Physical Chemistry , 1st ed.

E 8 C 3 3 C 2 6 S 4 6 d Nstationary 52 1 1 3  0° 120° 180° 90° 180° 1 2 cos  3 0 1 1 1 Nstationary(1 2 cos ) 15 0  1  1 ...

14.15 Nonallowed and Nonfundamental Vibrational Transitions Because molecules are not perfect harmonic oscillators, the strict s ...

isotopic substitution (for example, CD 3 CCH and CH 3 CCD for methyl- acetylene) is sometimes crucial in determining what norm ...

505 2 Wavenumber (cm Wavelength (mu) ^1 ) 16 4000 4000 650 700 800 900 1000 1500 2000 2500 3456789101112131415 M M M M M M MM M ...

a.Wa t e r, H 2 O b.Methane, CH 4 c.Acetylene, C 2 H 2 d.Ethane, CH 3 CH 3 e.Ethynol, CHCOH (that is, the alcohol made from ace ...

unhindered in their rotational and vibrational motions, and so both occur si- multaneously. In the liquid phase, vibrational mot ...

than do the (v 1,J 1) transitions. All of the J 1 transitions appear at higher energies than the pure vibrational tr ...

Rovibrational spectra for nonlinear polyatomic molecules are more com- plicated. For polyatomic molecules that have a permanent ...

study of the rotational-vibrational spectra of nonlinear polyatomic molecules is as rewarding as it is complex. Example 14.21 Th ...

or equal to about J4 or 5. (How does this compare with the spectrum in Figure 14.35?) c.Given that the band head occurs at arou ...

energy differencebetween the incoming light and the outgoing light. Thus, if the incoming light is in the visible part of the sp ...

Raman spectroscopy also has selection rules. The gross selection rule for a Raman-active vibration is related to the polarizabil ...

By comparing the solutions of Examples 14.19 and 14.22, we see that vi- brational absorption spectroscopy and Raman spectroscopy ...

14.2 & 14.3 Selection Rules and Electromagnetic Light 14.1.Why won’t a rotational spectrum be observed for the rotation of a ...

14.20.Lithium hydride,^7 Li^1 H, is a potential fuel for fusion re- actors because it is one of the few compounds of very small ...

14.46.In exercise 14.36 above, the vibrational frequency of FeH was given as 1661 cm^1. That is the observedvibrational frequen ...

14.68.Determine the number of Raman-active vibrations for the following molecules. You may have to determine their symmetry firs ...

15 519519 D ESPITE THE FACT THAT WE TREATED vibrational and rotational spectroscopy first, the astute student will recognize tha ...

Some molecules have electronic structures that are more easily described than others. The electron system of aromatic molecules ...

pretation that this light is emitted by electronic transitions was firmly estab- lished by Bohr, who derived the equation   1 ...