Transition-metal complex anions

The results of studies for complexes formed between polyammonium macrocycles and transition metal complex anions indicate that cation anion electrostatic attraction is a crucial factor in complexation reactions and serves to regulate the stoichiometry of the complexes formed. Hydrogenbonding, size, and conformational factors also play major roles. Anions can be incorporated in or out of the ring. Two illustrative examples are metal ion complexes with the octaprotonated macrocycle Hg[30]aneNio (46). In the complex with Co(CN)6 , the anion hes outside the macrocycle. The PdCLi complex is a true inclusion situation, however, in which the PdCU is situated along the minor axis of the macrocychc cavity, and the Cl atoms are out of the frame, forming strong hydrogen bonds with the polyammonium... 

Polypyrrole doped with transition-metal complex anions... 

Synthetic layered hydroxides with hydrotalcite-like structures are used as heterogeneous catalysts for base-catalyzed reactions. One of their major drawbacks for technological application is their low stability during hydrothermal and/or thermal treatments. Recent attempts to incorporate large, preferably multicharged anions into their interlayer spaces introduced new routes for preparation of more stable materials. The effect of intercalated polymetalates or transition metal complex anions in the fi amework of layered hydroxides is twofold They increase the gallery heights and thermal stability on one hand and introduce additional Lewis or Bronsted acidic sites in a basic framework on the other hand. 

Other noteworthy studies on the polymerization of pyrrole in aqueous solutions under different conditions have been performed. Oxygen and water molecules were found to participate in electropolymerization and introduce carbonyl and hydroxyl groups into the films as identified by XPS and FT-IR spectra [56]. Pyrrole films containing transition metal complex anions (a = 100 S cm ) [57] and dodecyl-benzenesulfonate (cr up to 120 S cm ) [58] have been grown in aqueous solutions. 

B. Reactions of Transition Metal Complex Anions with RX... 

A series of complexes in which the diorganothallium moiety is linked to various transition-metal complex anions have been prepared, RaTl-ML [MLn = M(CO)2LCp M = Mo or W L = CO or PPha R = Me,Et, or Ph). The compounds were obtained by a variety of methods, e.g. by protolytic reactions, reaction (43), metathesis reactions, reaction (44), or by redistribution... 

Another important new conducting system with transition metal complex anions is the first organic... 

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