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Consider the Lewis structure of IF2−, what is the bond angle between F─I─F?
A. = 109.5o
B. < 109.5o
C. = 180o
D. = 120o
E. < 120o
The bond angle in molecules are determined by the shape or geometry of the structure of the molecule. Its shape could be predicted using concepts of the valence-shell electron pair theory of repulsion. This is the theory of repulsion between the nonbonding and bonding valence electrons within the molecules.
HERE Bents rule applies, which states that an electronegative atom prefers bind at the axial position of a trigonal bipyramidal structure.