So I'm studying chemistry and wondering if any of the geometry names in VSEPR, like linear, trigonal planar, square planar, etc., change if you use a double or triple bond instead of single bonds? Are there any examples of such a thing happening? I tried it using a PhET simulation, but couldn't notice any change at all.
VSEPR theory classifies molecules based on the number of bonding/lone pairs surrounding the central atom to determine approximations in bonding angles. Because the repulsion forces between double and triple bonds are not significantly greater than single bonds, they are treated as single bonds.
Quoted from Wikipedia:
In VSEPR theory, a double bond or triple bond is treated as a single bonding group.
For example, sulfur trioxide & methanal are considered to be 'trigonal planar', and carbon dioxide, beryllium hydride and hydrogen cyanide HCN are considered to be 'linear'.