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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 29, Number 2
JKCSEZ 29(2)
April 20, 1985 

 
Title
Kinetic Study on Nucleophilic Substitution of 1-Anthracenesulfonyl Chloride with Anilines

1-염화안트라센 술포닐의 치환아닐린과의 친핵성치환반응의 속도론적 연구
Author
Hyong Tae Kim, Soo Dong Yoh

김형태, 여수동
Keywords
Abstract
기질로 사용한 1-염화안트라센 술포닐(융점124℃)을 안트라키논으로 부터 합성하여 확인한 결과, 그 융점이 문헌치(90℃)와 상당한 차이를 나타내었다. 이 기질과 치환아닐린이 무수 아세톤 속에서 일어나는 친핵성 치환반응의 메카니즘을 전기전도도법을 써서 속도론적으로 고찰하였다. 이 반응은 무촉매 과정과 아닐린류에 의한 촉매 과정이 병행하여 일어나며 촉매작용은 친전자적임을 알았다. Brφnsted β (0.77), Hammett ρ(-3.2) 및 무촉매반응 속도상수의 온도 의존성에서 결정한 활성화 파라미터로 부터 이 반응은 술포닐암모늄 중간체를 거치는 associative SN2로 논의하는 것이 가장 적절하였다.

1-Anthracenesulfonyl chloride used as a substrate has been prepared from anthra-quinone, and its melting point (124℃) was confirmed to be considerably different from the literature value (90℃). Rates of nucleophilic substitution reactions of this substrate with some p-substituted anilines in dry acetone were determined by electroconductometric method, and their mechanism has been discussed. As a result, it has been found that these reactions proceed in parallel catalyzed by anilines together with noncatalyzed process, and that their catalytic activities are electrophilic. Judging from Brφnsted β (0.77), Hammett ρ(-3.2), and activation parameters which were determined from the temperature dependence of noncatalyzed second order rate constants, it appears most appropriate that their mechanism should be discussed in terms of an associative SN2 involving sulfonylammonium intermediate.

Page
88 - 97
Full Text
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