Shapes of Molecules and Bond Angles Notes on the shapes of molecules and the bond angles. With examples 3.5 / 5 based on 3 ratings ? ChemistryBonding & shapesASOCR Created on: 11-11-12 22:13 Shapes of Molecules and Bond Angles 1 Linear - 2 bond pairs, 0 lone pairs, 180° (e.g.- BeCl2) 1 of 7 Shapes of Molecules and Bond Angles 2 Trigonal Planar- 3 bond pairs, 0 lone pairs, 120° (e.g.-BF3) 2 of 7 Shapes of Molecules and Bond Angles 3 Tetrahedral- 4 bond pairs, 0 lone pairs, 109.5° (e.g.- CH4) 3 of 7 Shapes of Molecules and Bond Angles 4 Trigonal Bipyramidal- 5 bond pairs, 0 lone pairs, 120° and 90° (e.g.- PF5) 4 of 7 Shapes of Molecules and Bond Angles 5 Octahedral- 6 bond pairs, 0 lone pairs, 90° (e.g.- SF6) 5 of 7 Shapes of Molecules and Bond Angles 6 Pyramidal- 3 bond pairs, 1 lone pair, 107° (e.g.- NH3) the lone pair of electrons reduces the bond angle by 2.5° and 'squash' the hydrogen atoms down slightly 6 of 7 Shapes of Molecules and Bond Angles 7 Angular- 2 bond pairs, 2 lone pairs, 104.5° (e.g.- H2O) as we've said, a lone pair of electrons reduce the bond angle by 2.5°. As there are 2 pairs here, the bond angle is reduced by 5° 7 of 7
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