Bis(tetramethylcyclopentadienyl)ruthenium-A Fully Eclipsed Sandwich Compound

A new compound, Bis(tetramethylcyclopentadienyl)ruthenium has been synthesi- zed by reducing tetramethylcyclopentadiene in situ. The results of X-ray diffraction studies demonstrate the title compound to be of a fully eclipsed conformation. The crystal belongs to monoclinic system, space group C/2 c with lattice parameters a = 22.075(3), b = 10.674(3), c=14.135(2) , β=101.74(1), V=3261.1~3, Z=8, Several cycles of block matrix least- squares refinement gave the final R = 0.034.