Abstract
Each of the chiral polyoxomolybdate(VI) salts (R 3NH) 4[Mo 8O 26(R 3N) 2] and (Na) 2(R 3NH) 2[Mo 8O 26] (R 3N = (+)-cinchonine, (+)-hydroquinidine or (−)-quinine), in the presence of the cocatalyst EtAlCl 2, catalyses the ring-opening metathesis polymerization of norbornene at room temperature. The polynorbornene produced in these reactions was found to be mostly insoluble. Inclusion of a chain transfer agent, 1-hexene, in the reactions leads to greatly improved yields of polynorbornene which is freely soluble in chloroform, and the quantity of polymer formed is highly sensitive to the amount of 1-hexene added.
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