N. Hovnanian et al., A NEW BARIUM COMPLEX BASED ON BA(DPM)(2) - BA-6(DPM)(10)(H2O)(6)(O-2)- AN UNEXPECTED BARIUM PEROXO-BETA-DIKETONATE STRUCTURALLY CHARACTERIZED, Polyhedron, 14(2), 1995, pp. 297-300
The title compound consists of an octahedron of barium atoms connected
together by dpm and aqua ligands in which the O-2(2-) group, bridging
the six metal atoms, has a long O-O bond.