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A Tetraethynyl[5]cumulene
Author(s) -
Marshall Jonathan L.,
Arslan Funda,
Januszewski Johanna A.,
Ferguson Michael J.,
Tykwinski Rik R.
Publication year - 2019
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201900001
Subject(s) - cumulene , chemistry , steric effects , derivative (finance) , molecule , product (mathematics) , stereochemistry , computational chemistry , organic chemistry , geometry , mathematics , financial economics , economics
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.