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Related Concept Videos

Structure and Nomenclature of Ethers02:28

Structure and Nomenclature of Ethers

14.1K
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...
14.1K
Structure and Nomenclature of Epoxides02:38

Structure and Nomenclature of Epoxides

7.7K
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...
7.7K
Structure of Benzene: Molecular Orbital Model01:18

Structure of Benzene: Molecular Orbital Model

11.6K
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
11.6K
Basicity of Heterocyclic Aromatic Amines01:25

Basicity of Heterocyclic Aromatic Amines

6.8K
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).
6.8K
Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

3.2K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
3.2K
Nomenclature of Aromatic Compounds with Multiple Substituents01:11

Nomenclature of Aromatic Compounds with Multiple Substituents

9.9K
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...
9.9K

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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)-3-(1,3-Benzodioxol-5-yl)-1-{4-[bis-(4-meth-oxy-phen-yl)meth-yl]piperazin-1-yl}prop-2-en-1-one.

Yan Zhong, Bin Wu

    Acta Crystallographica. Section E, Structure Reports Online
    |March 14, 2012
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    Summary

    This study details the crystal structure of a compound with two independent molecules, C(29)H(30)N(2)O(5). Molecular conformations and intermolecular C-H⋯O interactions were analyzed.

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    Area of Science:

    • Crystallography
    • Organic Chemistry
    • Solid-State Chemistry

    Background:

    • The asymmetric unit of the title compound, C(29)H(30)N(2)O(5), contains two unique molecules.
    • Understanding molecular arrangement and interactions is crucial in solid-state chemistry.

    Purpose of the Study:

    • To elucidate the crystal structure of the title compound.
    • To analyze the conformation and intermolecular interactions within the crystal lattice.

    Main Methods:

    • Single-crystal X-ray diffraction was employed to determine the crystal structure.
    • Analysis of bond lengths, bond angles, dihedral angles, and intermolecular interactions (C-H⋯O).

    Main Results:

    • Two crystallographically independent molecules were identified in the asymmetric unit.
    • Both molecules exhibit an E conformation around the central C=C double bond.
    • The dihedral angles between the methoxy-benzene rings are approximately 71.4° and 68.6°.
    • Intermolecular hydrogen bonding, specifically C-H⋯O interactions, links the molecules in the crystal.

    Conclusions:

    • The crystal structure of C(29)H(30)N(2)O(5) has been successfully determined.
    • The study provides insights into the conformational preferences and intermolecular packing of this organic compound.
    • The identified C-H⋯O interactions play a role in stabilizing the crystal structure.