Question

4. F-CI-F- bond angle in CIF: molecule is------
a) 87036
b) 90°
c) 104°27'
d) all the above

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Answer 1

Answer:

c) 104°27' is the angle between F-Cl in the F-Cl-F bond

Answer 2

F-CI-F- bond angle in CIF: molecule is b) 90°.

Explanation:

• The molecular geometry includes only bond pairs, so the molecular shape is bent with a theoretical bond angle of 109.5°. (The actual F–C–F bond angle is only 104.5° due to repulsion by the lone pair electrons.)
• The $Cl F^{3}$ molecule is T-shaped.
• The electron geometry of chlorine trifluoride is a triangular dipyramid with a 175° F–Cl–F bond angle.
• ClF3 shows tri-plane geometry due to lone pair on Cl atom.
• Lone pair-bond pair repulsion causes the bond angle to shrink and so the bond angle will be 107.5° instead of 109.5° (for perfect tetrahedral geometry).