In the crystal structure of the title compound, C 18 H 10 N 2 S 3 , the terminal thiophene rings are disordered. This disorder is of a flip-type and has been observed in some other thiophene derivatives. The molecule as a whole is approximately planar; the dihedral angle between the terminal five-me
✦ LIBER ✦
5-(Fluoren-9-ylidenemethyl)thiophene-2-carbaldehyde
✍ Scribed by Perašínová, Lucia ;Štefko, Martin ;Végh, Daniel ;Kožíšek, Jozef
- Publisher
- International Union of Crystallography
- Year
- 2006
- Tongue
- English
- Weight
- 203 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1600-5368
No coin nor oath required. For personal study only.
✦ Synopsis
The title compound, C 19 H 12 OS, can be synthesized in good yield (60%) utilizing Vilsmeyer-Haack formylation of 2-(9Hfluoren-9-ylidenemethyl)thiophene. The thiophene ring contains one short C-S bond [1.618 (2) A ˚].
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The bond lengths and angles in the title compound, C 40 H 24 N 4 O 2 S, are normal. The dihedral angles between the dibenzothiophene-S,S-dioxide and two quinoxaline groups are 34.88 (1) and 45.86 (1) .