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π Molecular Orbitals of 1,3-Butadiene01:24

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Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
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3,3'-Oxybi[isobenzofuran-1(3H)-one].

Wenkuan Li1, Handong Yin, Liyuan Wen

  • 1College of Chemistry and Chemical Engineering, Liaocheng University, Shandong 252059, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary

This study details the crystal structure of a novel compound, C(16)H(10)O(5), revealing its unique molecular symmetry and intermolecular interactions. The research highlights the compound's potential for further structural and chemical investigation.

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Area of Science:

  • Organic Chemistry
  • Crystallography
  • Molecular Structure

Background:

  • Understanding the precise three-dimensional arrangement of atoms in organic molecules is crucial for predicting their properties and reactivity.
  • Isobenzofuranone derivatives are a class of compounds with diverse biological and chemical activities.
  • Detailed structural analysis provides fundamental insights into molecular behavior.

Purpose of the Study:

  • To elucidate the crystal structure of the title compound, C(16)H(10)O(5).
  • To characterize the molecular geometry, including dihedral angles and symmetry elements.
  • To investigate intermolecular interactions within the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of bond lengths, bond angles, and dihedral angles provided geometric details.
  • Identification of intermolecular interactions, such as hydrogen bonds and C-H···O contacts.

Main Results:

  • The compound C(16)H(10)O(5) features two isobenzofuran-1(3H)-one moieties linked by an oxygen atom.
  • Approximate non-crystallographic mirror symmetry was observed in the molecular structure.
  • A dihedral angle of 53.18(6) Å was measured between the isobenzofuranone ring systems.
  • Intermolecular C-H···O hydrogen bonds and other interactions were identified, forming zigzag chains in the crystal.

Conclusions:

  • The crystal structure of C(16)H(10)O(5) has been successfully determined.
  • The molecule exhibits interesting symmetry and packing features driven by intermolecular forces.
  • While chiral centers exist, their absolute configurations remain undetermined, suggesting potential for further stereochemical studies.