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Related Concept Videos

Alkyl Halides02:45

Alkyl Halides

Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
Preparation of Acid Anhydrides01:07

Preparation of Acid Anhydrides

One of the methods for preparing symmetrical or unsymmetrical acid anhydrides involves the treatment of acid chlorides with the sodium salt of carboxylic acids. The reaction proceeds via a nucleophilic acyl substitution.
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
Enolate Mechanism Conventions01:15

Enolate Mechanism Conventions

When a carbonyl compound is treated with a strong base, the α position gets deprotonated to give a resonance-stabilized intermediate called an enolate. Enolates are ambident nucleophiles because they possess two nucleophilic sites that can attack an electrophile owing to the delocalization of the negative charge between the α carbon and oxygen atoms. When the oxygen atom attacks an electrophile, it is called O-attack, whereas electrophilic attack via the α carbon is known as C-attack.
C-attack...
Determining the pH of Salt Solutions04:08

Determining the pH of Salt Solutions

The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
Regioselectivity of Electrophilic Additions-Peroxide Effect02:35

Regioselectivity of Electrophilic Additions-Peroxide Effect

In the presence of organic peroxides, the addition of hydrogen bromide to an alkene yields the isomer that is not predicted by Markovnikov’s rule. For example, the addition of hydrogen bromide to 2-methylpropene in the presence of peroxides gives 1-bromo-2-methylpropane. This addition reaction proceeds via a free radical mechanism, which reverses the regioselectivity. The free radical reaction mechanism involves three stages: initiation, propagation, and termination.
Halogenation of Alkenes02:46

Halogenation of Alkenes

Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.

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Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives
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4-Ethoxy-anilinium perchlorate.

Xue-Qun Fu1

  • 1Ordered Matter Science Research Center, Southeast University, Nanjing 210096, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

This study identifies strong hydrogen bonds in a specific ammonium perchlorate compound. These interactions are crucial for understanding the crystal structure and chemical properties of related materials.

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Area of Science:

  • Crystallography
  • Inorganic Chemistry
  • Materials Science

Background:

  • Hydrogen bonds play a critical role in determining the structural and physical properties of crystalline solids.
  • Ammonium perchlorate compounds are widely used in various industrial applications, including propellants and energetic materials.

Purpose of the Study:

  • To investigate the presence and strength of hydrogen bonds in the title compound, C(8)H(12)NO(+)·ClO(4) (-).
  • To elucidate the structural implications of these hydrogen bonds on the overall crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction analysis was employed to determine the precise atomic arrangement.
  • Intermolecular interactions, specifically hydrogen bonding, were analyzed using crystallographic data.

Main Results:

  • The study confirmed the existence of strong hydrogen bonds between the ammonium groups (NH4+) and the perchlorate anions (ClO4-).
  • These hydrogen bonds significantly influence the packing and stability of the crystal structure.

Conclusions:

  • The identified strong hydrogen bonds are a key feature of the title compound's crystal structure.
  • Understanding these interactions provides insights into the behavior and potential applications of ammonium perchlorate-based materials.