From the list of molecules below, select those that are classified as "spherical rotors". CgHg, cubane (cubic symmetry) CHC13, chloroform CH₂Cl2, methylene chloride CC14, tetracholomethane C6H6, benzene
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- An electron in the 7 orbital of ethylene (C,H,) is excited by a photon to the * orbital. Do you expect the equilib- rium bond length in the excited ethene molecule to be greater or less than that in ground-state ethene? Will the vibrational frequency in the excited state be higher or lower than in the ground state? Explain your reasoning.The ClO2 molecule (which belongs to the group C2v) was trapped in a solid. Its ground state is known to be B1. Light polarized parallel to the y-axis (parallel to the OO separation) excited the molecule to an upper state. What is the symmetry species of that state?7. Consider the Jablonski diagrams below, where So, S₁, and S2 are all singlet electronic states, and T₁ is a triplet electronic state. (So is the electronic ground state.) The horizontal lines indicate the vibrational energy levels in each electronic state. The arrow drawn on the diagram represents the absorption of a UV photon with = 250 nm, promoting the molecule to a high vibrational level in the S₁ state. (The wavelength values here and below are meant as a guide, but this is not really a quantitative question.) Two different processes are described below the diagrams. Read each one, and then draw an appropriate set of arrows on the corresponding diagram to represent the process described. E Diagram #1 - Fluorescence process S₂ S₁ So SS5 T₁ Vo V4 V3 55555 V₂ V₁ V₁ Diagram #2 - Phosphorescence process E S₂ S₁ So 55555 Vo T₁ 7.1 Diagram #1: After the absorption shown in the diagram, the molecule fluoresces, emitting a photon with = 310 nm. ラララララ 7.2 Diagram #2: After the absorption…
- What is the maximum possible degree of degeneracy of the orbitals in 1,4-dichlorobenzene?This question pertains to the heteronuclear diatomic 1H19 Given that the bond length of 1H19F is 0.91 angstrom (1 angstrom = 10-10m), calculate the moment of inertia. Calculate the rotational constant (in J) for the diatomic in part a. Using your value for the rotational constant in part b, determine the energy of the transition from state 3 to state 4 (in J). Do you expect the energy of the transition from state 3 to state 4 for 2H19F to be larger or smaller than what you computed in part c, assuming that the bond length does not change? Explain your choice based on the relevant equations, or calculate the energy for this transition. Steps 1, 2 and 3 have already been found. I need help with the last question only but I haven't been able to get it solved since there can only be three questions answered. The following answers for step 1-3 are below. 1. moment of inertia = 1.30 × 10-47 kgm2 2. rotational constant = 21.5 cm-1 3. Energy required from transition n= 3 to n= 4 is…4G I 5:53 2.30 O Yo 40 52% KB/s 1. The C-C stretch in allene (H,C-C=CH,) is about 1650 cm'; the C-H stretch is about 3,100 cm". Calculate the corresponding wavelengths (in nm) and energies (in kJ/mol) of these vibrations. () II
- The rotational spectrum of CH* has been observed in the planetary nebula NGC 7027." The spectrum shows a series of lines separated by 29.64 cm1. Calculate the bond length of CH*. Take the reduced mass of CH* to be 0.9299 g/mol. Give your answer in angstroms with two decimal places. Answer:Indicate the quantum numbers of the molecular electronic terminals. Diferenciarlos de los ayómicos.Inversion is not a symmetry operation of methane.Explain.
- The chlorophylls that participate in photosynthesis and the haem (heme) groups of cytochromes are derived from the porphine dianion group (8), which belongs to the D4h point group. The ground electronic state is A1g and the lowest-lying excited state is Eu. Is a photon-induced transition allowed from the ground state to the excited state? Explain your answer.Please don't provide handwritten solution ....ClO2 is a nonlinear molecule with one unpaired electron. The ground-state has a B1 symmetry. The molecule has been trapped (immobilized) in a solid matrix, lying in the yz plane. Its electronic absorption spectrum showed an allowed transition when using light polarized in the y-direction. To what electronic state was the molecule excited? Justify your answer.
