Lecture 14

Question 1

boxed wave functions

Answer 1

for a particle in a box
sine waves locked on a line
energy increases as the number of nodes increase

Question 2

wavefunctions

Answer 2

for atoms = complicated
can have direction (px,py,pz)
spherical symmetry
molecules have shapes

Question 3

LCAO

Answer 3

linear combination of atomic orbitals

Question 4

schrodinger’s equation

Answer 4

solution of the equation can be approximated by combining the combination of the solution wells
combine them by positive or negative

Question 5

hydrogen

Answer 5

1s orbital
the solution to H2+ as the sums and differences of two !s orbital (LCAO)
look at diagram

Question 6

constructive interference

Answer 6

more delocalisation, low energy, bonding orbitals

Question 7

destructive interference

Answer 7

less delocalisation, higher energy, antibonding orbitals

Question 8

bonding orbitals

Answer 8

adding electrons, strengthens the bond

Question 9

antibonding orbital

Answer 9

adding electrons, weakens the bond

Question 10

MO diagram

Answer 10

check notes

Question 11

bond order

Answer 11

1/2 (BO - ABO)

Question 12

LCAO rules

Answer 12

% of spatial overlap between orbitals, stronger the bonding
better energy match between orbitals, stronger the bond