Formation of a novel hexanuclear ZrIV cage compound with bridging chelating ligand: [(CpZr)6(μ-O2C-C6H2Cl2-2-O)9(OH2)3]•H2O

The reaction of Cp2ZrCl2 with 3,5-dicholorosalicylic acid in a CH2Cl2-Et2O system containing HCl (1.0 mol L-1), gives a cage half-sandwich cyclopentadienyl-zirconocene compound, [(CpZr)(6)(mu-O2C-C6H2Cl2-2-O)(9)(OH2)(3)]center dot H2O (1). The crystal structure of 1 shows a twisted tripyramidal prism cage structure with one water molecule in the cage's cavity. In the cage, the dianionic, substituted salicylate ligands adopt a bridging chelate mu(2)-(O, O', O '') coordination mode. (C) 2010 Elsevier B.V. All rights reserved.