Explain the observations in the IR of the following stereoisomers. OH Show two bands: HO at 3772 cm and at 3633 cm Show only one band at 3630 cm -1
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- Show that h*c= 1240 eV*nmShown below are C-O stretching frequencies for complexes of the type Rh(CO)(PR3)2C1, where PRз is P(p-C6НАF)з, Р(p-C6HaMe)з, P(-С4Но)з, оr P(C6F3)3: v(СО), сm-1: 1923, 1965, 1984, 2004 Match the infrared bands with the appropriate phosphine complex.Explain why i) the 1'F-NMR spectrum of SF4 consists of two 1:2:1 triplets of equal intensity and ii) the "Se-NMR spectrum of SeF, consist of a triplet of triplets ('Se, I = 77 77
- -1 b) In IR spectrum of CO a strong vibrational transition is observed at 2143.29 cm¹ with a weak transition at 4259.66 cm. What is vibrational wave number and anharmonicity constant CO?(b) Based on the following reactions, 1. OsO4 F 2. NaHSO3, H2O 1. O3 G 2. Zn, H20 (1) propose the structures of F and G. (ii) determine the important absorption bands with their approximate wavenumber (cm1) in the IR spectra of the products (F and G) compared to their starting materials.6. The carbonyl stretching frequency for one of the following compounds is 1685 cm²¹. Which one and briefly explain.
- Arrange the following compounds in order of increasing wavenumber of the C=0 absorption band. I. I. II. А. I, II, II В. П, Ш, І С. Ш, II, І D. I, III, II Е. II, І, IIGive a detailed explanation of how Raman spectroscopy protocol will be used to process a sample of palm oil adulterated with Sudan IVWhich of the following match with IR-spectroscopy? * O Nuclear excitation Electronic excitation O Molecular vibration Molecular rotation
- 12. The following questions can be answered IR, Raman, both, or neither. Which technique can be used to observe the following vibrations? a. Scissoring of CF4? b. Ring breathing of benzene? c. asymmetric stretch of XeF2? d. stretching of BrF? Br-F e. stretching of F2? F-F19:25 LTE 1 12D.15 At low resolution, the strongest absorption band in the infrared absorption spectrum of 12C160 is centred at 2150 cm-¹. Upon closer examination at higher resolution, this band is observed to be split into two sets of closely spaced peaks, one on each side of the centre of the spectrum at 2143.26 cm-¹. The separation between the peaks immediately to the right and left of the centre is 7.655 cm¹. Make the harmonic oscillator and rigid rotor approximations and calculate from these data: (a) the vibrational wavenumber of a CO molecule, (b) its molar zero-point vibrational energy, (c) the force constant of the CO bond, (d) the rotational constant B, and (e) the bond length of CO.(d) Explain, why [Co(H,O)62+ is pale pink 2 max = 10 cm mol-) la12- whereas C C1 is deep'blue (Emax = 600 cm mol). (3) %3D max Predict the possible transitions in cach case.