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Molecular Structures of Cyclotetradeca-1,3,8,10-tetrayne and Cyclohexadeca-1,3,9,11-tetrayne (1999)

Gleiter, Rolf ; Merger, Roland ; Chavez, Jorge ; [et al.]

Weinheim : Wiley-Blackwell

Liebigs Annalen 1999 (1999), S. 2841-2843

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ISSN: 1434-193X

Keywords: Medium-sized rings ; Alkynes ; Structure elucidation ; X-ray diffraction ; Cyclic compounds ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: 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 structures of 3 and 4 reveal them to be in the chair conformation (3) and the twisted chair-chair-conformation (4). The tetrayne units in both molecules deviate considerably from linearity, giving rise to transannular distances of the terminal sp centers of 3.098(2) Å (3) and 4.147(2), 4.196(2) Å (4), and 3.390(2) Å (3) and 4.251(2), 4.252(2) Å (4) for the central sp atoms, respectively.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

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