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Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism01:18

Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism

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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4-Methyl-benzene-carbothio-amide.

Saqib Ali, Shahid Hameed, Ahmad Luqman

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

    This study reveals the molecular structure of C(8)H(9)NS, detailing a slight twist between the carbothioamide group and the benzene ring. Intermolecular hydrogen bonds stabilize the crystal structure, forming specific ring motifs and chains.

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    Area of Science:

    • Crystallography
    • Organic Chemistry
    • Molecular Structure

    Background:

    • Understanding the precise three-dimensional arrangement of atoms in organic molecules is crucial for predicting their properties and reactivity.
    • Carbothioamide compounds are of interest due to their diverse applications in medicinal chemistry and materials science.

    Purpose of the Study:

    • To elucidate the detailed crystal structure of the molecule C(8)H(9)NS.
    • To analyze the geometric parameters, including dihedral angles and intermolecular interactions.

    Main Methods:

    • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
    • Analysis of hydrogen bonding networks and their topological representation.

    Main Results:

    • The carbothioamide group exhibits a dihedral angle of 17.03° relative to the benzene ring.
    • Intermolecular N-H⋯S hydrogen bonds were identified as the primary stabilizing force.
    • These interactions lead to the formation of eight-membered rings (R(2)(2)(8) and R(4)(2)(8) motifs) and chains along the b axis.

    Conclusions:

    • The crystal packing of C(8)H(9)NS is dictated by specific hydrogen bonding patterns.
    • The observed structural features provide insights into the solid-state behavior of this carbothioamide derivative.