Studies of 8-Mercaptoquinoline as Chelate Agents. II. Infrared Absorption Spectra of its Divalent Metal Chelates

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概要

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• The infrared spectra of divalent metal thiooxinates have been measured in the region between 4000 and 400 cm<SUP>−1</SUP>, and the relationships between these spectral bands and the characteristics of the metal-ligand bonding and the structures of the thiooxinates have been discussed. The plots of the frequencies of the metal-sensitive bands around 990 and 670 cm<SUP>−1</SUP> against the atomic weight of the metal make it possible to classify these metal thiooxinates into two groups, one of which includes Cu-, Co-, Ni-, and Mn-thiooxinate, and the other, Cd-, Zn-, and Pb-thiooxinate. The deviation of the point for Zn-thiooxinate from the line belonging to thiooxinates with such metal atoms as have no available <I>d</I>-orbitals has been compared with the case of oxinates. Moreover, from the appearance of the 450 cm<SUP>−1</SUP> band in the latter group, the structure of these thiooxinates may be tetrahedral. As for the frequencies of the two metal-sensitive bands mentioned above, those of Pd- and Pt-thiooxinate are the highest and that of Ag(I)-thiooxinate, examined for the sake of comparison, is the lowest. The possibility of the analytical application of the metal-sensitive band around 670 cm<SUP>−1</SUP> has been discussed.

• 公益社団法人 日本化学会の論文

著者

• Sekido Eiichi

  Department of Chemistry, Faculty of Science, Kobe University

• Mido Yoshiyuki

  Department of Chemistry, Faculty of Science, Kobe University

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