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Related Concept Videos

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...
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...
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...
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...
Nomenclature of Aromatic Compounds with Multiple Substituents01:11

Nomenclature of Aromatic Compounds with Multiple Substituents

When more than one substituent is present on the benzene ring, the IUPAC nomenclature depends on the number of substituents present.
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...
NMR Spectroscopy of Benzene Derivatives01:37

NMR Spectroscopy of Benzene Derivatives

Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling constants depend...

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3,4,5-Trimeth-oxy-4'-methyl-biphen-yl.

Manu Lahtinen1, Kalle Nättinen, Sami Nummelin

  • 1University of Jyväskylä, Department of Chemistry, PO Box 35, FI-40014 JY, Finland.

Acta Crystallographica. Section E, Structure Reports Online
|June 1, 2013
PubMed
Summary
This summary is machine-generated.

This study details the crystal structure of C16H18O3, revealing a 33.4° dihedral angle between benzene rings. Molecules exhibit a zigzag packing arrangement with intermolecular C-H⋯O and C-H⋯π interactions.

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Area of Science:

  • Crystallography
  • Organic Chemistry
  • Solid-State Chemistry

Background:

  • Understanding molecular packing and intermolecular forces is crucial in solid-state chemistry.
  • The specific arrangement of molecules in a crystal lattice influences material properties.

Purpose of the Study:

  • To elucidate the crystal structure of the title compound, C16H18O3.
  • To analyze the dihedral angle between benzene rings and identify intermolecular interactions.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of the crystal packing and identification of hydrogen bonds and C-H⋯π interactions were performed.

Main Results:

  • The dihedral angle between the benzene rings in C16H18O3 was determined to be 33.4(2)°.
  • Molecules are arranged in a zigzag pattern along the b-axis.
  • Weak C-H⋯O hydrogen bonds and C-H⋯π interactions involving methoxy groups and benzene rings were observed.

Conclusions:

  • The crystal structure of C16H18O3 is characterized by a specific dihedral angle and zigzag packing.
  • Intermolecular interactions, including hydrogen bonds and C-H⋯π interactions, play a significant role in stabilizing the crystal lattice.