Counterion condensation synthesis

Counterion Condensation during Synthesis of Copolymeric Polyelectrolytes... 

The procedure given here represents a high-yield reproducible synthesis for salts of [Ni6(CO)12]2- with several counterions, and affords fairly pure products. It involves the reduction of Ni(CO)4 with alkali hydroxide in N, N-dimethylformamide (DMF) as solvent and the use of a low-temperature condenser to prevent Ni(CO)4 loss due to the stripping action of the evolving carbon monoxide. 

Schiff base macrocyclic complexes of lanthanides have been prepared by a metal-template condensation of a diamine and 2,6-diacetyl or 2,6-diformyl derivative of pyridine or p-cresol [74]. The yield of these complexes depends on the radius of the metal ion and the donor ability of the counterion [75]. The acetate anion gave high yields while chloride and perchlorate anions gave poor yields [76]. In general the template synthesis... 

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