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.