We have used a combination of 13C and 205T1 NMR 2D exchange spectroscopy (EXSY) to study cyanide exchange reactions in an aqueous solution containing the recently established complexes T1(13CN)3 and T1(13CN)4−, and H13CN. Because of the well-resolved heteronuclear spin-spin couplings (up to 8 kHz), the system was considered to have six exchanging sites for 13C NMR and nine for 205T1 NMR. The employed method gave an overview of the dynamic processes at chemical equilibrium. It is shown that in such systems otherwise invisible kinetic information can be brought into light. The EXSY spectra were evaluated quantitatively for both nuclei, and rate constants were calculated for the different exchange pathways.
ASJC Scopus subject areas
- Colloid and Surface Chemistry