Structure of a discrete 8 : 6 La(Iii): P-sulfonatocalix[4]arene complex

The crystal structure of a complex formed between La(III) and p-sulfonatoca lix[4]arene is reported. The complex cristallizes in the monoclinic space g roup P2(1)/n, a = 15.091(1), b = 28.550(3), c = 30.167(3) Angstrom, beta = 90.008(2)degrees, V = 12997(2) Angstrom (3), rho (calc). (g cm(-3)) = 1.792 , Z = 2. Refinement led to R-1 value of 0.0961 for 13930 unique reflections . It forms discrete units with 8 La(III) cat-ions coordinated by 6 calixare ne ligands. The calixarenes are organized in an up-down configuration, brid ged by La(III), forming layers of 3 repeating calixarene units and channels along the a axis. The units are linked by hydrogen-bonds.