The syntheses of the complexes (η5-C5H5)Ln(η8-C8H8)·nTHF and (η5-C9H7)Ln(η8-C8H8)·2THF and the crystal structure determination of (η5-C5H5)Pr(η8-C8H8)·2THF and (η5-C9H7)Pr(η8-C8H8)·2THF

Abstract

LnCL₃ reacts with NaC₅H₅ and K₂C₈H₈ to yield the complexes (η⁵-C₅H₅)Ln(η⁸-C₈H₈)·nTHF (Ln = Pr, Nd, n= 2; Ln = Gd, n= 1) and LnCl₃ reacts with KC₉H₇ and K₂C₈H₈ to yield the complexes (η⁵-C₉H₇)Ln(η⁸-C₈H₈)·2THF (Ln = Pr, Nd; η⁵-C₉H₇= indenyl); crystallography reveals (η⁵-C₅H₅)Pr(η⁸-C₈H₈)·2THF and (η⁵C₉H₇)Pr(η⁸-C₈H₈)·2THF not to possess the parallel ring sandwich structure.