有機陰イオンを対イオンとする第四級アンモニウム塩の抽出性に及ぼす置換基の寄与

概要

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The ion association extraction of Zephiramine ion with univalent organic anions such as benzoate and benzenesulfonate was carried out. The extraction constants (log K_<ex>) for these ion associates between aqueous and chloroform phases were determined. The contribution values of substituents (-X) on the aromatic ring of anions to log K_<ex>, π_x, were as follows: π_<NO_2(m,p)>=1.05; π_<CI(m,p)>=1.04; π_<CH_3>=0.58; π_<NH_2(m)> =-1.58; π_<NH_2(p)>=-1.81; π_<OH(m)>=-1.18; π_<OH(p)>=-0.54; π_<OCH_3(p)>=0.11; π_<N(CH_3)_2(p)>=0.13. The values of log K_<ex> for sulfonate ions were 1.30 larger than those for carboxylate ions. The values of log K_<ex> for benzoate and benzenesulfonate ions with -NH_2 and -OH groups at o-position were 1.5〜2.2 larger than the values for those with -NH_2 and -OH groups at p-position. By using these empirical parameters, the extraction constants for several ion associates were estimated.
社団法人日本分析化学会の論文
1983-11-05