Syntheses and Properties of Metal Chelates of the Group IV Elements with the Ligands of Schiff Bases

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  • MISONO Takahisa
    Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo
  • SAWAMURA Katsuhiko
    Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo
  • NEGISHI Osamu
    Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo
  • NAGAO Yukinori
    Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo
  • ABE Yoshimoto
    Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo

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Other Title
  • シッフ塩基を配位子とする第IV族金属キレートの合成と性質
  • シッフ塩基を配位子とする第4族金属キレートの合成と性質--含チタン,ジルコニウム,ケイ素キレートの合成と着色剤としての性質
  • シッフ エンキ オ ハイイシ ト スル ダイ 4ゾク キンゾク キレート ノ
  • 含チタン, ジルコニウム, ケイ素キレートの合成と着色剤としての性質
  • Syntheses of Titanium, Zirconium and Silicon Chelates, and their Properties as a Coloring Material

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Abstract

Titanium, zirconium and silicon chelates with the ligands of the aromatic 2,2′-dihydroxy type schiff bases were synthesized by the reaction of metal tetraalkoxides with the ligands. Silicon chelates were also obtained by the reaction of silicon tetrachloride with disodium salts of the ligands. These were confirmed to be 1 : 2 chelates, M (ligand)2. The properties of these chelates as a coloring material were investigated. Titanium chelates were brown powder, while zirconium and silicon chelates were yellow or orange powder. They were insoluble in water and essentially insoluble in common organic solvent. Thermal stability and lightfastness of these chelates were compared with those of the chelates with the ligands of azo compounds. The chelates with the ligands of schiff bases have not only an excellent thermal stability but also an appreciable lightfastness.

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