Here we will certainly learn just how to determine the hybridization of I3-. One an essential thing the students need to remember is the I3− is a straight anion. That is created by the bonding the I2 through I− ion. Here I− ion will be the donor and also I2 molecule will be the acceptor where electrons space usually accommodated in the empty d orbitals. I3- ion is usually sp3d hybridized.

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Name the the MoleculeTriiodide ion
Molecular FormulaI3-
Hybridization Typesp3d
Bond Angle180o

What is the Hybridization of Triiodide ion?

To understand the hybridization the Triiodide ion, we have the right to use simple hybridization formula i beg your pardon is given as;

If we look in ~ the iodine atoms there are seven valence electron in its external shell and also two monovalent atoms are also present. Further, throughout the combination of Iodine through the two various other Iodine atoms, the central atom gains a negative charge whose worth will it is in taken together 1.

If we place or instead of the values according to the formula, we get




Therefore the hybridisation number is same to 5. Currently we can say the hybridisation is sp3d.

Alternatively, we can also determine the hybridization of I3- by knowing the variety of valence electrons and lone pairs and also calculating their sum. In this case, if we take into consideration the lone bag there space 3 such pairs while the variety of atoms donating valence electrons is 2. If we include these values together we acquire 5 which have the right to be interpreted as sp3d hybridisation.

Important Points come Remember

I3- is created by the bonding that I2 through I− ion.During the mix of Iodine atoms, the main atom gains a an unfavorable charge whose value will it is in 1.I− ion is the donor and also I2 molecule is the acceptor. Electron are greatly accommodated in the empty d orbitals.

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I3- molecular Geometry and Bond Angles


I3- molecular geometry is linear. While there space three Iodine atoms, one of the atoms has a negative charge which more gives 3 lone bag of electrons and also 2 shortcut pairs. The steric number will certainly be 5. The three lone pairs will certainly repel every other and also take up equatorial positions. The staying two Iodine atoms room at 180o from each other.