Bis(1-dodecyl-4-aza-1-azoniabi-cyclo-[2.2.2]octane)tetra-iso-thio-cyanato-cobalt(II).

The title compound, [Co(C18H37N2)2(NCS)4], consists of a cobalt(II) ion positioned on the origin of the triclinic unit cell. It is coordinated by the N atoms of two trans-oriented 1-dodecyl-4-aza-1-azoniabi-cyclo-[2.2.2]octane (DABCO+) cations, which carry n-dodecyl chains at the non-coordinating N atoms. The distorted octa-hedral coordination environment of the CoII ion is completed through four N atoms of iso-thio-cyanate ions, which are arranged within the equatorial plane. Non-classical hydrogen bonding of the types C-H⋯N and C-H⋯S between the filamentous mol-ecules lead to the formation of layers parallel to (001).

Bis(N-adamantyl-N'-ethyl-imidazolium) tetra-bromido-manganate(II).

The title compound, (C15H23N2)2[MnBr4], comprises two N-adamantyl-N'-ethyl-imidazolium cations and one tetra-hedral [MnBr4]2- anion. Next to Coulombic inter-actions, weak hydrogen bonds of the type C-H⋯Br consolidate the crystal packing, building up a three-dimensional network.

On the Use of Polyelectrolytes and Polymediators in Organic Electrosynthesis.

Although organic electrosynthesis is generally considered to be a green method, the necessity for excess amounts of supporting electrolyte constitutes a severe drawback. Furthermore, the employment of redox mediators results in an additional separation problem. In this context, we have explored the applicability of soluble polyelectrolytes and polymediators with the TEMPO-mediated transformation of alcohols into carbonyl compounds as a test reaction. Catalyst benchmarking based on cyclic voltammetry studies indicated that the redox-active polymer can compete with molecularly defined TEMPO species. Alcohol oxidation was also highly efficient on a preparative scale, and our polymer-based approach allowed for the separation of both mediator and supporting electrolyte in a single membrane filtration step. Moreover, we have shown that both components can be reused multiple times.