Synthesis and structural characterization of a binucleak zirconium complex of tetraanionic p-tert-butylthiacalix[4]arene bridged by methanol

A zirconium complex with the p-tert-butylthiacalix[4]arene anion was synthesized and its crystal structure was determined by single-crystal X-ray analysis. The complex [Zr(mu(2)-CH3OH)(p-tert-butylthiacalix[4]-arene)](2)(.)9H(2)O (1) belongs to the orthorhombic system, space group Pnnm, with a = 20.436(16). b = 12.160(8), c = 20.305(12)Angstrom, V = 6774(7) Angstrom(3) and Z = 2. In Complex 1 zirconium coordinates to four phenolic anions of the deprotonated p-tert-butylthiacilix[4]arene and is bridged by two methanol molecules; the p-tert-butylthiacalix[4]arene adopts a cone conformation.