| Autor: |
Kataoka, Kazuaki, Kimura, Sumihisa, Shirakawa, Fumiko, Sasaki, Yoshio |
| Zdroj: |
Bulletin of the Chemical Society of Japan; August 1981, Vol. 54 Issue: 8 p2237-2242, 6p |
| Abstrakt: |
Complex formation between several kinds of metal chlorides and 4,5-dimethoxy-1,2-benzoquinone (1) or 4-methoxy-1,2-naphthoquinone (2) has been studied by means of NMR and spectrophotometry in CH3NO2. Stability constants of the 1 : 1 complex were found to decrease in the order of SnCl4>InCl3>ZnCl2>BiCl3>SbCl3>HgCl2. ΔδMLand Δνmax, which indicate the change in the chemical shift and the wavenumber on the formation of the 1 : 1 complex, were also arranged in the above order. The same order was reproduced from an electrostatic potential. Both ΔδMLand Δνmaxwere proved to be a convenient scale for the relative acceptor strength of metal chlorides. For the basicity of o-quinones, the order of 1>2was obtained from the thermodynamic data and from the negative charge on the carbonyl oxygens. The solute-solvent interaction model was also found appliciable in this system. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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