Titanium-47 and titanium-49 nuclear magnetic resonance in half-sendwich n5-cyclopentadienyl, n5-methylcycylopentadienyl, n5-tetramethylcycylopentadienyl or n5-pentamethylcyclopentadienyl-titanium (IV) trihalides

Abstract

Electron-donating methyl substituents on the cyclopentadienyl ring as well as a halide substitution on the central titanium atom cause contra-intuitive downfield shifts, which are discussed in terms of variation in paramagnetic contribution to the observed shielding. A direct correlation between --, the logest wavelenght charge-transfer transition in the electronic spectrum, has been found.