Study of the transfer of electronic effects of ligands in mono- and biscyclopentadienyl derivatives of titanium in various solvents

Abstract

1. Employing the19F NMR method it was found that the effect of cyclopentadienyls (CPD), containing various donor substituents, is transmitted to the fluorine atom that is found in the p-position of a phenyl group that is present in the mono- and bis-CPD-aroxy derivatives of titanium, and also to the fluorine atoms in the trifluoroacyl derivatives of titanium. 2. In the case of the mono-CPD derivatives of titanium the ability to transmit the electronic effect depends on the complexing properties of the solvent (the effect of various CPD on the fluorine atom in the ligand is not transmitted in solvating solvents); in the case of the bis-CPD derivatives this dependence is absent for all of the investigated solvents. 3. A study was made of the ability of a number of oxygen-, nitrogen-, and sulfur-containing solvents to undergo coordination with the titanium atom in CPD-tri-(p-fluorophenoxy)titane.