019-08-27T06:05:00Z http://eprints.um.edu.my/8045/ Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path Ariffin, Azhar Khan, M.N. Lan, L.C. Leng, S.Y. QD Chemistry Kinetic study on the cleavage of N-phenylphthalimide (NphPT) in the presence of 0.05 M NH2NH2 and mixed H2O-CH3CN solvents reveals the occurrence of reaction scheme GRAPHICS where A, B, C, C-1, An, E, and F represent NPhPT, o-CO2-C6H4CONHC6H5, o-CONHNH2C6H4-CONHC6H5, N-aminophthalimide, aniline, o-CO2-C6H4CONHNH2, and o-CONHNH2C6H4-CONHNH2, respectively. But, in the presence of either nonbuffered greater than or equal to -0.20 M NH2NH2 or hydrazine buffer of pH similar to 7.30-8.26 with total buffer concentration (\Buf\(T)) of >0.02 M, further conversion of Fto 2,3-dihydrophthalazine-1,4-dione(DHPD) has been detected depending upon the length of the reaction time (t), the values of \Buf\(T), and pH. It has been shown that the rate of conversion of C, to F is much faster than that of C to C, which is much faster than that of F to DHPD. The reaction step A --> C involves general base (GB) catalysis, while step C --> C-1 seems to involve specific base-general acid (GA) and GB-GB catalysis. (C) 2005 Wiley Periodicals, Inc. 2005 Article PeerReviewed Ariffin, Azhar and Khan, M.N. and Lan, L.C. and Leng, S.Y. (2005) Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path. International Journal of Chemical Kinetics, 37 (3). pp. 147-161. ISSN 0538-8066 http://onlinelibrary.wiley.com/store/10.1002/kin.20057/asset/20057_ftp.pdf?v=1&t=hddxa788&s=7db525fb7179f801b6ad7e3123f3d582ee5b8c17 10.1002/kin.20057
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Ariffin, Azhar
Khan, M.N.
Lan, L.C.
Leng, S.Y.
Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path
description Kinetic study on the cleavage of N-phenylphthalimide (NphPT) in the presence of 0.05 M NH2NH2 and mixed H2O-CH3CN solvents reveals the occurrence of reaction scheme GRAPHICS where A, B, C, C-1, An, E, and F represent NPhPT, o-CO2-C6H4CONHC6H5, o-CONHNH2C6H4-CONHC6H5, N-aminophthalimide, aniline, o-CO2-C6H4CONHNH2, and o-CONHNH2C6H4-CONHNH2, respectively. But, in the presence of either nonbuffered greater than or equal to -0.20 M NH2NH2 or hydrazine buffer of pH similar to 7.30-8.26 with total buffer concentration (\Buf\(T)) of >0.02 M, further conversion of Fto 2,3-dihydrophthalazine-1,4-dione(DHPD) has been detected depending upon the length of the reaction time (t), the values of \Buf\(T), and pH. It has been shown that the rate of conversion of C, to F is much faster than that of C to C, which is much faster than that of F to DHPD. The reaction step A --> C involves general base (GB) catalysis, while step C --> C-1 seems to involve specific base-general acid (GA) and GB-GB catalysis. (C) 2005 Wiley Periodicals, Inc.
format Article
author Ariffin, Azhar
Khan, M.N.
Lan, L.C.
Leng, S.Y.
author_facet Ariffin, Azhar
Khan, M.N.
Lan, L.C.
Leng, S.Y.
author_sort Ariffin, Azhar
title Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path
title_short Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path
title_full Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path
title_fullStr Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path
title_full_unstemmed Effects of Mixed H2O-CH3CN solvents on the rate of Hydrazinolysis of N-Phenylphthalimide: spectral and kinetic evidence for The occurrence Of N-Aminophthalimide on the reaction path
title_sort effects of mixed h2o-ch3cn solvents on the rate of hydrazinolysis of n-phenylphthalimide: spectral and kinetic evidence for the occurrence of n-aminophthalimide on the reaction path
publishDate 2005
url http://eprints.um.edu.my/8045/
http://onlinelibrary.wiley.com/store/10.1002/kin.20057/asset/20057_ftp.pdf?v=1&t=hddxa788&s=7db525fb7179f801b6ad7e3123f3d582ee5b8c17
_version_ 1643688202755637248
score 13.211869

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