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Related Concept Videos

Structure and Nomenclature of Alcohols and Phenols02:23

Structure and Nomenclature of Alcohols and Phenols

Overview
Alcohols are one of the most important functional groups in organic chemistry. The name of alcohol comes from the hydrocarbon from which it is derived. Alcohols are organic molecules containing the functional hydroxyl or –OH group directly bonded to carbon. Phenols have an OH group directly attached to a benzene ring. While alcohols are colorless, phenol is a white crystalline compound with a characteristic "hospital smell" odor.
As with other organic compounds, alcohols and phenols...
Structure and Nomenclature of Ethers02:28

Structure and Nomenclature of Ethers

Structure and Bonding
Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — identical or different — alkyl, aryl, or vinyl groups. The C–O–C linkage in dimethyl ether — the simplest ether — has an approximately tetrahedral bond angle of 110.3 degrees. The oxygen atom is sp3- hybridized, with the C–O distance being about 140 pm.
Classification of Ethers
Based on their attached substituent groups, ethers can be classified into two...
Acidity and Basicity of Alcohols and Phenols02:36

Acidity and Basicity of Alcohols and Phenols

Like water, alcohols are weak acids and bases. This is attributed to the polarization of the O–H bond making the hydrogen partially positive. Moreover, the electron pairs on the oxygen atom of alcohol make it both basic and nucleophilic. Protonation of an alcohol converts hydroxide, a poor leaving group, into water—a good one. The two acid–base equilibria corresponding to ethanol are depicted below.
Structure and Nomenclature of Epoxides02:38

Structure and Nomenclature of Epoxides

Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms present in their ring system. Cyclic ethers with a three-membered ring system are called “oxirane”, four-membered ring systems as “oxetane”, five-membered ring systems as “oxolane”, and six-membered ring systems as “oxane”. The cyclic structure of these rings imposes angle strain, and this strain is more in the ring having a smaller number of...
Formation of Halohydrin from Alkenes02:41

Formation of Halohydrin from Alkenes

An alkene, such as propene, reacts with bromine in the presence of water to yield a halohydrin. Halohydrins contain a halogen and a hydroxyl group attached to adjacent carbons. When the halogen is bromine, it is called a bromohydrin, while a chlorohydrin has chlorine as the halogen.
Preparation of Epoxides03:00

Preparation of Epoxides

Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...

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Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
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(E)-1-(3-Nitro-phen-yl)ethanone (2-methyl-phen-yl)hydrazone.

A Zeb1, S Yousuf

  • 1H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.

Acta Crystallographica. Section E, Structure Reports Online
|November 9, 2011
PubMed
Summary
This summary is machine-generated.

This study details the crystal structure of a Schiff base compound, C(15)H(15)N(3)O(2). The molecule features an E-configured azomethine bond and specific aromatic ring orientation, forming wave-like layers in the crystal lattice.

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Area of Science:

  • Crystallography
  • Organic Chemistry
  • Materials Science

Background:

  • Schiff base compounds are versatile organic molecules with diverse applications.
  • Understanding the solid-state structure is crucial for predicting material properties.

Purpose of the Study:

  • To elucidate the crystal structure of the Schiff base compound C(15)H(15)N(3)O(2).
  • To analyze the molecular conformation, including bond configurations and aromatic ring interactions.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of bond lengths, bond angles, and dihedral angles provided conformational insights.

Main Results:

  • The compound C(15)H(15)N(3)O(2) crystallizes with an E configuration at the azomethine double bond.
  • A dihedral angle of 13.4(12)° was observed between the two aromatic rings.
  • Molecules self-assemble into wave-like layers parallel to the (100) plane, lacking classical hydrogen bonding.

Conclusions:

  • The crystal packing and molecular geometry of this Schiff base are defined by specific intermolecular interactions and conformational preferences.
  • The observed layered structure may influence the compound's bulk properties and potential applications in materials science.