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Linear free energy relationship rate constants and basicities of N-substituted phenyl glycines in positronium-glycine complex formation

✍ Scribed by Rongti Chen (Y.T. Chen); Jiachang Liang; Youming Du; Chun Cao; Dinzhen Yin; Shuying Wang; Tianbao Zhang

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
346 KB
Volume
137
Category
Article
ISSN
0009-2614

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✦ Synopsis

Complex formatton between positronium and glycine derivatives in solutton is discussed and the complex reaction rate constants obtained by means of a posrtron annihilation lifetime spectrometer with BaF, detectors. Rate constants mainly depend on the conjugation effect at the benzene rmg and the induction effect of the substituents at the phenyl. There is a linear free energy relationship between rate constants and basicities of N-substituted phenyl glycines m o~ho~sitmni~-~ycine complex formation.

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## Abstract The kinetics and mechanism of cyclization of the anionic sigma complex obtained from the reaction of 1,3,5‐trinitrobenzene (TNB) and 1‐benzyl‐1‐(ethoxycarbonyl)‐2‐propanone (BEP) in the presence of triethylamine (NEt~3~) have been studied in CH~3~CN–CH~3~OH (50% v/v). The order of the r