Chemical Bonding and Molecular Structure

Chemical Bonding and Molecular Structure

Question

In which of the following pairs the two species are not isostructural?

  • CO32- and NO3-

  • PCl+4 and SiCl4

  • PF5 and BrF5

  • AlF63- and SF6

Answer

C.

PF5 and BrF5

i) CO32- and NO3- = Triangular Planar (sp2)
ii) PCl+4 and SiCl4  = Tetrahedral (sp3)
iii) PF5 and BrF5   = Tetrahedral (sp3)
iv) AlF63- and SF6 = sp3d2 hybridized, octahedral

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