Ternary alkali metal transition metal acetylides A(2)MC(2) with A = Rb, Cs, and M = Pd, Pt [German]

摘要

By the reaction of Rb2C2 and Cs2C2 with palladium or platinum powder in sealed glass ampoules at 653 K ternary acetylides A(2)MC(2) (A = Rb, Cs; M = Pd, Pt) were obtained. Their crystal structures were solved and refined by means of X-ray powder investigations (Na2PdC2 structure type, P (3) over bar m1, Z = 1). The crystal structures are characterised by (1)(infinity)[M(C-2)(2/2)(2-)] chains separated by the alkali metals. Raman spectroscopic investigations revealed wave numbers of the C-C stretching vibrations between 1833 and 1842 cm(-1), which are in good agreement with the results of the analogous sodium and potassium compounds. [References: 20]