Cumulative subject index: vol. 176 (1979)–200 (1980)

Electron deficient CpTiCl₃ reacts with the bis-alkoxide CpCl$\text{TiOCMe}{}_2\text{CMe}{}_2\text{O}$ to produce the diolato dimer (CpTiCl₂)OCMe₂CMe₂O(TiCl₂Cp). CpTiCl₃ reacts with Cp₄Ti₄Cl₄(μ₂-O)₄, which also has two oxo ligands on each titanium atom, to produce CpTiCl₂]₂O. These and other redistribution reactions indicate that destabilization results from internal competition for metal d-orbitals by strong π-donor (e.g. alkoxide) ligands. Equilibrium constants for the formation of the η²-acetyl complexes Cp₂ZrC(O)Me]X by Co insertion into Cp₂ZrMeX decrease in the order X = Me>Cl>OEt. This reflects internal competition of π-donor orbitals on X with the oxygen donor orbital in the η²-acetyl functionally. The significance of this effect for Fischer-Tropsch syntheses in both homogeneouus and heterogeneous media is discussed.