Redox Behaviour of Cymantrene Fischer Carbene Complexes in Designing Organometallic Multi-tags (original) (raw)

2014, Chemistry - A European Journal

A series of Group 7 Fischer carbene complexes, [Cp(CO) 2 Mn I = C(OEt)Ar] (Cp = cyclopentadienyl, Ar = Th = thienyl (1 a), Ar = Fu = furyl (2 a), Ar = Fc = ferrocenyl (3 a)) and biscarbene complexes, [Cp(CO) 2 Mn=C(OEt)ÀAr'À(OEt)C= Mn(CO) 2 Cp] (Ar' = Th' = 2,5-thienylene (1 b), Ar' = Fu' = 2,5furylene (2 b), Ar' = Fc' = 1,1'-ferrocendiyl (3 b)) was synthesized and characterized. Chemical oxidation of [Cp(CO) 2 Mn= C(OEt)Fc] (3 a) and isolation of the oxidised species [3 a][PF 6 ] possessing a Mn II centre proved possible below À30 8C in dichloromethane solution. The ESR spectrum of the transiently stable radical cation, [3 a][PF 6 ]

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