摘要:
The structure of the title compound, [Fe(Cp)(2)][FeCl4] (Cp = cyclopentadienyl, C5H5), was reported in 1978 in the non-centrosymmetric space group Pna2(1) at room temperature [Paulus & Schafer (1978). J. Organomet. Chem. 144, 205-213]. A low-temperature data set indicates a phase transition from the non-centrosymmetric space group to the centrosymmetric space group Prima. Crystals of [Fe(Cp)(2)][AlCl4] have also been studied at low temperature and are isomorphous with the FeC4- complex.