(2,2'-Bipyridine-kappa2N,N')(1,1-cyclobutanedicarboxylato-kappa2O,O')palladium(II), (1,1-cyclobutanedicarboxylato-kappa2O,O')(1,10-phenanthroline-kappa2N,N')palladium(II) monohydrate and (1,1-cyclobutanedicarboxylato-kappa2O,O')(1,10-phenanthroline-kappa2N,N')palladium(II) dihydrate.