2024-03-29T05:22:15Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02003761
2022-10-31T01:43:23Z
1642837622505:1642837957109:1642837979319
1642838403551:1642838406414
MECHANISM OF CHARACTERISTIC DECOMPOSITION OF Cu(PCD)_2 EXTRACTED FROM HYDROCHLORIC ACID: CONTRIBUTION OF REACTION BETWEEN Cu(PCD)_2 AND CuClx^(2-x)
Murakami, Masahiko
Takada, Takeo
Kuniyoshi, Masayuki
国吉, 正之
open access
To study the decomposition mechanism of copper(2) pyrrolidinecarbodithioato chelate (Cu(PCD)_2) extracted into di-isobutylketone (DIBK) with 1-pyrrolidinecarbodithioate (APCD) from 0,01~8 M hydrochloric acid solution, the effect of the ligand concentration in organic phase on the decomposition of Cu(PCD)_2 has been studied. The concentration of the free ligand in the extract decreases with time; this decrease obeys good first-order kinetics, and depends on the acidity. On the other hand, the concentration of Cu(PCD)_2 is not seemingly altered as long as the free ligand is present in the extract; however, the copper chelate begins to react with hydrochloric acid as soon as the free reagent has run out due to its decomposition. Furthermore, the reaction of Cu(PCD)_2 with hydrochloric acid in IBMK solution has also been studied kinetically. To monitor the reaction, the molar absorption coefficients of some species [CuCl(PCD), CuCl_2, and CuCl^-_3], which are formed in the course of this reaction, at 350 - 500 nm are determined. It can be thought that the reaction consists of not only simple ligand substitution by Cl^- but also of the path which gives CuCl(PCD) by reaction between Cu(PCD)_2 and CuCl_2,, and the path can be regard as the practical motive force of the decomposition of Cu(PCD)_2 extracted from hydrochloric acid solution.
紀要論文
琉球大学理学部
2005-09
eng
departmental bulletin paper
VoR
http://hdl.handle.net/20.500.12000/5376
http://hdl.handle.net/20.500.12000/5376
https://u-ryukyu.repo.nii.ac.jp/records/2003761
0286-9640
AN00250774
琉球大学理学部紀要
Bulletin of the College of Science. University of the Ryukyus
80
45
61
https://u-ryukyu.repo.nii.ac.jp/record/2003761/files/No80p45.pdf