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Structure and Nomenclature of Epoxides

Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms present in their ring system. Cyclic ethers with a three-membered ring system are called “oxirane”, four-membered ring systems as “oxetane”, five-membered ring systems as “oxolane”, and six-membered ring systems as “oxane”. The cyclic structure of these rings imposes angle strain, and this strain is more in the ring having a smaller number of...
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Overview
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Liang-Zhong Xu1, Shan-Qi Sun, Wei Guo

  • 1College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
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PubMed
Summary

This study details the molecular structure of a dichlorinated organic compound, C(19)H(22)Cl(2)O(3). The research reveals specific conformational details and intermolecular interactions within its crystal lattice.

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Area of Science:

  • Organic Chemistry
  • Crystallography
  • Molecular Structure

Background:

  • Understanding the three-dimensional arrangement of atoms in organic molecules is crucial for predicting their properties and reactivity.
  • Crystal structure analysis provides precise details about molecular conformation and intermolecular forces.

Purpose of the Study:

  • To elucidate the specific molecular conformation and crystal packing of the title compound, C(19)H(22)Cl(2)O(3).
  • To characterize the dihedral angles between key ring systems and identify stabilizing intermolecular interactions.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the atomic arrangement.
  • Analysis of bond lengths, bond angles, and dihedral angles provided conformational information.
  • Identification of intermolecular interactions, such as hydrogen bonds, was performed.

Main Results:

  • The cyclo-hexane ring within C(19)H(22)Cl(2)O(3) adopts a chair conformation.
  • Specific dihedral angles were quantified: 81.88° between the furan and benzene rings, and 50.19° between the furan ring and the butyl group's carbon plane.
  • Weak intermolecular C-H⋯O hydrogen bonds were identified as the primary stabilizing forces in the crystal structure.

Conclusions:

  • The study provides a detailed structural characterization of C(19)H(22)Cl(2)O(3).
  • The observed chair conformation and specific dihedral angles offer insights into the molecule's spatial arrangement.
  • Intermolecular hydrogen bonding plays a significant role in the crystal lattice stability.