The X-ray structure of [Me3SiC4SiMe3]2Fe2(CO)7: a σ—π-type bonding complex between a diacetylene and Iron carbonyl

摘要: Abstract The photochemical reaction of bis-(trimethylsily) butediyne, Me3SiC4SiMe3, with Fe(CO)5 in benzene yields a product formula [Me3C4SiMe3]2Fe2(CO)7, II. and molecular structure were determined by single crystal x-ray analysis. results correct (I) previously proposed based on spectroscopic evidence. red crystals are monoclinic, space group I2/a = 21.647(6), b 8.924(2), c 19.544(8) A, β 96.09(3]° Z 4. Anisotropic refinement 21 independent atoms 872 observed reflections converged at R 0.062 Rw 0.064. molecule II is made up two diacetylene ligands, an inserted CO (CO)3Fe-Fe(CO)3 group. ligands line “head-to-head” arrangement combine the iron carbonyl through off one triple bonds. reactive carbon from ligand π-bond to atom, while these σ-bonds second atom. reverse occurs for ligand. A inserts bridges between each substituted SiMe3. other which σ-bond CCSime3. Three isomers possible this reaction, but only observed.