Abstract
The title compound, [2(1,2,3,3a,6a-η)-1,4-dihydropentalenyl][μ-(l,2,3,3a,6a-η:3a,4,5,6,6a-η)pentalene]-[1(η 5 )-pentamethylcyclopentadienyl]diiron, [Fe 2 (C 8 H 7 )-(C 10 H 15 )(C 8 H 6 )], has a metallocenic structure with the two pentalene ligands adopting an eclipsed conformation. In the central pentalene ligand, all the peripheral bonds are of similar length whereas the bridge bond is longer; there are two significantly different Fe-C distances, i.e. a mean value of 2.121 (3) I for the Fe-C bridge distances and a mean value of 2.028(3)A for the distances from the Fe atoms to all other C atoms. In the terminal pentalene ligand, the C-C and C-Fe distances in the ring bonded to the Fe atom are all similar.
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