They are the interhalogen compounds. Let us start with what interhalogen compounds are. Chemistry > The p-Block Elements > Interhalogen Compounds. Interhalogen Compounds- Learn about the preparation of interhalogen Start loving chemistry by getting in touch with BYJU’S through the mobile app. Structural chemistry of the interhalogen compounds. Elizabeth Fessenden. J. Chem. Educ., , 28 (12), p DOI: /edp Publication Date: .

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Beyond that, iodine monochloride has several applications, including helping to measure the saturation of fats and oils, and as a catalyst for some reactions. Equal volumes of chlorine and fluorine join at K to shape chlorine monofluoride.

By direct mixing of Halogens and by reaction of Halogens with lower Interhalogen compounds.

Allotropic Forms Table of Content BrF 3 has the highest thermal stability of the chemistrry with four atoms. The compounds that are encircled by the union of two halogens are named as Inter Halogen Compounds.

Interhalogen Compounds

The lone pairs will involve the tropical positions while bond pairs will possess the other three positions. Made by direct combination of the elements to form a dark red crystalline solid.


The molecule has the form interhaloge a tetragonal pyramid. BrF has not been obtained pure and dissociates into the trifluoride and free bromine. Itnerhalogen are of four general types:. The number of smaller halogens that can bond to a large central halogen is guided by the ratio of the atomic radius of the larger halogen over the atomic radius of the smaller halogen.

No astatine fluorides have been discovered yet.

At K, chlorine reacts with fluorine of equal volume to form ClF. Why interhalogens are more reactive than halogens?

Most interhalogens are halogen fluorides, and all but three IBr, AtBr, and AtI of the remainder are halogen chlorides. Ot is because A-X bonds in interhalogens are weaker than the X-X bonds in dihalogen molecules. The interhalogen compounds of type AX 5 and AX 7 are formed by larger atoms having low electronegativity with the smaller atoms having high electronegativity. As the ratio of the radius of larger and smaller halogen increases, the number of atoms in a molecule also increases.

All interhalogens are diamagnetic. AX and AX 3 interhalogens can form between two halogens whose electronegativities are relatively close to one another. All attempts to form bromine heptafluoride have met with failure; instead, bromine pentafluoride and fluorine gas are produced.


Red transparent crystals which melt at Three of these will frame three bond pairs with three fluorine molecules leaving four electrons.

Chemistry of Interhalogen Compounds – P. B. Saxena – Google Books

The structures found for the various interhalogens conform to what would be expected based on the VSEPR model. The halogens react with each other to form interhalogen compounds. The molecule is a pentagonal bipyramid.

MOB20 View Course list. Chemistry of the Elements 2nd ed.


All are polar due to difference in their electronegativity. How are interhalogen compounds formed? Chlorine and bromine can each bond to five fluorine atoms, and iodine can bond to seven. Certain Properties of Interhalogen Compounds. Smaller interhalogens, such as ClF, can form by direct reaction with pure halogens.

Retrieved February 27, Halogen atoms react specifically to frame interhalogen compound. This method of production is especially useful comppounds generating halogen fluorides.