ExsyCalc

This program is intended for the study by NMR of molecular systems undergoing chemical exchange. It does a quantitative Analysis of the experimental intensities of the NMR peaks obtained in EXSY experiments to calculate the magnetization exchange rates k` of the exchange equilibrium (related with the reaction rate constants k ). The program allows the calculation of systems with an arbitrary number of exchange sites, spins, populations and arbitrary longitudinal relaxation rates. The calculations are done according to a full relaxation Matrix analysis of the intensities. The range of applicability of the approach used requires that the signal of each different species in the exchange Process is conveniently separated from the others in the NMR Spectrum (i.e. slow chemical exchange in the chemical shift time scale).