Molecular structure and linkage isomerization of isothiocyanato(3-thiapentane-1,5-dithiolato)oxorhenium(V) complex

The solvents with low dielectric constant (ε´) such as CH2Cl2, only 1a isomer was detected, while in the solvents with high ε´ such as CH3CN, both 1a and 1b isomers were observed. We have obtained the equilibrium constant (Kiso) for the linkage isomerization reaction in CD3CN by measuring 15N NMR spectra at various temperatures.