Platinum(IV) iodide is an inorganic compound with the formula . it is a dark brown diamagnetic solid and is one of several binary iodides of platinum.
Structure Platinum(IV) iodide forms dark brown crystals of several modifications:
α-, rhombic crystal system, spatial group P bca, cell parameters a = 1.290 nm, b = 1.564 nm, c = 0.690 nm, Z = 8;
β-, cubic crystal system, spatial group P m3m, cell parameters a = 0.56 nm, Z = 1;
γ-, tetragonal crystal system, spatial group I 41/a, cell parameters a = 0.677 nm, c = 3.110 nm, Z = 8.
Preparation Platinum(IV) iodide can be prepared by reacting iodine with platinum:
Iodide accelerates this process.
It can also be obtained from the decomposition of hydrogen hexaiodoplatinate(IV) at 80 °C:
Chemical properties It decomposes when heated:
When dissolved in hydroiodic acid, platinum(IV) iodide forms hydrogen hexaiodoplatinate(IV):
References