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Updated: Jun 1, 2026
06:46
Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
(2E,4E,6E)-3-Methyl-7-(pyren-1-yl)octa-2,4,6-trienoic acid
Summary
A novel pyrene derivative was synthesized using the Wittig reaction. Crystallization yielded the all-trans compound, revealing unique molecular arrangements and hydrogen bonding in its crystal structure.
Area of Science:
- Organic Chemistry
- Crystallography
- Materials Science
Background:
- Pyrene derivatives are known for their unique photophysical properties.
- Understanding molecular packing and intermolecular interactions is crucial for materials design.
Purpose of the Study:
- To synthesize a novel pyrene-containing compound.
- To characterize its crystal structure and intermolecular interactions.
Main Methods:
- Wittig reaction for synthesis.
- Saponification for functional group transformation.
- Crystallization for purification and single-crystal X-ray diffraction.
Main Results:
- Successful synthesis of C(25)H(20)O(2) in all-trans configuration.
- Crystal structure analysis revealed two independent molecules (A and B) with near-parallel arrangement.
- Significant dihedral angles between the triene chain and pyrene system (52.8° and 42.2°).
- Formation of centrosymmetric hydrogen-bonded dimers (AA and BB) via carboxyl groups, exhibiting the R(2)(2)(8) motif.
Conclusions:
- The study reports the synthesis and detailed crystal structure of a novel pyrene derivative.
- The non-planar geometry and specific intermolecular hydrogen bonding influence the solid-state packing.
- Findings contribute to the understanding of structure-property relationships in pyrene-based organic materials.
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The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.
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