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- What is the term symbol for the ground state of a Li, b Al,c Sc?Determine the number of total degrees of freedom and the number of vibrational degrees of freedom for the following molecules. a Hydrogen fluoride, HF b Hydrogen telluride, H2Te c Buckminsterfullerene, C60 d Phenylalanine, C6H5CH2CHNH2COOH e Naphthalene, C10H8 f The linear isomer of the C4 radical g The bent isomer of C4 radical.Where would you expect vibrations for ethyl alcohol, CH3CH2OH, to appear in a vibrational spectrum?
- Do you expect the fundamental vibrational frequency to be higher for HCl or NaCl? Explain.How many normal vibrational modes does each of thefollowing molecules have?(a) NH3(b) C2H4(c) CCl2F2(d) CH3CH2OHWhat is the order of decreasing vibrational frequency for C — Cl, C — Br, C — C, C — O and C — H ?
- 2) Based on the number of atoms N, how many normal vibrational modes does CH4 have (CH4 is non-linear) (Section 18-6- what happens when molecule absorbs light) a) 10 b) 9 c) 6 d) 5If the spacings between adjacent vibrational features in a photoelectron spectroscopy experiment decrease, changing by a factor of 1/2, when you deuterate the molecule being ionized, is it more likely that the orbital from which you are ejecting an electron is from a nonbonding orbital, a p orbital localized on a C-C or C-O bond, or a s orbital localized on a C-H bond? Explain.Calculate the number of possible vibrational modes for each of the following molecules and assign frequency ranges to each. i) NH3 ii) C2H4 iii) CCl2F2 iv) CH3CH2OH b) Which of the above molecules will absorb IR radiations most strongly? Explain your answer.
- The ammonia molecule NH3 has vibrational modes. 5 6 4 7 12Explain why the lines in the spectrum for H35Cl and H37Cl give rise to different rotational constants for the two molecules.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.