New complex salts (barium and silver tetranitropalladates(II) Ba[Pd(NO)]· nHO ( n = 1, 3) and Ag[Pd(NO)]) are synthesized. The compounds are characterized using elemental and X-ray diffraction analyses and IR spectroscopy. The salts crystallize in different space groups. The mutual orientation of nitro groups depending on the outer-sphere counter ion is examined.