METAL-COMPLEXES IN INORGANIC MATRICES .8. CHROMIUM TRICARBONYL COMPLEXES OF BENZOYLACETONATE-SUBSTITUTED TITANIUM-ALKOXIDE, ZIRCONIUM-ALKOXIDE, AND ALUMINUM-ALKOXIDES

Benzoylacetone (bzac-H) reacts with one equivalent of Al(OtBu)3 or Zr(OPr)4 to give the mono-substituted compounds (bzac)Al(OtBU)2 (1b) and (bzac)Zr(OPr)3 (1a), while with one equivalent of Ti(OtBu)4 or Zr(OtBu)4 the bis-substituted derivatives (bzac)2Ti(OtBu)2 (3c) and (bzac)2Zr(OtBu)2 (3d) are obtained. Upon heating in dibutyl ether, 1 b disproportionates into (bzac)2Al(OtBu) (3b) and Al(OtBu)3. Thermal reaction of 1a, 3b, and 3c with Cr(CO)6 leads to metal complexes having a Cr(CO)3 moiety pi-bonded to the phenyl group of the benzoylacetonate ligand.