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Related Concept Videos

UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the contributions...
IUPAC Nomenclature of Aldehydes01:16

IUPAC Nomenclature of Aldehydes

Aldehydes are named based on the systematic nomenclature rules set by the IUPAC. For acyclic aldehydes, the longest carbon chain containing the aldehydic (–CHO) group is considered the parent chain. The aldehyde is named by replacing the last letter “e” in the hydrocarbon name with “al”. For instance, a simple, seven-carbon-membered acyclic aldehyde is called heptanal, derived from heptane. The carbon chain is numbered starting from the aldehydic carbon, although the aldehydic carbon’s locant...
Structure and Nomenclature of Alcohols and Phenols02:23

Structure and Nomenclature of Alcohols and Phenols

Overview
Alcohols are one of the most important functional groups in organic chemistry. The name of alcohol comes from the hydrocarbon from which it is derived. Alcohols are organic molecules containing the functional hydroxyl or –OH group directly bonded to carbon. Phenols have an OH group directly attached to a benzene ring. While alcohols are colorless, phenol is a white crystalline compound with a characteristic "hospital smell" odor.
As with other organic compounds, alcohols and phenols...
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles01:11

Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles

Naming Amides
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

Five-Membered Heterocyclic Aromatic Compounds: Overview

Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom, respectively.

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Related Experiment Video

Updated: May 20, 2026

Synthesis of Esters Via a Greener Steglich Esterification in Acetonitrile
06:52

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Published on: October 30, 2018

2-Formyl-6-meth-oxy-phenyl cinnamate.

N Manikandan, S Murugavel, D Kannan

    Acta Crystallographica. Section E, Structure Reports Online
    |July 17, 2012
    PubMed
    Summary

    This study details the crystal structure of a C(17)H(14)O(4) compound, revealing an E-configured C=C bond and specific dihedral angles. Molecular interactions like hydrogen bonds and pi-stacking influence its crystal packing.

    Area of Science:

    • Crystallography
    • Organic Chemistry
    • Materials Science

    Background:

    • Understanding molecular structure and interactions is crucial for predicting material properties.
    • Crystal packing significantly influences the physical and chemical behavior of organic compounds.

    Purpose of the Study:

    • To elucidate the crystal structure and intermolecular interactions of the title compound, C(17)H(14)O(4).
    • To analyze the conformational preferences and packing motifs within the crystal lattice.

    Main Methods:

    • Single-crystal X-ray diffraction analysis was employed to determine the molecular and crystal structure.
    • Analysis of bond lengths, bond angles, dihedral angles, and intermolecular interactions (hydrogen bonds, pi-stacking).

    Main Results:

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    Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
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    Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate

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    A Two-Step Protocol for Umpolung Functionalization of Ketones Via Enolonium Species

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    • The compound exhibits an E conformation around the C=C bond.
    • A dihedral angle of 73.9° was measured between the two benzene rings.
    • Crystal packing is characterized by C-H⋯O hydrogen bonds forming C(4) chains along the b-axis.
    • Weak aromatic π-π stacking interactions with a centroid-centroid distance of 3.703 Å were observed.

    Conclusions:

    • The crystal structure of C(17)H(14)O(4) is defined by specific conformational and packing arrangements.
    • Intermolecular hydrogen bonding and π-π stacking play key roles in stabilizing the crystal lattice.
    • These findings contribute to the understanding of structure-property relationships in organic crystalline materials.