Molecular structures of cyclotetradeca-1,3,8,10-tetrayne and cyclohexadeca-1,3,9,11-tetrayne

Authors
Gleiter, R Merger, R Chavez, J Oeser, T Irngartinger, H Pritzkow, H Nuber, B
Citation
R. Gleiter et al., Molecular structures of cyclotetradeca-1,3,8,10-tetrayne and cyclohexadeca-1,3,9,11-tetrayne, EUR J ORG C, (11), 1999, pp. 2841-2843
Citations number
13
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
ISSN journal
1434193X → ACNP
Issue
11
Year of publication
1999
Pages
2841 - 2843
Database
ISI
SICI code
1434-193X(199911):11<2841:MSOCAC>2.0.ZU;2-3
Abstract
Cyclotetradeca-1,3,8,10-tetrayne (3) and cyclohexadeca-1,3,9,11-tetrayne (4 ) have been prepared according to Sondheimer et al. The X-ray crystal struc tures of 3 and 4 reveal them to be in the chair conformation (3) and the tw isted chair-chair-conformation (4). The tetrayne units in both molecules de viate considerably from linearity, giving rise to transannular distances of the terminal sp centers of 3.098(2) Angstrom (3) and 4.147(2), 4.196(2) An gstrom (4), and 3.390(2) Angstrom (3) and 4.251(2), 4.252(2) Angstrom (4) f or the central sp atoms, respectively.