Polychalkogenoanionen der Übergangsmetalle. III. W₃S₉²⁻ und W₃OS₈²⁻, das erste Polyoxothiometallation

Abstract

Beim Ansäuern wäßriger Lösungen von WS2−4 tritt Polymerisation ein und zwar bei gleichzeitig erfolgender Reduktion des Zentralatoms. Aus der Lösung läßt sich W3OS2−8 z. B. als [(CH3)4N]+‐Salz ausfällen. Der diamagnetische Dreikernkomplex wird wie W3S2−9 durch WW‐Wechselwirkung stabilisiert.

Identification of a soluble form of colloidal manganese(IV)

“…Thus phosphate buffers were not needed to keep the Mn(IV) species in solution. 7 The UV-vis spectrum indicated that this species was the same that had been previously detected in many permanganate reactions.3"9…”

Proton-sodium exchange in magadiite. Spectroscopic study (NMR, IR) of the evolution of interlayer OH groups

“…Silanol groups in H-magadiite have been characterized by IR and *H NMR spectroscopies, showing two types of OH groups: those that are involved in relatively strong hydrogen bonds between adjacent layers and those more free, probably pointing to holes of the next layers. 6 The two types of OH groups (4) Rojo, J. M.; Sanz, J.; Ruiz-Hitzky, E.; Serratosa, J. . Z. Anorg.…”

Water soluble conducting polymers

“…The orange films thus obtained are relatively brittle (qualitatively the same as polythiophene or PITN). (6) Preliminary experiments indicate that P3-ETSNa and P3-BTSNa are converted to P3-ETSH and P3-BTSH via ion-exchange chromatography. (7) The color of the P3-ETSNa film with a of -5-10 S cm'1 was green, indicating that it was not fully doped.…”