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Related Concept Videos

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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...
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The disproportionation reaction of a metastable Sn(I) chloride solution, obtained via the preparative co-condensation technique, is used for the synthesis of a metalloid tin cluster...
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Alkyl Halides02:45

Alkyl Halides

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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...
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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:
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Acid Halides to Carboxylic Acids: Hydrolysis01:01

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Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
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Mass Spectrometry: Alkyl Halide Fragmentation01:22

Mass Spectrometry: Alkyl Halide Fragmentation

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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...
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Related Experiment Video

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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Solution Behavior of Beryllium Halides in Dimethylformamide.

Matthias Müller1, Magnus R Buchner1

  • 1Fachbereich Chemie , Philipps-Universität Marburg , Marburg 35037 , Germany.

Inorganic Chemistry
|September 10, 2019
PubMed
Summary

This study explores beryllium halide reactions in N,N-dimethylformamide (DMF), revealing unique coordination chemistry. Beryllium bromide (BeBr2) emerges as the optimal precursor for synthesizing novel beryllium coordination compounds.

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Area of Science:

  • Inorganic Chemistry
  • Coordination Chemistry
  • Materials Science

Background:

  • The reactivity of beryllium compounds in N,N-dimethylformamide (DMF) is largely unexplored.
  • DMF, a versatile O-donor solvent, offers unique reaction conditions for beryllium chemistry.

Purpose of the Study:

  • To comprehensively study the interactions between beryllium halides (BeX2, X = F, Cl, Br, I) and DMF.
  • To characterize the resulting beryllium-DMF species and understand halide competitiveness.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy
  • Infrared (IR) spectroscopy
  • Single-crystal X-ray diffraction
  • Titration experiments

Main Results:

  • Characterization of Be(DMF)1-4X2 species, detailing halide competitiveness against DMF.
  • Identification of [BeCl(DMF)3]+ as the dominant species in BeCl2/DMF solutions.
  • Observation of high beryllium-chloride bond strength and instability of beryllium iodide compounds.
  • Characterization of the novel hexaiodidodiberyllate anion ([Be2I6]2-).

Conclusions:

  • Beryllium bromide (BeBr2) is the preferred starting material for synthesizing beryllium coordination compounds.
  • The study elucidates the distinct coordination chemistry of beryllium halides in DMF.
  • Results highlight the influence of halide type on beryllium complex stability and reactivity.