VSEPR Shapes!!!!! Flashcards
what is E?
number of lone pairs (2 electrons = 1)
what is X??
number of attached atoms directly bonded to central atom (not the same as number of bonds)
E + X = 2
linear!!
E + X = 3
trigonal planar
E + X = 4
tetrahedral
E + X = 5
trigonal bipyramidal
E + X = 6
octahedral
E + X = 7
pentagonal bypyramidal
E = 0, X = 2
linear <3
E = 0, X = 3
trigonal planar
E = 1, X = 2
bent
E = 0, X = 4
tetrahedral
E = 1, X = 3
trigonal pyramidal
E = 2, X = 2
bent
E = 0, X = 5
trigonal bipyramidal
E = 1, X = 4
seesaw!
E = 2, X = 3
T-shaped
E = 3, X = 2
linear
E = 0, X = 6
octahedral
E = 1, X = 5
square based pyramidal
E = 2, X = 4
square planar
E = 0, X = 7
pentagonal bipyramidal
trends - bipyramidal
always have odd number of X, bonded atoms
exceptions; 3 bonds, 2 pairs = T-shaped
3 bonds, no lone pairs = trigonal planar
always odd number bonds on same page, equal number of bonds in and out of the page
trends - linear vs bent
linear if 2 bonds, and either no lone pairs or if lone pairs between the bonds on either side
bend if 2 bonds and lone pairs between on only one side (1 or 2 lone pairs then bent)
