Which of the following molecules will have allowed pure rotational transitions a

Question

Which of the following molecules will have allowed pure rotational transitions and at least one Q-branch in its vibration-rotation spectrum? Circle all that apply. H2O NO_2 CO_2 CBr_4 CH_3CI HCI A representation of one of the occupied pi MOs formed by the p_z orbitals of the C atoms in hexatriene is shown. If the C atoms are labeled 1-6 from left to right, what change will occur in the C_1-C_3 bond length when an electron is ionized from this orbital? increase decrease no change not enough information

Explanation / Answer

4. The molecules with permenant dipoles will show rotational spectra.

Among the given molecules - H2O, NO2, CH3Cl, and HCl will show rotational spectra as those are having permenant dipole moment.

5) If pi electron is ionized from orbital, it can show increasing bond length as the double bond nature is decreasing.

Therefore, the answer is - a)

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