Ligand-exchange Reactions of Dimethoxobis(acetylacetonato)ziconium with Alkyl Acetoacetate and Tricarbonyl Compounds
1996 Volume 1996 Issue 1 Pages 43-47
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1996 Volume 1996 Issue 1 Pages 43-47
Title reactions have been conducted in benzene. Ethyl acetoacetate reacted with the Zr-OMe group of dimethoxobis (acetylacetonato) zirconium, Zr (OMe)2 (acac)2, to afford the disproportionation products bearing a Zr-OMe group. However, the reaction with methyl acetoacetate (Hmtac) led to the formation of the Zr (mtac)2 (acac)2 containing a small amount of Zr-OMe group.
The reactions of Zr ( 0Me)2 (acac)2 with tricarbonyl compounds (HL) such as 3-acety1-2, 4-pentanedione (Hacacac) and 3-ethoxycarbonyl-2, 4-pentanedione (Hecacac) in a 1: 2 molar ratio proceeded smoothly to afford the corresponding Zr ( L)2 (acac)2 in high yield. The Zr (Li)2 (acac)2 complex was not obtained from the reaction between Zr (acac)4 and HL in the molar ratio. The Zr (L)4 complex was produced in high yield from the reaction of Zr (OMe)2 (acac)2 or Zr (acac)4 with an excess amount of HL. The solubility of the isolated Zr(L)4 complexes for aprotic solvent was examined.
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