Unexpected, photochemically induced activation of the tetrabutylammonium cation by hexachloroplatinate(iv).

A dinuclear, butadiene-bridged complex, trans-µ2:η2,η2-1,3-butadiene-bis(trichloroplatinate(ii)) (1) was unexpectedly obtained on photolysis of acetone solutions of (NBu4)2[PtCl6].