Xm. Chen et al., SYNTHESIS AND STRUCTURES OF NOVEL OCTADECANUCLEAR CLUSTERS H)(24)(PYB)(12)(H2O)(18)(MU(12)-CLO4)](17+)(RE=SM, EU), Science in China. Series B, Chemistry, life sciences & earth sciences, 39(5), 1996, pp. 536-545
The novel octadecanuclear Cu-RE duster have been isolated from the rea
ction system of aqueous Cu2+-RE(3+)-pyb (RE=Sm, Eu; pyb=pyridine betai
ne) and characterized by single-crystal structural analysis. The resul
ts show that the clusters comprise a [Cu(12)RE(6) (mu(5)-OH)(24)(mu(12
)-ClO4)](17+) octahedral core, which encapsulates a ClO4- ion and has
18 water molecules and 12 bridging pyb carboxylato ligands as external
ligands.