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Related Concept Videos

Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous overlap of p...
Aromatic Hydrocarbon Cations: Structural Overview01:18

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Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
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The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
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Published on: November 21, 2013

Novel foldamer structural architecture from cofacial aromatic building blocks.

Panchami Prabhakaran1, Vedavati G Puranik, Jima N Chandran

  • 1Division of Organic Chemistry, National Chemical Laboratory, Dr Homi Bhabha Road, 411 008 Pune, India.

Chemical Communications (Cambridge, England)
|June 9, 2009
PubMed
Summary

Peri-substituted 1,8-diphenylnaphthalene serves as a versatile building block for creating new synthetic oligomers. These novel structures exhibit controlled conformations and cofacial arrangements, advancing materials science.

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Area of Science:

  • Organic Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Developing conformationally ordered synthetic oligomers is crucial for advanced materials.
  • Achieving cofacial arrangements in oligomers presents synthetic challenges.

Purpose of the Study:

  • To demonstrate the utility of peri-substituted 1,8-diphenylnaphthalene.
  • To construct novel synthetic oligomers with controlled conformations and cofacial features.

Main Methods:

  • Utilizing peri-substituted 1,8-diphenylnaphthalene as a key building block.
  • Employing synthetic organic chemistry techniques for oligomer construction.

Main Results:

  • Successfully synthesized novel conformationally ordered synthetic oligomers.
  • Demonstrated the cofacial structural features of the resulting oligomers.
  • Established the effectiveness of the diphenylnaphthalene building block.

Conclusions:

  • Peri-substituted 1,8-diphenylnaphthalene is a valuable synthon for ordered oligomer synthesis.
  • The developed method allows for the construction of unique cofacial supramolecular architectures.