Halide Anions
Halide Anions - Related Videos
02:38
Anion Exchange Resin–Based Detection of Viruses from Bioaerosols
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2026
Source: Schaeffer, J. W., Chandler, et al. Detection of Viruses from Bioaerosols Using Anion Exchange Resin. J. Vis. Exp. (2018).This video demonstrates the detection of viruses from bioaerosols using an anion exchange resin. A liquid impinger containing the resin is used to capture viruses from the air. The resin is collected and treated with a virus lysis buffer containing carrier RNA. The lysate is transferred to a microcentrifuge tube for viral RNA isolation, followed by qRT-PCR to amplify...
02:45
Alkyl Halides
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2023
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...
01:12
Acid Halides to Esters: Alcoholysis
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2025
Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps: First, the alcohol acts as a nucleophile and attacks the acyl carbon to form a tetrahedral intermediate. Next, the carbonyl re-forms with the loss of a chloride ion. Lastly, the positively charged intermediate loses a proton to give an ester as the final product along with H3O+, making HCl an...
08:12
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Cited by 2 •
2017
Here, we present a protocol for the synthesis of CH3NH3I and CH3NH3Br precursors and the subsequent formation of pinhole-free, continuous CH3NH3PbI3-xBrx thin films for the application in high efficiency solar cells and other optoelectronic devices.
01:22
Mass Spectrometry: Alkyl Halide Fragmentation
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2025
Chlorine isotopes exist as 35Cl and 37Cl in a 3:1 ratio, while bromine isotopes exist as 79Br and 81Br in a 1:1 ratio. The mass spectrum of alkyl halides typically produces two distinct molecular ion peaks, the molecular ion peak, [M], and the molecular ion plus two, [M + 2] peak. The relative heights of these two peaks are proportional to the isotopic abundance ratios of the halide. For example, 2‐chloropropane and 1‐bromopropane display two peaks with relative peak heights in a 3:1 and 1:1...
FAQs
Down the halogen group, changes in ionic size and polarizability alter how readily the electron cloud responds to its surroundings. Solvation, meaning interaction with the surrounding solvent, also changes the effective behavior of each ion. Together, these factors influence bond strength, chemical reactivity, and the solubility of compounds containing halide anions.
Their negative charge allows halide anions to interact strongly with oppositely charged species, supporting formation of ionic compounds and, under suitable conditions, precipitates. They can also participate in redox chemistry, in which electrons are transferred between chemical species. These two behaviors make them useful for studying both compound formation and changes in oxidation state.
Halide anions are relevant to nucleophilic substitution, a reaction in which an electron-rich species replaces another group in a molecule. Differences in ionic size, polarizability, and solvation influence how the anions behave in this context. The same properties also affect bond strength, helping explain why related halide-containing compounds can show different reactivities.
A qualitative analysis examines how a sample responds to selected chemical conditions, especially whether a precipitate forms and how that material behaves in subsequent solubility comparisons. The observed pattern is then used to distinguish possible halide anions. This approach provides identification through visible chemical behavior rather than through measurement of a bulk quantity.
Halide salts and complexes provide practical systems for investigating ionic compound formation, precipitation behavior, solubility, and coordination-related chemistry. They also support laboratory identification and chemical synthesis. Because their properties vary with the halide involved, these compounds help researchers connect molecular composition with observable reactivity in inorganic and organic chemistry.
Their importance extends beyond basic inorganic analysis. In organic chemistry, they are connected with nucleophilic substitution and synthesis; in materials research, their salts and complexes provide chemically useful systems; and in biological studies, they offer relevant ionic components for investigation. These applications reflect how size, charge, reactivity, and solvation shape chemical behavior across fields.