Brcl3 lewis structure, Characteristics:13 Must To Know Facts

This article is about Brcl3 lewis structure and its characteristics and related properties.

Brcl3 lewis structure represented interhalogen compounds. Brcl3 lewis structure consists of two halogen elements.

To better understand how molecules are formed, brcl3 has been drawn in a Lewis structure. Interhalogen molecules are composed of two halogen atoms and no other atoms and are often covalent.

How to draw Brcl3 lewis structure?

In the brcl3 lewis structure, the bromine atom which is most electronegative and has the property to expand its octet goes to the center of the molecules.

Due to the expanded octet of bromine, you will add more than eight electrons in its octet, if you will see there is 28 total valence electron in the brcl3 lewis structure. 

For drawing the lewis structure of brcl3 follows the following step:

  1. First, count the total valence electrons in the compound Brcl3.
  2. Bromine belongs to the halogen family consisting of seven valence electrons and in the same family, fluorine consists of seven valence electrons.
  3. Put the Bromine(because of the expanded octet) in the center and fluorine around it.
  4. Now, assign the valence electrons around these atoms( out of 28valence electrons 24 are used to complete the octet of fluorine with 3 lone pairs of electrons and 3 single bonds with bromine atom and 4 valence electrons remain on the bromine as in form of lone pair).

Brcl3 lewis structure resonance

In Lewis structure of Brcl3 is composed of 28 valence electrons. By knowing how many Brcl3 atoms there are, we can distribute the valence shell as evenly around the nucleus as possible. 

Brcl3 shows no resonance.

Brcl3 has three chlorine atoms that make up the bromine (Br) atom. A bromine atom (Br) is positioned in the center of the structure, while chlorine atoms (Cl) are scattered around it.

Brcl3 lewis structure resonance

Brcl3 lewis structure shape

The lewis structure is the simplest form of representing the valence electrons in given molecules like the Brcl3 lewis structure and shows bonded and nonbonded electrons in the compounds.

For the formation of the Brcl3 lewis structure, we required 28 valence electrons.

Compound is Brcl3, total valence electron =28

Br =7,Cl =7(7*3 =21)

Single bond = 3

Lone pair on bromine = 2

The molecules and electron density distribution are asymmetric, as a result of which their geometry changes from trigonal to T-shaped.

Brcl3 lewis structure shape

Brcl3 lewis structure having T-shaped, and this change is due to the presence of lone pairs on the central atom because they occupied more space.

This is also called the Sea-saw structure.

Sea-saw brcl3 lewis structure

Brcl3 lewis structure formal charge

When an electron is redistributed between two atoms and charge occupied by these atoms for the bonds is called a formal charge.

The formal charge = the number of valence electrons – no. of nonbonding electrons – total number of electrons shared in bonds.

FC = v – n – b/2

For the calculation part, we have to assign electrons to the Br-cl bond and each atom present in Brcl3 like bromine and chlorine atoms.

In the brcl3 lewis structure, the bromine atom is single bonded with a chlorine atom and two lone pairs are present on the central bromine, and each chlorine atom has six nonbonding electrons and two bonding electrons.

Fc on Br = 7- 4 -3 = 0

Fc on Cl = 7- 6 -1 =0

Thus the formal charge on Brcl3 molecules = Zero.

Brcl3 lewis structure angle

From the Brcl3 lewis structure, we can observe that Bromine is single bonded with chlorine and has an <90° angle and 180°.

Brcl3 lewis structure angle

This is due to the repulsion between the lone pair and lone pair being greater than the lone pair bond pair.

Brcl3 lewis structure octet rule

It involves filling the outermost shell of an element with eight electrons while remaining stable, so we call it the octet rule.

Brcl3 lewis structure octet rule

As a result of its enlarged electron cloud and the size of the bromine atom, the bromine atom in the Brcl3 Lewis structure has more than eight electrons in it, and chlorine completes its octet. Thus brcl3 lewis structure expanded its electron clouds.

Brcl3 lewis structure lone pairs

Lone pairs are the deciding factors of the geometry of a molecule because it shows some nonbonding electrons in the molecules that are present on the central atom.

In the Brcl3 lewis structure, there are bonding electrons is 3 and 2 lone pairs on the bromine atom that act as central atom and this will decide its steric no(5) means Trigonal bipyramidal geometry.

Thus Brcl3 lewis structure has lone pairs =2.

Brcl3 valence electrons

An atom’s valence electrons are those electrons that participate in bond formation in the outermost shell.

For finding the valence electrons we should write electronic configuration first and then count these in total number.

Electronic Configuration of Chlorine atom(17) = 1s22s22p63s23p5

Cl= [Ne]3s2 3p5

Bromine atom(35)= 1s2 2s22p6 3s23p63d104s24p5


Br = [Ar]4s2 3d104p5 

Bromine and chlorine are halogen atoms that lie in the 17th group.

Outermost electrons in Bromine= 7

And that of chlorine = 7 (7*3)

Total valence electrons = 7+7(3) =28

Thus valence electrons are used for bond formation by donating these electrons or accepting these electrons.

Brcl3 hybridization

Hybridization is the mixing of the same energy, same size, and shape of atomic orbitals to form new hybrid orbitals. Thus hybrid orbitals are used in VESPR theory for chemical bonding and valence bond theory.

In the Brcl3 lewis structure, the hybridization of the Bromine atom is sp3d( includes  1s, 3p, and 1d) these are on the same energy level and combine to form a five new hybrid orbital.

These orbitals are called degenerate orbitals.

Brcl3 hybridization = sp3d

According to valence bond theory, hybridization occurs brcl3 compound is combining of Br = [Ar]4s2 3d104p5 and Cl= [Ne]3s2 3p5 in their excited states.

So we can observe that

Single bond = 3 (Bond pair)

Lone pair on bromine = 2 

Total bondformed is = 3+2= 5

So the hybridization = sp3d , and the geometry of the Molecules is Trigonal Bipyramidal with T-shaped.

Brcl3 solubility

Brcl3 molecule is sparingly soluble in water.

Is Brcl3 ionic?

An interhalogen compound, Brcl3 only contains two halogen atoms and does not contain any other atoms.

Based on the studies, it is found that interhalogen compounds are unstable, and the bonding occurs on a covalent basis.

Thus in the Brcl3 lewis structure, one bromine atom is covalently bonded with three chlorine atoms.

Thus Brcl3 is a covalent compound with a molecular weight (186.26g/mol).

Is Brcl3 acidic or basic?

Brcl3 is amphoteric.

It acts as acid as well as a base in the given solution.

Is Brcl3 polar or nonpolar?

Molecules that should be polar or nonpolar can be found through differences in their electronegativity. 

Electronegativity is defined as the difference between the electronegativity of two atoms due to the generation of positive and negative charges on the ends of these atoms. This charge separation between the atoms of a molecule results in a net dipole moment and creates polarity in a molecule.

Take Brcl3, for instance. It has a T-shaped structure and has two lone electron pairs. The presence of two lone pairs on the molecule will cause the distribution of charge to be asymmetric. Polarity is a consequence of this distortion. 

So, in the Brcl3 lewis structure, the electronegativity difference between the Br-Cl bond has 0.2, which causes a net dipole moment. That dipole moment is directed towards the chlorine part of the molecule. Brcl3 exhibits all of these characteristics of a polar molecule.

Thus Brcl3 is the polar compound.


According to the above results, Brcl3 is composed of three single covalent bonds between the chlorine and bromine atoms. The sp3d hybridization of bromate and chlorine is formed by the overlap of “1s”, “3p”, and “1d” orbitals. Brcl3 lewis structure is an interhalogen compound.

Monika Saini

Hi....I am Monika. I have done Masters in Chemistry. I am a Subject Matter Expert in Chemistry. I would say that I am a very passionate writer. The main goal of my writing is to present new perspectives. I want to discover new things that I can apply to my surroundings. Let's connect through LinkedIn-

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