W. Vandenberg et al., SYNTHESIS, CHARACTERIZATION, AND MOLECULAR-STRUCTURE OF [(CH3)(2)C(C5H4)(2)]FE-2(MU-CO)(2)(CO)(2), Journal of organometallic chemistry, 524(1-2), 1996, pp. 281-284
[(CH3)(2)C(C5H4)(2)]Fe-2(mu-CO)(2)(CO)(2) (1) has been synthesized fro
m 2,2-dicyclopentadienyl propane and pentacarbonyliron in 26% yield. T
he crystal and molecular structure of 1 has been determined by X-ray d
iffraction. The molecule has the expected carbonyl-bridged structure w
ith a cis configuration of the cyclopentadienyl rings. The Fe-Fe dista
nce of 2.484 Angstrom is the shortest one reported to date for ring-br
idged dicyclopentadienyl di-iron tetracarbonyl complexes.