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Updated: Feb 16, 2026

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
Published on: May 26, 2019
Isopropyl-triphenyl-phospho-nium bromide monohydrate
Hai Wang1, Xi-Man Zhang, Ping Li
1School of Chemistry and Chemical Engineering, TaiShan Medical University, Tai'an 271016, People's Republic of China.
This study details the crystal structure of a water-solvated salt, C(21)H(22)P(+)·Br(-)·H(2)O. It highlights hydrogen bonding interactions between ionic components, water molecules, and bromide anions.
Area of Science:
- Crystal chemistry
- Supramolecular chemistry
- Solid-state chemistry
Background:
- Understanding the role of water in ionic salt structures is crucial.
- Investigating intermolecular interactions provides insights into material properties.
Purpose of the Study:
- To elucidate the crystal structure of the water-solvated salt C(21)H(22)P(+)·Br(-)·H(2)O.
- To analyze the hydrogen bonding network within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Analysis of intermolecular contacts, including hydrogen bonds (C-H⋯Br, O-H⋯O, O-H⋯Br), was performed.
Main Results:
- The crystal structure reveals the arrangement of the ionic components (C(21)H(22)P(+) and Br(-)) and water molecules.
- Short C-H⋯Br contacts link the ionic species along the a-axis.
- Half-occupied water molecules form strong O-H⋯O hydrogen bonds and interact with bromide anions via O-H⋯Br contacts.
Conclusions:
- The crystal structure of C(21)H(22)P(+)·Br(-)·H(2)O is characterized by a specific hydrogen bonding network.
- Water molecules play a significant role in stabilizing the crystal lattice through interactions with both cations and anions.
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Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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