Zeise's salt studied by high resolution solid state 13C CPMAS and 1H SPEDA NMR spectroscopy

Abstract

Polycrystalline Zeise's salt ( K(CH 2 CH 2 PtCl 3⊎x H 2 O ) was investigated by high resolution solid state 13C CPMAS (cross polarization magic-angle spinning) and 1H SPEDA (single pulse excitation with delayed acquisation) NMR spectroscopies using different rotor spinning speeds. Though the 13C and 1H nuclei are respectively two and three bond lengths separated from the 35 37 Cl nuclei, both the 13C and 1H spectral lineshapes are influenced by the second and higher order dipolar couplings between 13C and 1H and the quadrupole spins 35 37 Cl . An extra splitting or broadening resulting from the coupling between 13C and 195Pt is also found. The high resolution 1H spectrum is also influenced by 1H 195Pt coupling. A computer program was developed to simulate theoretically the observed 13C and 1H NMR spectral lineshapes.