Study sheet: Regular Molecular Shapes

📋 Course Outline

1. Bond Pairs and Molecular Shapes

📖 1. Bond Pairs and Molecular Shapes

📝 Essential Points

• Two bond pairs produce a linear shape with a bond angle of 180°; the example is BeCl3.

• Three bond pairs produce a trigonal planar shape with a bond angle of 120°; the example is AlCl3.

• Four bond pairs produce a tetrahedral shape with a bond angle of 109.5°; the example is CH4.

• Five bond pairs produce a trigonal bipyramidal shape with bond angles of 90° and 120°; the example is PCl5.

• Six bond pairs produce an octahedral shape with a bond angle of 90°; the example is SF6.

📊 Synthesis Tables

Regular Shapes by Bond Pairs

Bond pairs	Shape	Bond angle	Example
2	Linear	180°	BeCl3
3	Trigonal planar	120°	AlCl3
4	Tetrahedral	109.5°	CH4
5	Trigonal bipyramidal	90° and 120°	PCl5
6	Octahedral	90°	SF6