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INTRODUCTION. The attempt to prepare C_9H_7CeCl_2. nTHF(C_9H_7=indenyl) by the reaction of CeCl_4 3THF with C_9H_7Na in THF(tetrahydrofuran) has failed, but an unexpected orange crystal was obtained and determined by single cryntal X-ray diffraction to be a new complex [Ce~ⅢCl_2 (THF)_5]~+[Ce~ⅣCl_5 THF]~-. The valence state of the cerium atom in the cation is different from that in the anion, the former being trivalent while the latter quadrivalent. In this paper the crystal structure of the new complex is reported.
INTRODUCTION. The attempt to prepare C_9H_7CeCl_2. NTHF (C_9H_7 = indenyl) by the reaction of CeCl_4 3THF with C_9H_7Na in THF (tetrahydrofuran) has failed, but an unexpected orange crystal was obtained and determined by single cryntal X-ray diffraction to be a new The valence state of the cerium atom in the cation is different from that in the anion, the former being trivalent while the latter quadrivalent. paper the crystal structure of the new complex is reported.