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Concerning the Structure of [18]Annulene

✍ Scribed by Otto Ermer

Publisher
John Wiley and Sons
Year
2005
Tongue
German
Weight
54 KB
Volume
88
Category
Article
ISSN
0018-019X

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✦ Synopsis

Dedicated to Professor Emanuel Vogel

A recent computational study of Schleyer and co-workers [1] is reviewed, which led these authors to the firm conclusion that [18]annulene has a localized structure with alternating single and double C,C bonds, contrary to earlier crystallographic analyses of X-ray-diffraction data favoring a delocalized non-alternating form. It is pointed out i) that deceptive orientational disorder phenomena in the crystal might be subject to experimental resolution in this case, and ii) that, in contrast to gas and solution phases, [18]annulene might possibly assume the non-alternating structure in the crystalline solid state.

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