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].

Sequential X-ray-Induced Single-Crystal to Single-Crystal Transformation followed by Topotactic Reduction in a Potassium Crown Ether Complex of Tetrachloroaurate(III).

During data collection, the unreported potassium crown ether salt [K(18-crown-6][AuCl4] undergoes a sequential X-ray-induced and irreversible single-crystal to single-crystal transformation from P1̅ to C2/ c followed by a topotactic reduction to crystalline [K(18-crown-6][AuCl2] within the same C2/ c space group.