Abstract
Two neutral polyoxotantalates {[CuL]2[Cu(L)2]2[Ta6O19]}·nH2O have been synthesized by conventional reaction conditions, and characterized via different physical methods. Single-crystal X-ray analyses were carried out on {[CuL]2[CuL2]2[Ta6O19]}‧21H2O (L = 1,10-phen, denoted as 1) and the isostructural {[CuL]2[CuL2]2[Ta6O19]}‧20H2O (L′ = 2,2′-bipy, denoted as 2). Both complexes comprise a Lindqvist [Ta6O19]8− hexatantalate which acts as an octadentate ligand to coordinate two [CuL] units and two [CuL2] fragments through six bridging and two terminal oxygen atoms. In addition, the solid-state magnetic susceptibility of 1 and 2 are investigated briefly.
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