PPT Slide

40

• Molecules with 3 bonding groups and 2 lone pairs are T shaped (AX 3E2).

• Bromine trifluoride (BrF 3)  has this shape.

• Molecules with 2 bonding groups and 3 lone pairs have the bonds in  axial positions, giving the molecule a linear shape (AX 2E 3)

• The axial atom-to-central atom-to-axial atom  (X–A–X) bond angle is 180° .

• The triiodide ion (I 3–) is  AX 2E 3 and so is linear:

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