Abstract
Three types of metal complexes containing coordinated zwitterionic 8-Quinolinol(oxine) are isolated from the reaction ofMOx 2 (M=divalent Ni, Mn, or Mg; HO x =oxine) and haloacetic acidsRCO2H (R=CF3, CCl3, CHCl2, or CH2Cl) in benzene. These types are:M(O2CR)Ox·HOx forM=Ni,R=CCl3, CHCl2, and CH2Cl and forM=Mn,R=CHCl2.MOx(HOx) (RCO2)MOx·nH2O forM=Ni, Mn, or Mg,R=CF3 andn=1,1, and 4, respectively.MO x (HOx) (RCO2)2 MOx forM=Mn andR=CCl3. These types are compared with the simple mixed chelateMn(O2CCH2Cl)Ox. Interrelated reactions are suggested to explain the formation of these metal complexes and the contributing factors are discussed. The coordination of the zwitterion to the metal ion through its phenolate oxygen and the presence of the triatomic system+N−H...O in the three types of metal complexes are evidenced by typical infrared bands. Analytical and spectral data are in accordance with the suggested formulations.
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