Chemistry Letters, Vol.29, No.6, 678-679, 2000
First'back-to-back' shaped compartmental ligand; Structural characterization of a tetranuclear zinc(II) complex in a highly flattened form
Schiff-base condensation of 3,3',5,5'-tetraformyl-4,4'-biphenyldiol, which was converted from 4,4'-biphenyldiol by a modified Duff reaction, and N,N-diethylethylenediamine in the presence of Zn(CH3CO2)(2) followed by the addition of excess NH4PF6 gave a tetrazinc complex [Zn-4(L)(mu-CH3CO2)(4)] (PF6)(2) (1), where L2- is a new ligand bearing four Schiff-base and two phenoxo-bridging moieties; structure of 1 was fully characterized by X-ray crystallography.