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] . 0.5H(2)O crystallizes in the monoclinic system, P2(1)/m space group, with a = 13.014(6), b = 14.146(9), c = 13.184(7) Angstrom, beta = 113.307(10)degrees, V = 2229(2) Angstrom(3) and Dc = 1.710 gcm(-3), Z = 2. 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. (C) 2003 Elsevier Science B.V. All rights reserved.