Synthesis of 1-Substituted Benzimidazoles Using N,N'-Thionyldibenzimidazole or N-Chlorosulfinylbenzimidazole

N,N'-Thionyldiimidazole has been known as an imidazole transfer reagent^2–4 and form a new class of compound with a wide range of synthetic application. Continuing our studies on the imidazole transfer reaction, we succeeded with the benzimidazole transfer reaction using N,N'-thionyldibenzimidazole. The present communication deals with a new procedure providing 1-substituted benzimidazoles.     

Electron transfer of conjugated polymeric ferrocenes

This paper describes three topics on the π‐conjugated ferrocene oligomers and polymers; the first is the dependence of intervalence‐transfer bands for mixed‐valence oligo(1,1'‐dihexylferrocenylene)s on the oxidation number and the number of ferrocene units, the second is synthesis of azo‐bridged ferrocene oligomers and a polymer and electrochemical and optical analysis of internuclear electronic interactions in their mixed‐valence states and the third is synthesis, redox behaviors and electrodeposition of oligoferrocenylene‐modified gold clusters.     

Impedance Effect on Ion Transport in a Temperature‐Sensitive Gel Membrane

The impedance effect on the ion transport of lithium chloride through temperature‐ and pH‐sensitive gel membranes was investigated. Both conductance and loss tangent show a relatively high value at temperatures near the lower critical solution temperature (14°C), followed by an abrupt drop with a further rise in temperature. The Figure shows an example of changes in absolute complex conductance (Y ), real conductance (G ), and imaginary conductance (B) for a poly(acryloyl‐L ‐proline methyl ester) gel membrane.