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viktelen [127]
3 years ago
12

Why is BrCl5 nonpolar when it's Asymmetrical? Aren't symmetrical molecules suppposed to be polar?

Chemistry
2 answers:
Svet_ta [14]3 years ago
8 0
Although there exists a dipole moment in the molecule, I guess its nonpolar because the dipole is very small as the electronegativity difference between the Br and Cl is very low and so it can be neglected.
Mars2501 [29]3 years ago
4 0

Answer:

BrCl₅ is an asymmetrical molecule because it has one lone pair and five atoms bonded to the central atom. Due to low difference of electronegativities, BrCl₅ is a nonpolar molecule.

Explanation:

According to the Linus Pauling scale, the difference between their electronegativities Δx can be determined if the link will be:

  • polar: 0 ≤ Δx ≤ 0.4
  • nonpolar: 0.5 ≤ Δx ≤ 1.6
  • ionic: 1.7 ≤ Δx ≤ 2.0

Br-Cl bonds are nonpolar because the difference between their electronegativities is:

Br: 2.96

Cl: 3.16

Δx= 3.16 - 2.96 = 0.2

BrCl₅ has nonpolar bonds.

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