Abstract
LnCL3 reacts with NaC5H5 and K2C8H8 to yield the complexes (η5-C5H5)Ln(η8-C8H8nTHF (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.