Ga. Olah et al., O-17 AND C-13 NMR AB-INITIO IGLO GIAO-MP2 STUDY OF OXONIUM AND CARBOXONIUM IONS (DICATIONS) AND COMPARISON WITH EXPERIMENTAL-DATA, Journal of the American Chemical Society, 119(34), 1997, pp. 8035-8042
A series of oxonium and carboxonium ions and their corresponding proto
nated dications were investigated by ab initio/IGLO/GIAO-MP2 methods.
The calculated O-17 and C-13 NMR chemical shifts were compared with th
e solution phase experimental data for the monocations. The structures
and energies of a number of oxonium and carboxonium dications and the
effect of diprotonation on the O-17 and C-13 NMR chemical shifts were
also studied.