Radical cations and dications of bis[1]benzothieno[1,4]thiazine isomers

Bis[1]benzothieno[1,4]thiazines (BBTT) are particularly electron-rich S,N-heteropentacenes and their radical cations and dications can be relevant intermediates in charge transport materials. All three regioisomers of N-p-fluorophenyl-BBTT (syn–syn, syn–anti, and anti–anti) were studied. A reliable preparation of radical cations and dications using antimony pentachloride as an oxidant gives deeply colored salts. The electronic structure of the radical cations was assessed by EPR spectroscopy, whereas dicationic structures were characterized by NMR spectroscopy. In addition, a deeper insight into the electronic structure was experimentally and computationally obtained by UV/Vis spectroscopy …

Protic Ferrocenyl Acyclic Diamino Carbene Gold(I) Complexes

Polysubstituted ferrocenes as tunable redox mediators

A series of four ferrocenyl ester compounds, 1-methoxycarbonyl- (1), 1,1’-bis(methoxycarbonyl)- (2), 1,1’,3-tris(methoxycarbonyl)- (3) and 1,1’,3,3’-tetrakis(methoxycarbonyl)ferrocene (4), has been studied with respect to their potential use as redox mediators. The impact of the number and position of ester groups present in 1–4 on the electrochemical potential E1/2 is correlated with the sum of Hammett constants. The 1/1+–4/4+ redox couples are chemically stable under the conditions of electrolysis as demonstrated by IR and UV–vis spectroelectrochemical methods. The energies of the C=O stretching vibrations of the ester moieties and the energies of the UV–vis absorptions of 1–4 and 1+–4+ c…

CCDC 2107164: Experimental Crystal Structure Determination

Related Article: Sven D. Waniek, Christoph Förster, Katja Heinze|2021|Eur.J.Inorg.Chem.|2022||doi:10.1002/ejic.202100905

CCDC 2107165: Experimental Crystal Structure Determination

Related Article: Sven D. Waniek, Christoph Förster, Katja Heinze|2021|Eur.J.Inorg.Chem.|2022||doi:10.1002/ejic.202100905