Ammonia metal coordination polymers

Generally, Wilkinson complexes which are coordinated with polymeric legands show a relatively high stability in reactions. This is explained as a contribution of the hydrophobic environment of the polymer (113,114). Besides, the polymer plays a role of holding metal without its coagulation. Poly(naphtoquinone)-K-FeCl3 in the ammonia synthesis (115) and poly(acrylic acid)-Rh(III) in the hydrogenation are shown as examples (116,117). 

The formulas given in Table 1 are based solely on weight uptake data after exposure of the polyacetylene films to metal-ammonia solutions followed by washing and vacuum drying. To determine the actual metal content of the doped polymers atomic absorption measurements were carried out. These show conclusively that ammonia molecules are coinserted in the polyacetylene films along with the metal cations. This can be compared to the coinsertion of the solvent tetrahydrofuran which has been found to coordinate with the alkali metal ions Li and Na (22,23). The sodium doped samples coinsert slightly more than about one ammonia molecule for each sodium ion. The real formula for the sodium... 

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