English  |  正體中文  |  简体中文  |  Items with full text/Total items : 18076/20274 (89%)
Visitors : 4935725      Online Users : 841
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/25049


    標題: 3一取代基一4一醯基雪梨酮之極譜研究
    Study of the Polarogaphic Reduction of 3-Substituted- 4 - Acylsydnones
    作者: 田憲儒
    王來好
    貢獻者: 應用化學科
    日期: 1986
    上傳時間: 2012-02-24 16:02:21 (UTC+8)
    摘要: 先合成了八種 3一取代基一4一醯基雪梨酮,然後用滴汞電極(dropping mercury electrode)研究此類雪梨酮衍生物之還原現象。結果顯示取代基常數的準確性僅有一個限制 : 半波電位的數值僅受取代基在苯環共振及其誘導效應的影響 ; 即雪梨酮衍生物之取代基,若在苯環或雪梨酮環上而為推電子基時,取代基常數(σx)為負值。若為拉電子基時,則其取代基常數為正值。然而所得的反應常數(Pi,z)為正值,甚符合修飾過的Hammett式。雪梨酮衍生物之取代基,若不在苯環或雪梨酮上,則不能符台修飾過的Hammett式。
    Eight 3-substituted-4-acylsydnones were synthesized and the polarographic reaction were investigated carefully. The substituent constant show only a limited precision: The half-wave potentials are controlled by substituent inductive and mesomeric effects transmitted through the phenyl ring and sydnone rings. If an electrondonating group substituted on phenyl or sydnone ring, the substituent constant gives negative value; Whereas an electron-withdrawiog group presents positive value. And the positive value of reaction coostant (pπ,R) fit to the Modified Hammett Equation. If the substituent group was not on the phenyl or sydoone ring, the result values have large deviation.
    關聯: 嘉南學報 12:p.A49-A68 轉載 成功大學學報 21(科技。醫學篇) : p.19-38 (1986)
    Appears in Collections:[嘉南學報] 12期 (1986)
    [食藥產業暨檢測科技系(含五專)] 期刊論文

    Files in This Item:

    There are no files associated with this item.



    All items in CNU IR are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback