Iodine heptafluoride with cas registry number of 16921-96-3 is also known as Iodine fluoride (IF7) ; Iodine(VII) fluoride .It melt at 4.5 °C to form colourless crystals. It has an unusual pentagonal bipyramidal structure. The molecule can undergo a pseudorotational rearrangement like the Berry mechanism but for a hepta coordinated system.
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