臺灣博碩士論文加值系統

本論文是以電化學方法研究雙性與惰性混和溶劑中溶劑與溶質之化學與物
理性質. 所採用之溶劑為丙酮與水兩種, 除了用純丙酮與純水之外,也以
不同比例的丙酮與水混合液為溶劑. 溶質則為苯甲酸(Benzoic Acid)的鄰
位, 間位, 對位的鹵化, 甲基與硝基衍生物.本研究以電導改良法為主要
實驗方法, 藉著介面卡與化學自動滴定儀聯線, 可自動由儀器取得實驗數
據. 並利用與之聯接的電腦, 以ORIGIN軟體計算出所需要的電化學數據.
前述溶質在不同之惰性非水溶劑中的酸性解離常數(Dissociation
Constant) 為討論溶質在溶劑中電化學行為的主要項目, 由下列兩方面來
討論解離常數的變化情形:一. 溶劑的物理性質如介電常數和偶極矩等對
溶質酸性解離常數變化的影響.二. 溶質官能基的種類與位置對其在溶劑
中酸性解離常數變化的影響

The major works of this research is to study the effects of
dielectric constant, autoprotolysis constant, and other
physical or chemical constants of mixed amphiprotic and aprotic
solvents on the dissociation of derivatives of benzoic acid.
The pKa values was estimated by Modified conductometric meth
od. Personal computer which was connected with conductometer
was used not only for recording the data in measurements but
also for calculating the results of experiment. The mixtures of
acetone and water in different ratio was use as mixed solvents,
and the derivatives of benzoic acid was used as solutes. The
pKa values of solutes in different mixed solvent and the
effects of physical constants of solvents and the struc- tures
of solutes was widely discussed in this paper.