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Birch reduction uses solvated electrons as reducing agents. The reaction converts benzene to 1,4-cyclohexadiene. The reaction proceeds by the transfer of a single electron to the ring to form a benzene radical anion. This anion is highly basic—it abstracts a proton from the alcohol to form a cyclohexadienyl radical. Another single electron transfer gives the cyclohexadienyl anion. A proton transfer from the alcohol forms 1,4-cyclohexadiene. Since this reduction occurs via radical anion...
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Nomenclature of Aromatic Compounds with Multiple Substituents01:11

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1,4-Bis(iodo-meth-yl)benzene.

C John McAdam1, Lyall R Hanton, Stephen C Moratti

  • 1Department of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a centrosymmetric compound, C(8)H(8)I(2), using metathesis. Crystal structure analysis revealed molecular stacks stabilized by C-H⋯I interactions and short iodine-iodine contacts, forming undulating sheets.

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Area of Science:

  • Solid-state chemistry
  • Crystallography
  • Organic synthesis

Background:

  • The synthesis of novel organic compounds with specific structural motifs is crucial for materials science.
  • Understanding intermolecular interactions is key to predicting and controlling crystal packing.
  • Halogen bonding plays a significant role in crystal engineering.

Purpose of the Study:

  • To synthesize and characterize the centrosymmetric compound C(8)H(8)I(2).
  • To elucidate the crystal structure and identify key intermolecular interactions.
  • To investigate the role of halogen bonding and other weak interactions in stabilizing the crystal lattice.

Main Methods:

  • Metathesis reaction using a dibromo analogue as a precursor.
  • Single-crystal X-ray diffraction for structural determination.
  • Analysis of intermolecular interactions, including C-H⋯I bonds and I⋯I contacts.

Main Results:

  • Successful synthesis of the title compound C(8)H(8)I(2).
  • Crystal structure reveals a centrosymmetric arrangement of molecules.
  • Molecules are organized into stacks along the b axis via weak C-H⋯I interactions.
  • Short I⋯I contacts [3.8433(2) Å] stabilize the structure by forming undulating sheets in the (101) plane.

Conclusions:

  • The crystal structure of C(8)H(8)I(2) is characterized by a unique packing motif.
  • Both C-H⋯I interactions and I⋯I contacts are important for the overall crystal stability.
  • This study provides insights into halogen bonding and weak interactions in organic crystal engineering.