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Molecular Structures of Cyclotetradeca-1,3,8,10-tetrayne and Cyclohexadeca-1,3,9,11-tetrayne

✍ Scribed by Rolf Gleiter; Roland Merger; Jorge Chavez; Thomas Oeser; Hermann Irngartinger; Hans Pritzkow; Bernhard Nuber

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 223 KB
Volume: 1999
Category: Article
ISSN: 1434-193X
DOI: 10.1002/(sici)1099-0690(199911)1999:11<2841::aid-ejoc2841>3.0.co;2-e

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✦ Synopsis

Cyclotetradeca-1,3,8,10-tetrayne (3) and cyclohexadeca-both molecules deviate considerably from linearity, giving rise to transannular distances of the terminal sp centers of 1,3,9,11-tetrayne (4) have been prepared according to Sondheimer et al. The X-ray crystal structures of 3 and 4 3.098(2) A ˚(3) and 4.147(2), 4.196(2) A ˚(4), and 3.390(2) A ˚(3) and 4.251(2), 4.252(2) A ˚(4) for the central sp atoms, reveal them to be in the chair conformation (3) and the twisted chair-chair-conformation (4). The tetrayne units in respectively.

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