Halogeno Metallates of Transition Elements with Cations of Nitrogen-containing Heterocyclic Bases. VII Two Oxidation States and our Four Different Iron Coordinations in one Compound. Synthesis, Crystal Structure, and Spectroscopic Characterization of

摘要

The title compound being stable on air crystallizes from aqueous hydrochloric acid solutions in the trigonal space group R3 with a = 13,197(1), c = 38,405(6) A. Besides the cations in chair form, the structure contains six discrete, mononuclear chloroferrate anions arranged on a threefold axis. Tetrahedral, octahedral, and for the first time with iron(II), trigonal bipyramidal metal coordinations occur. Four sub-spectra contributing to the ~(57)Fe Mossbauer spectrum can be distinguished and have been attributed to all four types of chloroferrate anions in the structure. The Raman spectroscopic investigation of orientated single crystals allows recognize polarized and non-polarized vibrations as well as to attribute all observed frequencies.