The title complex Cp (CO)2FeSn(C6H11)3 was synthesized and it’s crystal structurewas determined by four-circle X-ray diffra tometer. The crystal belongs to monoclinic system, space group C2/c with parameters: a=1.947 6 (4) nm, b=0.882 6 (2) nm, c=2.915 8(6) nm, β= 95.49(3)°, Z=4. The two carbonyl groups attached to iron atom lie inabout right angles to each other and to the tin-iron axis. The three-fold axis passing throughthe iron atom and relating these three ligand directions is almost perpendicular to the plane ofthe cyclopentadienyl ring. The co-ordination of ligands around the tin atom is close to tetrahedral. The cyclohexyls are all in stable chair-conformations.
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