(Z)-tert-Butyl 2-(4-amino-9H-fluoren-9-ylidene)acetate
| Autor: | Vassilios Nastopoulos, Dionissios Papaioannou, Marios Krokidis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Acta Crystallographica Section E, Vol 64, Iss 10, Pp o1978-o1978 (2008) |
| Druh dokumentu: | article |
| ISSN: | 16005368 1600-5368 |
| DOI: | 10.1107/S1600536808029735 |
| Popis: | The title compound, C19H19NO2, obtained as an almost equimolar mixture (as shown by 1H NMR) with the E isomer through a Wittig reaction between 4-amino-9H-fluoren-9-one and the stabilized ylide Ph3P=CHCO2C(CH3)3, was obtained pure in the Z configuration following crystallization from toluene. The molecule shows a planar arrangement of the ring system and the new double bond, whereas the carbonyl O atom forms a 45.1 (3)° dihedral angle with it. The molecules are linked by N—H...O hydrogen bonds, forming cyclic structures with R44(24) graph-set motifs. These motifs are connected to each other, giving rise to a sheet structure parallel to the ab plane. The linkage within the sheets is further enhanced by π–π stacking interactions between the fluorene units [centroid–centroid distance = 3.583 (2) Å]. |
| Databáze: | Directory of Open Access Journals |
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