Astrochimistry – Spring 2013 Interstellar PAHs

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Electron delocalization (=resonance) and aromaticity II. General properties of “chemical” <strong>PAHs</strong> II.2 Electronic properties Molecular orbitals = combination of atomic orbitals original p-atomic orbitals Resulting molecular (delocalized) orbital Electrostatic potential map of benzene Images from Paula Yurkanis Bruice, Cleveland, OH - http://wps.prenhall.com/wps/media/objects/724/741576/chapter_07.html 12
Electron delocalization (=resonance) and aromaticity II. General properties of “chemical” <strong>PAHs</strong> II.2 Electronic properties • Bonding MO: constructive (in-phase) overlap • Antibonding MO: destructive (out-of-phase) overlap 13
Page 1 and 2: Astrochimistry - Spring 2013 Lectur
Page 3 and 4: I. From Unidentified to Aromatic In
Page 9 and 10: Related detections I. From Unidenti
Page 11: II. General properties of “chemic
Page 15 and 16: II. General properties of “chemic
Page 21 and 22: In HII regions and reflection nebul
Page 23 and 24: III. Evolution of interstellar PAHs
Page 37 and 38: IV. Influence of PAHs on the ISM ev
Page 39 and 40: IV. Influence of PAHs on the ISM ev
Page 41: VI. Some bibliographic references

Astrochimistry – Spring 2013 Interstellar PAHs

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