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IUPAC Nomenclature of Aldehydes01:16

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Aldehydes are named based on the systematic nomenclature rules set by the IUPAC. For acyclic aldehydes, the longest carbon chain containing the aldehydic (–CHO) group is considered the parent chain. The aldehyde is named by replacing the last letter “e” in the hydrocarbon name with “al”. For instance, a simple, seven-carbon-membered acyclic aldehyde is called heptanal, derived from heptane. The carbon chain is numbered starting from the aldehydic carbon, although...
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IUPAC names of carboxylic acids are systematically derived following a few rules discussed below.
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Naming Amides
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
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Preparation of Diols and Pinacol Rearrangement01:57

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Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
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1-[6-(1H-Indol-1-yl)pyridin-2-yl]-1H-indole-3-carbaldehyde.

C Ramathilagam1, P R Umarani2, N Venkatesan3

  • 1Department of Physics, AMET University, Kanathur, Chennai 603 112, India.

Acta Crystallographica. Section E, Structure Reports Online
|April 26, 2014
PubMed
Summary
This summary is machine-generated.

This study details the molecular structure of a novel compound, C22H15N3O. Researchers identified a specific dihedral angle between indole units and observed weak intermolecular interactions forming a 2D crystal network.

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Area of Science:

  • Crystallography
  • Organic Chemistry
  • Supramolecular Chemistry

Background:

  • Understanding the three-dimensional arrangement of atoms in organic molecules is crucial for predicting their properties.
  • Intermolecular interactions play a significant role in the self-assembly and stability of crystal structures.
  • Indole-containing compounds are prevalent in pharmaceuticals and materials science.

Purpose of the Study:

  • To elucidate the crystal structure of the title compound, C22H15N3O.
  • To analyze the dihedral angle between the indole units within the molecule.
  • To investigate the intermolecular and intramolecular interactions present in the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of the crystal structure included the identification of hydrogen bonding and other non-covalent interactions.
  • Geometric parameters, such as dihedral angles, were precisely measured.

Main Results:

  • The molecular formula of the title compound was confirmed as C22H15N3O.
  • A dihedral angle of 33.72(3)° was measured between the two indole units.
  • Weak intramolecular C-H⋯N interactions were observed within the molecule.
  • The crystal packing is characterized by weak C-H⋯O and C-H⋯π interactions, resulting in a two-dimensional network parallel to the bc plane.

Conclusions:

  • The crystal structure of C22H15N3O has been successfully determined.
  • The molecule exhibits a specific conformation dictated by the dihedral angle between its indole moieties.
  • The formation of a 2D supramolecular network is driven by a combination of weak C-H⋯N, C-H⋯O, and C-H⋯π interactions, highlighting the importance of non-classical hydrogen bonds in crystal engineering.