What are the approximate bond angles?

CCl4

BCL3

CF4

SF2

NI3

CCl2F2

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Best Answer - Chosen by Asker

CCl4, CF4 and CCl2F2 come under the same category. The carbon atom is surrounded by four electron pairs and all the electron pairs are the bonding pairs. Therefore they have the tetrahedral shapes with the approximate bond angles of 109.5 degree.

For NI3, the nitrogen atom is surrounded by four electron pairs but there are three bonding pairs and one lone pair. Therefore, the shape of NI3 is trigonal pyramidal. The repulsive force between lone pair - bond pair is greater than the bond pair - bond pair. Hence the bond angle is slightly smaller than 109.5. The approximate bond angle is about 107 degree.

For SF2, the sulphur atom is surrounded by four electron pairs but there are two bonding pairs and two lone pairs. Therefore, the shape of SF2 is ' V ' . The repulsive force between lone pair - lone pair is greater than between the lone pair - bond pair . Hence the bond angle is even smaller than 107. The approximate bond angle is about 104.5 degree.

For BCl3, the boron atom is surrounded by three electron pairs and the three electron pairs are all bonding pairs. Therefore the shape of BCl3 is trigonal planar and the bond angle is 120 degree.