Second-sphere coordination in the complex [Mn(H2O)6]2[thiacalix[4]arene tetrasulfonate]

The title calixarene, dimanganese thiacalix[4]arene tetrasulfonate, was prepared and its crystal structure was determined. [Mn(H2O)6]2[thiacalix[4]arene tetrasulfonate]·0.5H2O crystallizes in the monoclinic system, <f>P2(1)/m</f> space group, with <f>a=13.014 (6),</f> <f>b=14.146 (9),</f> <f>c=13.184 (7)</f> A˚, <f>β=113.307 (10)°,</f> <f>V=2229 (2)</f> A˚3 and <f>Dc</f>=1.710 gcm−3, <f>Z=2.</f> The title calixarene exists in the solid state as bilayer structure. The hydrophobic organic layer consists of thiacalix[4]arene tetrasulfonate in an up-down fashion, whereas, the hydrophilic inorganic layer consists of hexaaquamanganese (II) which is linked to the former through a second-sphere coordination. [Copyright &y& Elsevier]