A Remarkable Ring Opening Observed in the Reaction of Cyclopropyl Ferrocenyl Thioketone with Triiron Dodecacarbonyl Fe₃(CO)₁₂

Abstract In continuation of the study focused on synthesis and structure mimics active site [FeFe] hydrogenase enzyme, reaction Fe 3 (CO) 12 with cyclopropyl ferrocenyl thioketone 1 was carried out. Two different complexes ring‐opened fragments were isolated identified as η 4 ‐1‐thia‐1,3‐diene‐type mononuclear tricarbonyl iron complex 2 ‐acyl‐type hexacarbonyl diiron , respectively. Structures crystalline products unambiguously confirmed by single crystal X‐ray analysis. For ring opening cyclopropane moiety, leading to formation a multistep radical mechanism postulated. Electrochemical investigations being reminiscent mimic, out at scan rates.