Cyclometallated compounds II. Proton and carbon-13 nuclear magnetic resonance spectral assignments of cyclopalladated compounds

Abstract

The 1H and 13C NMR spectra of nineteen cyclopalladated acetylacetonate complexes are reported. Definitve spectral assignments are made on the basis of selective proton decoupling experiments, difference NOE spectra and both homo- and hetero-nuclear two-dimensional correlation spectroscopy. The Pd(acac) substituent is shown to induce characteristic chemical shift changes in both proton and carbon spectra. These effects, however, vary from those of differently substituted palladium and other metal substituents.