The question is whether BrF3 is either Polar or Nonpolar.

An inorganic substance having the chemical formula brF3 is bromine trifluoride. It’s categorised as an interhalogen compound because of its structure. It has a strong fragrance and seems to be a straw colour. Many college students are unsure if bromine trifluoride is a polar compound. Answering that question, as well as describing its features and potential uses, will be the focus of this article.

As far as I can tell, BrF3 is either Polar or Nonpolar It is polar because of the existence of two lone pairs on the bromine atom, which distorts the molecule’s structure or bends it in a polar direction. The molecule’s atoms have a non-uniform distribution of charge, which makes it polar.

Interhalogen compound: Bromine trifluoride It is in a liquid state with a strong odour at typical conditions of temperature and pressure.

It reacted violently with water and other organic molecules when exposed to them. Because it contains three bound fluorine atoms, it is a potent fluorinating agent.

Famous scientist Paul Lebeau made the discovery in 1906. At a temperature of 20°C, bromine and fluorine were reacted to produce it.

The reaction for the synthesis of bromine trifluoride is shown below.

Bromine (Br2) + fluorine (Fl2) = 2BrF3 (bromine trifluoride)

This molecule has a molecular mass of 136.90 g/mol. The formula is as follows:

BrF3 has a molecular mass of 136.90 g/mol, which is equal to 1 * 79.9 (mol mass of Br) x 3 * 18.9 (mol mass of F).

Bromine trifluoride contains one bromine atom and three fluorine atoms as its chemical make-up.

There are three fluorine atoms circling the centre bromine atom in this compound. Fluorine and bromine have seven valence electrons each. The outermost electron shells of both atoms contain seven electrons.

The BrF3 molecule has 28 valence electrons.

Two lone pairs remain on the bromine atom after three fluorine atoms are covalently bound to it.

In terms of electronegativity, fluorine has a value of 3.98 and bromine is at a value of 2.96. The less electronegative bromine atom occupies the centre position in the compound.

When bromine and fluorine atoms have different electronegativity, the Br-F bond is polarised with bromine as the positive pole and fluorine the negative pole.

One thing to keep in mind is that the bromine atom has two lone pairs on it, which results in the bent shape due to the electrostatic repulsion between lone pairs and bound pairs that occurs.

As a result, its atoms have a nonuniform, or uneven, charge distribution.

Is there a reason why BrF3 is polar?

One bromine atom is surrounded by three fluorine atoms in the molecule of bromine trifluoride, as previously explained in this article.

The electrical repulsion is caused by the bromine atom’s lone pairs.

The downward force on the Br-F bonds is generated by the repulsion between the lone pair and bond pairs, according to the VSEPR theory.

The electronegativity of bromine and fluorine atoms is also different, meaning fluorine is more electronegative.

The polarity of the Br-F bond is ensured by the electronegativity difference between bromine and fluorine atoms.

It is impossible for the dipole moment of a polar connection to be 0 in nature. Similarly, the dipole of each of the three Br-F compounds has a non-zero value.

Moreover, the net dipole of the molecule is nonzero, with the fluorine side of the molecule originating from the Br side of the molecule.

Polar Br-F bonds in the structure of the molecule result in a polar molecular structure.

Molecules with polar and nonpolar atoms

The various sorts of interatomic forces keep the molecules in place. An ionic, covalent or hydrogen bonding force may also be present.

Let’s see how polar and nonpolar molecules differ.

It is a polar molecular.

These molecules’ dipole moments are never zero. The polarity of a molecule is determined by its dipole.

A polar bond’s electronegativity is determined by the electronegativity of the atoms in the bond.

Atoms with different levels of electron density become partially positive and partially negative. To generate positive and negative charges in the molecule, this method is used.

Polar molecules have symmetrical shapes, while nonpolar molecules have symmetrical shapes.

Polar compounds include HBr and H2O, to name a few. HBr’s polarity can be explained by looking into its origins.

molecules with no polarity

In terms of dipole moment, these molecules always have zero.

When two atoms make a nonpolar link, their electronegativity is usually equivalent.

Nonpolar molecules have a symmetrical geometrical shape.

Hexane and NO2+ are examples of nonpolar compounds. The explanation for NO2non-polarity +’s can be investigated.

A molecule’s polarity can be determined by looking at certain properties.

An atom’s electronegativity is its ability to attract the bound electron pair to its side, which is called electronegativity.

When the electronegativity of two atoms forming a covalent connection differs, the bond is more likely to have a polar character.

Because the linked electron pair is closer to the more electronegative atom, it receives a partial negative charge.

Fluorine, which is more electronegative, gets a partial negative charge in the BrF3 molecule.

Measurement of polarity is known as dipole moment. The formula is as follows:

D is equal to Q times R.

“D” refers to the dipole’s moment

Q = atomic charges

A positive and a negative charge are separated by a distance of R.

If you add up both positive and negative charge centres, you’ll get the total number of charges.

In the International System of Units (SI), the debye is symbolised by the letter D.

Polarity of molecules can be determined by several factors, one of which is a molecule’s geometrical form.

Nonpolar molecules are typically found to have symmetric structures, whereas nonpolar molecules tend to have asymmetrical structures.

Because of its asymmetrical structure, bromine trifluoride has a non-uniform charge distribution.

Breathability factor 3 (BrF3)

At room temperature, it is a straw-colored liquid.

It has an overpowering aroma.

This material has a density of around 2.803 g/cm3.

In terms of melting point and boiling point, it is 8.77 degrees Celsius or 47.79 degrees Fahrenheit.

Chemically, it interacts aggressively with water and is readily soluble in sulfuric acid (H2SO4).

BrF3 applications

Nuclear fuel processing can greatly benefit from its use in the production of uranium-hexafluoride (UF6).

The fact that it’s a potent fluorinating agent means it’s used in a slew of chemical reactions.

Moreover, this chemical is a potent inorganic ionising solvent.


Two lone pairs on bromine atoms cause the structure of bromine trifluoride (BrF3) to be curved.

The VSEPR theory says that it has a distorted form (bent shape). Due to the polarity of the Br-F bond, the electronegativity of bromine and fluorine is significantly different.

Br-F bonds have a twisted form and polarity because of this. Uneven distribution of charge is found across the molecule as a whole. Therefore, Brf3 is polar in structure.

Let us know in the comments area if you have any further queries. We’ll do everything we can to get back to you right away.

Read more: What is the polarity of BF3?

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


Please enter your comment!
Please enter your name here

Read More