Naslov
Interaction induced absorption in infrared spectra of diphenyldiacetylene

Autori
Vojta, Danijela ; Baranović, Goran

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, pregledni

Izvornik
XIX. hrvatski skup kemičara i kemijskih inžinjera / - , 2005

Skup
XIX. hrvatski skup kemičara i kemijskih inžinjera

Mjesto i datum
Opatija, Hrvatska, 24.04.2005. - 27.04.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
induced absorption. diphenyldiacetylene; diphenylbutadiyne

Sažetak
It has been known for some time that in the IR spectra of melted or dissolved diphenyldiacetylene (DPDA) two bands, 2220 and 2152 cm-1, are found while the solid IR spectrum shows only one band at 2150 cm-1, as expected from the selection rules. The wavenumber of the extra IR band coincides with the value observed in solution Raman, 2219 cm-1. This was erroneously used as an argument for the changed molecular geometry in solution . If the acetylenic bridge remains linear the symmetry of either DPA or DPDA molecules depends on the dihedral angle j, D2h (j = 0), D2 (0 < j < pi/2), and D2d (j = pi/2). The correlation between these groups shows that the A1g (D2h) C&ordm ; C mode remains only Raman active for the latter two groups as well.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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