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VESPR Shapes

QuestionAnswer
AX2 linear
AX3 trigonal planar
AX4 tetrahedral
AX5 trigonal bipyramidal
AX6 octahedral
A stands for central atom
X stands for surrounding atom w bond
E stands for lone pairs
Higher bond orders... -have higher electron densities, -causing greater electron repulsion, -requiring more space. -(1 is <120 on trig planar)
Lone pairs... -are less constrained -so they take up even more space -(1 is 95 on trig planar)
Linear ideal angle 180
Trigonal Planar ideal angle 120
Bent Trigonal Planar angle <120
Tetrahedral ideal angle 109.5
Trigonal Pyramidal ~107.3
Bent Tetrahedral ~104.5
How many bonds does hydrogen have? Always one
How many bonds do halogens have? Normally one
How many bonds does oxygen have? Almost always 2, sometimes 1.
How many bonds does nitrogen have? Normally 3, sometimes 4.
How many bonds does carbon have? Normally 4, besides CO.
Created by: matt46
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