Abstract: | The title saccharinate complexes, aqua1,2‐benzisothiazol‐3(2H)‐onato 1,1‐dioxide‐N]bis(1,10‐phenanthroline‐N,N′)manganese(II) 1,2‐benzisothiazol‐3(2H)‐onate 1,1‐dioxide,Mn(C7H4NO3S)(C12H8N2)2(H2O)](C7H4NO3S), and aqua1,2‐benzisothiazol‐3(2H)‐onato 1,1‐dioxide‐N]bis(2,2′‐bipyridine‐N,N′)cobalt(II) 1,2‐benzisothiazol‐3(2H)‐onate 1,1‐dioxide, Co(C7H4NO3S)(C10H8N2)2(H2O)](C7H4NO3S), have been prepared and their crystal structures determined at 150 K. The structure of the manganese complex consists of repeated alternating Mn(phen)2(sac)(H2O)]+ cations and non‐coordinated saccharinate anions. The water molecule, bound to manganese as part of a slightly distorted octahedral arrangement, is hydrogen bonded to an O atom of the SO2 group in the saccharinate counter‐ion. In contrast, the cobalt complex has one pseudo‐octahedral Co(bipy)2(sac)(H2O)]+ cation, with the cobalt‐bound water molecule hydrogen bonded to the N atom of the accompanying free saccharinate anion. |