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Related Concept Videos

Basicity of Heterocyclic Aromatic Amines01:25

Basicity of Heterocyclic Aromatic Amines

Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
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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[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
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2,3,6-Trichloro-5-(trichloro-meth-yl)pyridine.

Xue-Mei Zhu, Li-Jun Pei, Zhao-Sheng Cai

    Acta Crystallographica. Section E, Structure Reports Online
    |September 13, 2012
    PubMed
    Summary

    This study details the crystal structure of a unique C(6)HCl(6)N compound, revealing its molecular symmetry and weak internal C-H⋯Cl bonds. These findings contribute to understanding halogenated organic compounds.

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    Published on: July 17, 2020

    Area of Science:

    • Crystallography
    • Organic Chemistry
    • Solid-State Chemistry

    Background:

    • Hexachlorinated compounds represent a significant class of organohalogens with diverse applications and environmental relevance.
    • Understanding the solid-state structure of such molecules is crucial for predicting their physical properties and reactivity.
    • The specific compound C(6)HCl(6)N presents an interesting case due to its potential symmetry and intermolecular interactions.

    Purpose of the Study:

    • To elucidate the crystal structure of the title compound, C(6)HCl(6)N.
    • To identify the molecular symmetry and packing in the solid state.
    • To investigate the presence and nature of any significant intermolecular or intramolecular interactions.

    Main Methods:

    • Single-crystal X-ray diffraction was employed to determine the atomic arrangement.
    • The crystal structure was solved and refined using standard crystallographic software.
    • Analysis of bond lengths, bond angles, and intermolecular contacts was performed.

    Main Results:

    • The title compound, C(6)HCl(6)N, crystallizes with the molecule located on a mirror plane.
    • The asymmetric unit contains half of the molecule, indicating molecular symmetry.
    • Weak intramolecular carbon-hydrogen⋯chlorine (C-H⋯Cl) contacts were identified.

    Conclusions:

    • The crystal structure confirms the high symmetry of the C(6)HCl(6)N molecule in the solid state.
    • The observed weak C-H⋯Cl interactions may influence crystal packing and intermolecular forces.
    • This structural information provides a foundation for further studies on the physical and chemical properties of this halogenated nitrogen compound.