A Tetraethynyl[5]cumulene. Issue 3 (18th February 2019)

• Record Type: Journal Article
• Authors: Marshall, Jonathan L.; Arslan, Funda; Januszewski, Johanna A.; Ferguson, Michael J.; Tykwinski, Rik R.
• Is Part Of: Helvetica chimica acta. Volume 102:Issue 3(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-02-18
• Subjects: alkynes -- carbomers -- cumulenes -- graphyne -- synthetic carbon allotropes; Chemistry -- Periodicals; Chemistry, Analytical -- periodicals; Chimie -- Périodiques; 540
• DOI: 10.1002/hlca.201900001
• Languages: English
• ISSNs: 0018-019X

Abstract

Abstract: The first example of a new class of carbon‐rich molecules is introduced, namely, a derivative of tetraethynyl[5]cumulene (TE5C). The use of sterically demanding pendent groups is the decisive structural feature to provide a stable product. Whereas triisopropylsilyl groups are seemingly not sufficiently large to afford an isolable cumulene product, switching to the larger tris(3, 5‐di‐ tert ‐butylphenyl)methyl ('supertrityl') groups gives a crystalline, stable compound ([5]TE ). The structural and electronic properties of[5]TE are examined in comparison to its closest known molecular relatives, tetraaryl[5]cumulenes. Abstract :