All complexes for which solid state structures are presented were found to either crystallize in monoclinic or orthorhombic space groups as it has exemplarily been observed for several of Lewis adducts of the general type [Co(TMSA)2L]. Further information on the crystallographic data and data acquisition parameters are displayed in Table . For selected compounds, namely 4 and 10 -12, additional comments on the disorders found in the measured crystals can be found in the SI (section 4).