Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Spectra under high energy collision

The appearance of the IR spectrum of a compound depends somewhat on the sample s phase. Under high resolution, gas-phase IR bands consist of closely spaced lines—the rotational fine structure however, IR bands of liquids and solids very rarely show rotational fine structure. In most solids, the molecules are held in fixed lattice positions and are not free to rotate. In liquids, the high rate of intermolecular collisions and the substantial intermolecular interactions cause random shifts in the rotational energies, thereby broadening the rotational lines of a band sufficiently to merge them into one another, and eliminate the rotational fine structure. (Broadening of fine structure lines is also observed in gas-phase spectra when the pressure is increased.)... [Pg.386]

See other pages where Spectra under high energy collision is mentioned: [Pg.227]    [Pg.426]    [Pg.246]    [Pg.48]    [Pg.426]    [Pg.187]    [Pg.425]    [Pg.475]    [Pg.352]    [Pg.489]    [Pg.299]    [Pg.146]    [Pg.483]    [Pg.168]    [Pg.1206]    [Pg.56]    [Pg.104]    [Pg.132]    [Pg.139]    [Pg.636]    [Pg.32]    [Pg.1032]    [Pg.175]    [Pg.1032]    [Pg.72]    [Pg.119]    [Pg.73]    [Pg.282]    [Pg.418]    [Pg.292]    [Pg.396]    [Pg.1490]    [Pg.28]   


SEARCH



Collision energy

High energy collisions

High-energy

© 2024 chempedia.info