Synthesis and crystal structure of trans-Rb-2[Pd(NO2)(2)Cl-2]. Structure refinement of Na-2[Pd(NO2)(4)]

The reaction products of palladium(II) nitration with sodium nitrite in the presence of rubidium salts are described. The crystal structure of rubidiu m dinitrodichloropalladoate(II) - trans-Rb-2[Pd(NO2)(2)Cl-2] - has been stu died (KUMA automatic diffractometer, MoK alpha radiation, graphite nionochr onzator, theta /2 theta scan mode for 2 < <theta> < 30<degrees> 758 experim ental reflections, R = 0.030; R = 0.023 for I > 2 sigma (I)). Crystal data: a = 15.123(3), b = 7.750(2), c = 7.776(2) Angstrom, V = 911.4(4) Angstrom (3), space group Cmca, Z = 4, d(calc) = 3.209 g/cm(3). The structure consis ts of [Pd(NO2)(2)Cl-2](2-) complex anions and Rb+ cations. The planar squar e coordination of the Pd atom, is completed to distorted octahedral by, the chlorine atoms of the neighboring complexes at Pd...Cl distances of 3.18 A ngstrom. Chains of complexes with alternating orientations are formed. The geometrical characteristics of the complex anions, the coordination polyhed ra of the cations, and the heavy atom sublattice are analyzed. The crystal structure of Na-2[Pd(NO2)(4)] has been refined, and refinement data are giv en.