On the Ligand Exchange Equilibrium in the Propylene-Mercury(II) Complex
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概要
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The equilibrium between the propylene-mercuric complex and either Cl<SUP>−</SUP>, Br<SUP>−</SUP>, I<SUP>−</SUP>, or EDTA, and their dependences on the pH were investigated manometrically. The propylene-mercuric complexes present in the above equilibrium were found to be (HO<SUP>−</SUP>)<I><SUB>n</SUB></I>-Hg<SUP>2+</SUP>-Propylene (<I>n</I>=0, 1 and 2) and (HO<SUP>−</SUP>)<I><SUB>n</SUB></I>-Hg<SUP>2+</SUP>(X<SUP>−</SUP>)-Propylene (<I>n</I>=0 and 1), and their equilibrium equations were:<BR>& (HO^-)_n-Hg^2++Propylene\oversetK_p1\rightleftharpoons(HO^-)-Hg^2+-Propylene<BR>& X^--Hg^2+-(HO^-)_n+Propylene\oversetK_p2\rightleftharpoons(HO^-)_n-Hg^2+(X^-)-Propylene. <BR>By introducing <I>K</I><SUB><I>p</I>1</SUB>=<I>K</I>′<SUB><I>p</I>1</SUB> and <I>K</I><SUB><I>p</I>2</SUB>=<I>K</I>′<SUB><I>p</I>2</SUB> when <I>n</I>=0, the dependences on the pH were shown by:<BR>logK_p1=logK'_p1+2·pH, logK_p2=logK'_p2+pH<BR>where <I>K</I>′<SUB><I>p</I>1</SUB>=2.2×10<SUP>5</SUP>, <I>K</I>′<SUB><I>p</I>2(cl)</SUB>=4.1×10<SUP>5</SUP>, and <I>K</I>′<SUB><I>p</I>2(Br)</SUB>=2.7×10<SUP>6</SUP> at 25°C and μ=0.8. As was to be expected from the above equilibrium, <I>K</I>′<SUB><I>p</I>1</SUB> was idependent of the presence of Cl<SUP>−</SUP>, Br<SUP>−</SUP>, I<SUP>−</SUP>, and EDTA, while <I>K</I>′<SUB><I>p</I>1</SUB> varied in the presence of Cl<SUP>−</SUP>, Br<SUP>−</SUP>, and I<SUP>−</SUP>. The above relationships were also derived theoretically.
- 公益社団法人 日本化学会の論文
著者
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Nakajima Riichiro
Department Of Chemical Engineering And Materials Science Faculty Of Engineering Doshisha University
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Hara Tadashi
Department Of Chemical Engineering And Materials Sciences Faculty Of Engineering Doshisha University
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Kawai Itsuro
Department of Chemical Engineering, Faculty of Engineering, Doshisha University
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