Polyatomic IR Spectrscopy

Question 1

Gross selection rule polyatomic IR spectroscopy

Answer 1

Dipole moment must change during vibration

Question 2

Specific selection rule polyatomic IR spectroscopy

Answer 2

Δv = +-1, +-2, etc

Question 3

What is a parallel transition

Answer 3

Transition dipole s parallel to molecule principle axis

Question 4

What is a perpendicular transition

Answer 4

Transition dipole is perpendicular to principal axis

Question 5

What branches do parallel transitions have

Answer 5

P and R

Question 6

What branches do perpendicular transitons have

Answer 6

P, Q and R

Question 7

What does line spacing of Q branch depend on

Answer 7

Rotational constants