Problem: Bromine pentafluoride, BrF5, is sometimes used as a rocket propellant. Clearly one would like to know quite a bit about the chemical nature of this compound in order to predict how it might behave when loaded into a rocket. Therefore, to answer the questions in this problem, you will need to draw the Lewis structure of bromine pentafluoride. Part AWhat is the electron - domain (charge - cloud) geometry of BrF5? Part BWhat is the molecular geometry of BrF5? Part CIgnoring lone pair effects, what is the smallest bond angle in BrF5? Express your answer as an integer.Part D What is the hybridization about the central atom in BrF5? Express your answer in analogy to the following example: sp^2.Part E Which choice best describes the polarity of BrF5? a) polar bonds / polar molecule b) polar bonds / nonpolar molecule c) nonpolar bonds / polar molecule d) nonpolar bonds / nonpolar molecule

FREE Expert Solution

The possible electron pair and molecular geometries are:



Step 1: Central atom→ Br (less electronegative than F)


Step 2: Total valence e-


Br      1 × 7 e = 7 e

F       5 × 7 e = 35 e

Total:  42 valence e


Step 3: Lewis Structure 


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Problem Details

Bromine pentafluoride, BrF5, is sometimes used as a rocket propellant. Clearly one would like to know quite a bit about the chemical nature of this compound in order to predict how it might behave when loaded into a rocket. Therefore, to answer the questions in this problem, you will need to draw the Lewis structure of bromine pentafluoride. 

Part A

What is the electron - domain (charge - cloud) geometry of BrF5

Part B

What is the molecular geometry of BrF5

Part C

Ignoring lone pair effects, what is the smallest bond angle in BrF5? Express your answer as an integer.

Part D 

What is the hybridization about the central atom in BrF5? Express your answer in analogy to the following example: sp^2.

Part E 

Which choice best describes the polarity of BrF5

a) polar bonds / polar molecule 

b) polar bonds / nonpolar molecule 

c) nonpolar bonds / polar molecule 

d) nonpolar bonds / nonpolar molecule

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Our tutors have indicated that to solve this problem you will need to apply the Electron Geometry concept. You can view video lessons to learn Electron Geometry. Or if you need more Electron Geometry practice, you can also practice Electron Geometry practice problems.

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Based on our data, we think this problem is relevant for Professor Chibba & Davis' class at McMaster University.