Ethynylated Acene Synthesis and Photophysics for an Organic Chemistry Laboratory Course
In: Journal of Chemical Education, Jg. 98 (2021-05-01), Heft 5, S. 1741-1749
Online
academicJournal
Zugriff:
An operationally simple, reliable synthesis of ethynylated acenes suitable for an upper-division undergraduate organic chemistry laboratory course has been developed. This experiment requires students to synthesize two acene derivatives and can be completed in 6-8 laboratory sessions (3 h each); a shorter experiment could be realized in the synthesis of only one product. Synthesis is carried out by first treating a terminal alkyne with n-butyllithium in an oven-dried flask under nitrogen at 0°C. An acene quinone is added, which produces a doubly ethynylated diol. Dehydration with SnCl[subscript 2]/HCl yields a bis(ethynylated) acene, which is purified via a short pad or column of silica gel. The intense colors of the products allow for great ease in determining reaction completion and following the products in chromatography. UV-vis and fluorescence spectroscopy may be used to better understand the effect of molecular structure on electronic properties.
Titel: |
Ethynylated Acene Synthesis and Photophysics for an Organic Chemistry Laboratory Course
|
---|---|
Autor/in / Beteiligte Person: | Petty, Anthony J., II ; Odom, Susan A. |
Link: | |
Zeitschrift: | Journal of Chemical Education, Jg. 98 (2021-05-01), Heft 5, S. 1741-1749 |
Veröffentlichung: | 2021 |
Medientyp: | academicJournal |
ISSN: | 0021-9584 (print) |
DOI: | 10.1021/acs.jchemed.0c01360 |
Schlagwort: |
|
Sonstiges: |
|