Related Experiment Video
Updated: May 20, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
2,2'-Diisopropoxy-5,5'-methyl-enedi-benz-alde-hyde
This study details the molecular structure of C(21)H(24)O(4), revealing molecules positioned on a twofold rotation axis. The aldehyde group exhibits coplanarity with the benzene ring, offering insights into its chemical conformation.
Area of Science:
- Organic Chemistry
- Crystallography
Background:
- Understanding the three-dimensional structure of organic molecules is crucial for predicting their chemical behavior and potential applications.
- The specific compound C(21)H(24)O(4) has not been previously characterized in detail regarding its solid-state structure.
Purpose of the Study:
- To elucidate the crystal structure of the title compound C(21)H(24)O(4).
- To analyze the molecular geometry, including the positioning of atoms and functional groups within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- The resulting diffraction data was analyzed to obtain precise atomic coordinates and bond parameters.
Main Results:
- Molecules of C(21)H(24)O(4) were found to reside on a twofold rotation axis.
- The central methylene carbon atom lies on this axis of symmetry.
- The aldehyde group was observed to be coplanar with the attached benzene ring, with a C-C-C-O torsion angle of 175.7(4)°.
Conclusions:
- The determined crystal structure provides a definitive geometric description of C(21)H(24)O(4).
- The observed molecular symmetry and planarity of the aldehyde group offer insights into the electronic properties and reactivity of the compound.
Related Concept Videos
IUPAC Nomenclature of Aldehydes
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
Structure of Conjugated Dienes
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

