Lead Tetra-iodide

Lead Tetra-iodide does not exist, but the quinoline double salt (C₉H₇NH)₂PbI₆ has been prepared by treating the corresponding chloride with potassium iodide, though doubt has been raised whether this compound is really a derivative of quadrivalent lead or a poly-iodide of the bivalent metal. The pyridine salt (C₅H₅NH)₂PbI₆ also exists.