📦 haribo's chem notes,

bent's rule extended vsepr

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further chem
Bent’s rule: more electronegative atoms prefer orbitals with less -character

  • -character orbitals more electronegative tend to draw electrons into the nucleus
  • whereas -character orbitals are more electropositive, weaker, and further away from the nucleus

for example in sp3d trigonal bypiramidal:

  • the axial positions have 50% character (formed by and )
  • the equatorial positions are formed by mixing , , and orbitals 33%

so in , fluorine would take axial positions

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