Structures and magnetic properties of catena-(μ-MO4-O,O′)[Ni(II)(L)]·5H2O (M=Cr, Mo; L=3,10-bis(2-hydroxyethyl)-1,3,5,8,10,12-hexaazacyclotetradecane)

The new compounds catena-(μ-CrO4-O,O′)[Ni(II)(L)]·5H2O and catena-(μ-MoO4-O,O′)[Ni(II)(L)]·5H2O where L is 3,10-bis(2-hydroxyethyl)-1,3,5,8,10,12-hexaazacyclotetradecane, have been synthesized and structurally characterized by spectroscopy, magnetic susceptibility and X-ray crystallography. The nickel ions of the one-dimensional chain complexes are bridged by the tetraoxometalate ([CrO4]2− or [MoO4]2−) unit. The magnetic properties of the chain complexes in the temperature range 5–300 K indicate that there are weak ferromagnetic intrachain interactions among the nickel ions. The electronic as well as infrared spectral properties of the title complexes are also reported and discussed.