Iodine trifluoride

Iodine (III ) fluoride

Yellow solid ( -78 ° C)

Decomposition> -28 ° C

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Iodtrifluorid is a chemical compound of iodine and fluorine. The Inter- halogen compound, like other of this class is very unstable and decomposes easily.

History

Iodtrifluorid was first shown in 1960 by M. Schmeisser from the elements iodine and fluorine.

Production and representation

Iodtrifluorid be represented in several ways. In addition to the synthesis of the elements, it is possible to recover the compound from the reaction of iodine with xenon (II ) fluoride in trichlorofluoromethane.

Properties

The structure of the IF3 molecule can be explained by the VSEPR model. In addition to the three fluorine ligands, the iodine atom has two lone pairs of electrons. With these, the molecule forms a trigonal bipyramid, considering only the atoms, it appears T-shaped. The axial fluoro- iodine bonds have a length of 198 pm, a length of the equatorial 187 pm. The angle between the fluorine atoms be 80.1 °.

Iodtrifluorid is only stable at temperatures below -28 ° C. Will there be heated above this temperature, it decomposes to iodine and iodine pentafluoride. Like other inter-halogen compounds is Iodtrifluorid a fluorinating agent, but weaker than bromine or chlorine trifluoride.

Use

Iodine fluoride can be represented by the reaction of iodine with Iodtrifluorid in trichlorofluoromethane at low temperatures.