Neue Fluropalladate(II)

New Fluoropalladates(II) Single crystal investigations on documentclass{article}pagestyle{empty}begin{document}$ begin{array}{*{20}c} {[6][4]} {{rm CsPdPdF}_{rm 5} } end{array} $end{document} (orange brown) demonstrate the close structural relationship to the CsAgFeF₆ – and CsNiNiF₆-type, respectively. One half of the Pd²⁺ ions is surrounded octahedrally, whereas the other half, because of the “absence” of one F^?, is coordinated planar quadratically. CsPd₂F₅ crystallizes orthorhombic (Imma – D, No. 74; Z = 4) with a = 6.53₃, b = 7.86₂, c = 10.79 Å (four circle diffractometer data). From Guinier data are isotypic CsMgPdF₅ (yellow, a = 6.603(2), b = 7.415(2), c = 10.548(3) Å), CsZnPdF₅ (beige, a = 6.576(1), b = 7,483(2), c = 10.645(2) Å), CsNiPdF₅ (yellow, a = 6.499(1), b = 7.504(2), c = 10.575(3) Å) and CsCoPdF₅ (brown, a = 6.527(1), b = 7.553(1), c = 10.659(2) Å). Besides of CsPd₂F₅ there exist compounds of the composition Me₃PdF₅ on the alkali-rich side of the system MeF/PdF₂. Single crystal investigations for Rb₃PdF₃ (yellow, P4/mbm–D, No. 127; Z = 2) led to a = 7.46₇, c = 6.49₇ Å (four circle diffractometer data). Isotypic are (single crystal data) Cs₃PdF₅ (yellow, a = 7.84₈, c = 6.68₈ Å) and Rb₂CsPdF₅ (yellow, ordered distribution of the alkali ions, a = 7.57₅, c = 6.44₅ Å).