Worksheet: Microwave Spectra of Diatomics

In this worksheet, we will practice calculating diatomic rotational constants from the P, Q, and R branches of microwave spectra.

Q1:

Which of the following molecules will not exhibit a microwave rotational absorption spectrum?

  • A C l 2
  • B H B r
  • C H C N
  • D H O 2

Q2:

Which of the following molecules will not exhibit a microwave rotational absorption spectrum?

  • A H C l
  • B C H C l 3
  • C C O 2
  • D H O 2

Q3:

An absorption spectrum for the diatomic molecule hydrogen iodide (HI) appears in the microwave region. Which transitions are most likely responsible for this spectrum?

  • APure rotational transitions
  • BPure vibrational transitions
  • CMore information is needed.
  • DElectronic transitions

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