monohydrate were acquired from Sigma-Aldrich (Merk, Spain) and ruthenium
trichloride trihydrate (RuCl3·3H2O) from
Johnson Matthey. Deuterated solvents were obtained from Eurisotop,
except for deuterated trifluoroacetic acid, which was obtained from
Sigma-Aldrich. All chemicals were used as received without further
purification.