Journal of Physical Chemistry p. 2123 - 2129 (1981)
Update date:2022-08-11
Topics:
Al-Lohedan, Hamad
Bunton, Clifford A.
Romsted, Laurence S.
The reaction of hydroxide ion with methyl N,N,N-trimethylglycinate (1a) is inhibited by cationic micelles of C14H29NMe3Cl and C16H33NMe3Cl (MTACl and CTACl) besause the substrate is largely in the aqueous pseudophase which is depleted in OH- by the cationic micelles.Added Cl- displaces OH- from the micelles and decreases micellar inhibition.The corresponding reaction of methyl N-dodecyl-N,N-dimethylglycinate (1b) is catalyzed by both MTACl and CTACl which bind both reactants, but this catalysis is reduced by NaCl.Self-micellization of methyl N-hexadecyl-N,N-dimethylglycinate (1c) speeds reaction with OH-, and the rate constants reach plateau values with increasing substrate concentration and are independent of OH-.But addition of either CTACl or NaCl slows reaction because Cl- displaces OH- from the micelle.These diverse rate effents can be accounted for quantitatively in terms of the pseudophase ion-exchange model, which considers reactions in both the aqueous and micellar pseudophases and the distribution of both reactants between the pseudophases.
View MoreContact:86-25-58619180
Address:Nanjing High-Tech Zone 10 Xinghuo Road Pukou District Nanjing, Jiangsu 210061 The People's Republic of China
qingdao goldenchem imp and exp co.,ltd.
Contact:532-55579246
Address:no.62 ,haier road laoshan distirct
Shijiazhuang Frontierchem Co., Ltd.
Contact:+86-311-89271196
Address:4-4-202 No.15 Biandian Street,Shijiazhuang
website:http://www.maisonchem.com.cn
Contact:0086-311-83833777
Address:Leitou industrial district, xinji, shijiazhuang city, hebei province,
Contact:+86-20-62802632;62802633
Address:Room 330 GIGCAS Building,No.511 Kehua Street,Tianhe District
Doi:10.1002/ejoc.201403035
(2015)Doi:10.1246/cl.1996.565
(1996)Doi:10.1021/jm0614782
(2007)Doi:10.1016/j.tet.2006.06.117
(2006)Doi:10.1023/B:COHC.0000018335.49120.af
(2003)Doi:10.1016/j.tetlet.2005.11.090
(2006)