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- Determine the number of total degrees of freedom and the number of vibrational degrees of freedom for the following species. a Hydrogen sulfide, H2S b Carbonyl sulfide, OCS c The sulfate ion, SO42 d Phosgene, COCl2 e Elemental chlorine, Cl2 f A linear molecule having 20 atoms g A nonlinear molecule having 20 atomsFind the number of vibrational modes for the following molecules: NH3, CH4, and C₁0Hg.But molecules combine both vibrational and rotational states in such a way that both selection rules must be satisfied if we are only talking about absorption or emission of electromagnetic radiation (i.e. photons). 5 1 images from Krane Ch 9. Relative absorption : 0.330 L=3 to L=2 L=2 to L = 1 Electronic excited state. Electronic ground state L→ L-1 L = 1 to L = 0 Ť 0.340 0.350 SE Energy (eV) 2B 0.360 : hf L=0 L=1 L=2 to to to L = 1 L = 2 L = 3 Photo 4 1 3 1 2 1 1 0 1 1 5 0 4 0 30 20 1 0 0 0 LN L→ L+1 0.370 0.380 no emission here because AL # 0, AL = +1 AN = ±1, HCI spectra. In the middle of the gap is the energy hf that would correspond to a pure vibrational transition, which would violate the rotational selection rule. What is the value of hf for the HCI spectra?
- Determine the vibrational modes of selected molecular movements (in the text, cis-ML2(CO) 2 and trans-ML2(CO) 2 are used as examples)the total number of vibration for HNF, * ЗА + ЗА " 2A' + 4A " O A' +4A " 11 4A' + A" 4A " +2A 11Explain why the lines in the spectrum for H35Cl and H37Cl give rise to different rotational constants for the two molecules.
- This question pertains to rotational spectroscopy. Which of the following molecules would have a pure rotational spectrum and why? HCl, N2O, O3, SF4 What information is obtained from the rotational spectrum of a diatomic molecule and how can it be used to determine the bond length of a diatomic molecule? What is the selection rule for rotational spectroscopy? The rotational constant of 127I35Cl is 3.424 GHz. Calculate the ICl bond length.The force constant of 79Br79Br is 240 N.m−1 . Calculate the fundamental vibrational frequency and the zero-point energy of 79Br79Br.The vibrational frequency of the ICl molecule is 1.15 ×1013 s-1. For every million (1.00 × 106) molecules in the ground vibrational state, how many will be in the first excited vibrational state at a temperature of 300 K?
- 1. This question pertains to rotational spectroscopy. a. What information is obtained from the rotational spectrum of a diatomic molecule and how can it be used to determine the bond length of a diatomic molecule? b. What is the selection rule for rotational spectroscopy? c. The rotational constant of 127I35Cl is 3.424 GHz. Calculate the ICl bond length.1. Determine the number of translational, vibrational, and rotational degrees of freedom available to the molecule NH3. 2. Calculate the rotational constant (B) for the molecule H12C14N, given that the H-C and C-N bond distances are 106.6 pm and 115.3 pm respectively.What are the total number of degrees of freedom and the number of vibrational modes for ethanol C2H6O?