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Chemical Bonding and Molecular Structure
Question
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In which of the following pairs, the two species are isostructural?

  • SF4 and XeF4

  • SO32- and NO3-

  • BF3 and NF3

  • BrO3- and XeO3

Answer

D.

BrO3- and XeO3

a) SF4 = irregular tetrahedron (sp3d, one lone pair)
XeF4 = square planar (sp3d2, two lone pairs)
b) SO32- = pyramidal (sp3 one lone pair)
NO3- = trigonal  planar (sp2)
c) BF3 = trigonal planar (sp2)
NF3 = pyramidal (sp3)
d) BrO3- = pyramidal (sp3, one lone pair)
XeO3 = pyramidal (sp3, one lone pair)

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