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Updated: Jun 5, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
2,5-Dibromo-terephthalic acid dihydrate.
Guang-Liang Song1, Shan Liu, Hua-Jun Liu
1Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
This study details the crystal structure of 2,5-dibromo-terephthalic acid dihydrate. Intermolecular hydrogen bonds create a robust three-dimensional framework in the solid state.
Area of Science:
- Crystallography
- Materials Science
- Organic Chemistry
Background:
- 2,5-dibromo-terephthalic acid (DBTA) is an organic compound with potential applications in materials science.
- Understanding the crystal structure of DBTA is crucial for predicting and controlling its properties.
Purpose of the Study:
- To determine the crystal structure of 2,5-dibromo-terephthalic acid dihydrate (C(8)H(4)Br(2)O(4)·2H(2)O).
- To analyze the intermolecular interactions and packing in the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was used to elucidate the molecular and crystal structure.
- Analysis of the asymmetric unit composition and symmetry elements.
Main Results:
- The asymmetric unit contains one half-molecule of DBTA and one water molecule.
- The DBTA molecule exhibits centrosymmetry.
- Intermolecular O-H⋯O hydrogen bonds were identified as the primary driving force for crystal packing.
- A three-dimensional framework structure is formed through these hydrogen bonds.
Conclusions:
- The crystal structure of 2,5-dibromo-terephthalic acid dihydrate has been successfully determined.
- The hydrogen bonding network dictates the formation of a stable 3D framework.
- This structural information is vital for further research into DBTA-based materials.
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