Synthesis of [(μ-RS)Fe2(CO)6](μ4-S)[(μ-R‘S)Fe2(CO)6] and [(μ-t-BuS)Fe2(CO)6](μ4-Se)[(μ-PhSe)Fe2(CO)6] via Reactions of (μ-RS)(μ-p-MeC6H4SO2S)Fe2(CO)6 with Nucleophiles. Crystal Structure of [(μ-t-BuS)Fe2(CO)6](μ4-S)[(μ-PhC⋮CS)Fe2(CO)6]

A new synthetic route to μ 4 -E (E = S, Se) twin clusters has been discovered, which involves reactions of (μ-RS)(μ- p -MeC 6 H 4 SO 2 S)Fe 2 (CO) 6 with nucleophiles (μ-R‘S)(μ-XMgS)Fe 2 (CO) 6 and (μ-PhSe)(μ-BrMgSe)Fe 2 (CO) 6 to give the twin clusters [(μ-RS)Fe 2 (CO) 6 ](μ 4 -S)[(μ-R‘S)Fe 2 (CO) 6 ] ( 5a, R = R‘ = Et; 5b, R = Et, R‘ = PhC 2; 5c, R = t-Bu, R‘ = Me; 5d, R = t-Bu, R‘ = Ph) and [(μ-t-BuS)Fe 2 (CO) 6 ](μ 4 -Se)[(μ-PhSe)Fe 2 (CO) 6 ] ( 6 ) characterized by combustion analysis, spectroscopy, and (for 5b) X-ray diffraction techniques.