2. In an IR spectrum ,a peak between 2000 - 2500 cm should correspond to a functional group? (а) -ОН (b) С-С c) C=0

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Based on the IR stretching frequencies values listed choose the best molecule from the set that matches the information. (a) 3095, 2980, 2965, 1685, 1600, 1510 cm¹ (b) 3300 (br), 2980, 2970, 1715 cm¹ OH (c) 3300 (br), 2980, 2970 cm¹ - OH OH (d) 2980, 2970, 2850 (m), 2750 (m), 1715 cm³ NH e z Br OH OH H

Which is the correct order of increasing wave number of the stretching vibrations of (1) C-O, (2) 0-H (alcohol), (3) C=N and (4) C=C (alkyne)? *

Which molecules below are rotational Raman active and which are inactive. O3 CH4 NH3 H2 H2O SiH4 CF6 C4H10

how do i solve this with the table for inorganic chemistry   a) determine the order of the group b) determine irreducible representations for C-O stretching vibrations in the following molecule T = [   ]A1 +  [   ]A2 +  [   ]E' +  [   ]A1'' +  [   ]A2'' + E''     c) determine the number of IR active C-O stretching vibrations in the above molecule   There are [     ] IR active C-O stretching vibrations.     [   ] equals blank

Match the region of the electromanetic spectrum with the type of chemical spectroscopy.    Nuclear magnetic resonance (NMR) - electron and proton resonance Options: X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    Raman spectroscopy-molecular rotations  options:  X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    Electron excitation (energy level changes) Options: X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    IR spectroscopy - molecular vibrations  Options:  X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    Ionization  Options:  X-rays  Microwaves Infared Radio waves Ultraviolet and visible light

Watch videos (LINKS) on page 2 and answer questions One infrared spectra (1) is given below. (a) Analyze the spectra and tabulate important bands. (b) Circle the possible molecular structure corresponding to the given spectra. Spectra A: 4000 2700 cm ¹ 2700- 2000 cm ¹ 2000 1600 cm 1600 - 400 cm ¹ 2.5 100 80 Region 60 40 20 0 OL 4000 (a) COMPOUNDS A OH 3500 3 -1 3000 B Absorption, cm -1 3.5 4 2500 4.5 SPECTRA 1 CH, O CH, C C CH, H H NO H wavelength (um) 5 5,5 6 2000 1800 1600 wavenumber (cm) wavelength (um) C Functional group CIC C-OH CH, 7 8 1400 1200 D 9 10 n 1000 CH₂CH₂OH - 11 Base Value 12 13 14 15 16 800 600 E Jun CH₂-C-N

What stretching frequencies (in cm-¹) are present in the structure below? 1715 1745 1800 CI

3. State which of the following molecules have (a) rotational absorption spectra, i.e. are rotationally active, (b) vibrational absorption spectra, i.e. are vibrationally active: N2, HF, CS2, SO2, SO, C6H6.