Triphenylcarbenium hexachloroantimonate

A solution of 0.87g of triphenylcarbenium hexachloroantimonate in CH2CI2 was added to 0.36g of polyd, 3-octadienyliron tricarbonyl) in 3 ml of CH2CI2. The infrared spectrum of the mixture taken after 10 min at ambient temperature clearly shows the formation of cationic pentadienyl residues. 

The infrared spectrum (carbonyl region only) of the reaction product between triphenylcarbenium hexachloroantimonate and poly(1,3-octadienyliron tricarbonyl) is shown in Fig. 8. The spectrum shows four discrete peaks. The two at 2000 cm" and 2030 cm are from the unreactive trans diene iron tricarbonyl segments of the polymer and the two at 2085 cm" and 2120 cm" are due to the cationic pentadienyliron tricarbonyl segments in the polymer and correspond well with the peaks displayed by the model compound (Fig. 7). This then confirms the presence of cis/trans segments in poly(1,3-octadienyliron tricarbonyl). 

Figures. Poly(l,3-octadienyliron tricarbonyl) reacted with triphenylcarbenium hexachloroantimonate.

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