Explain what a symmetric stretching vibration and an antisymmetric stretching vibration consist of.

What type of stretching results in IR absorption?

12. Without performing any calculations, identify which stretching vibration will have the higher frequency in each of the following pairs. Explain. (a) C-O vs. C=O (b) H-Cl vs. H-Br

10)  For each spectrum, give the following: What type of spectroscopy produces a spectrum that looks like that What type or types of energy transitions are involved (i.e. electron going from one atomic orbital to another, molecule going from a lower vibrational state to a higher vibrational state, etc.) What quantum mechanical model or theory provides a description for the type of spectroscopy (i.e. harmonic oscillator model, molecular orbital theory, etc.) What part of the electromagnetic spectrum is absorbed or emitted by the energy transitions for the type of spectroscopy Describe what information this type of spectroscopy can give us about an atom or molecule and how the spectrum is interpreted

Aa.53.

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

Which irreducible representations describe the molecular bending vibrations of NiCl,?

2. According to the Beer-Lambert law absorbance is proportional to concentration at each wavelength. In principle, one could choose any wavelength for quantitative estimations of concentration. However, we generally select the wavelength of maximum absorbance for a given sample and use it in our absorbance measurements. Especially, one should avoid the steep portions of the spectrum. Why? 3. Which concentration range a dilute or a concentrated one - is chosen for accurate determinations of unknown concentrations?

III. Concisely describe how you would use IR to distinguish the two compounds. Give the difference in frequency, intensity/shape and corresponding vibration modes. A В

i want example of HNMR signals that out of expectation because of dimagnetic anisotropy or resonance