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How would you account for the following ? ClF_3 molecule has a T-shaped structure and not a trigonal planar one. |
Answer» Solution :The central atom Cl has seven electrons in the VALENCE shell. Three of these form electron PAIR bonds with three fluorine atoms leaving behind four electrons. Thus there are three bond pairs and two lone pairs. According to VSEPR THEORY, these will occupy the corners of a trigonal bipyramid. The two lone pairs will occupy the equatorial POSITIONS to MINIMISE lone pair - lone pair and bond pair - lone pair repulsions which are greater than bond pair - bond pair repulsions. The shape of `ClF_3` is that of a bent T. 
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