Abstract
Both strontium and barium acesulfames, namely poly[aqua-bis-(μ(3)-6-methyl-2,2-dioxo-1,2λ(6),3-oxa-thia-zin-4-olato)strontium(II)], [Sr(C(4)H(4)NO(4)S)(2)(H(2)O)] (n) , and the barium(II) analogue, [Ba(C(4)H(4)NO(4)S)(2)(H(2)O)] (n) , crystallize in nearly identical isotypic forms, with barium-oxygen inter-atomic distances being longer due to the larger ionic radius of the barium(II) ion. The coordination number of the metal ion is 9; the coordination polyhedra can be described as distorted capped square anti-prisms [Johnson solid J10; Johnson (1966). Can. J. Math.18, 169-200]. The conformation of the acesulafame ions is a distorted envelope with an out-of-plane S atom. Metal and acesulfame ions are assembled into infinitive chains along the [100] axis. These chains are connected via hydrogen bonds into a three-dimensional network.