Synthesis and structure analysis of some bulkily substituted ferrocenium triiodides

A series of bulkily substituted ferrocenium triiodides with general formula (RC5H4)(2)FeI3 have been synthesized and characterized by elementary analy sis, DR spectrum, mass spectrum, ESR spectrum, MtjSSbauer spectrum and cond uctiYity. The CTyStal structure of [CH2(CH2)(3)C(2-CH2C5H4N)C5H4](2)FeI4. H 2O has been determined. The crystal belongs to triclinic, space group P - 1 , The cell parameters are a = 0.9593(1), b = 1.3999(2), c = 1.4537(2)nm. al pha = 109.64(1), beta = 97.25(1), gamma=104.69(1)degrees. V=1.7299nm(3), M- r= 1039.13, D-x =1.98g/cm(3), Z= 2. The results indicate that the substitut ed ferrocene is partially oxidized by iodine, therefore the central metal i ron shows mixed valence state. Because of the effect of bulky substituents in cyclopentadienyl ring the polyiodide chains of the I-3(-) ions are nest formed, the conductivities of these compounds are very low.