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July 8, 1947Proceedings of the Royal Society of London A Mathematical and Physical Sciences

The crystal structure of sucrose sodium bromide dihydrate

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Authors

CBC. A. BeeversThe King's CollegeWCWilliam G. CochranHarvard University Press

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Implication

Crystallographic analysis reveals the complete atomic architecture of sucrose sodium bromide dihydrate, confirming that sucrose is structured as alpha-D-glucopyranosido-beta-D-fructofuranoside.

Key Points

  • Determine the complete three-dimensional crystal structure and confirm the exact chemical configuration of sucrose sodium bromide dihydrate.
  • Analyzed orthorhombic crystals (space group P212121; unit cell dimensions a=21.92 Å, b=9.72 Å, c=8.43 Å).
  • Identified bromine atomic positions using Patterson-Harker syntheses and deduced phase signs by measuring intensity variations between isomorphous chloride and bromide derivatives.
  • Computed Fourier electron-density projections along all three crystallographic axes to resolve the complete atomic arrangement.
  • Provided the first direct experimental proof that sucrose is configured as α-D-glucopyranosido-β-D-fructofuranoside.
  • Determined that the pyranose ring takes the Sachse trans form, whereas the compact furanose ring possesses one member atom displaced from the plane of the other four.
  • Established that the crystal lattice is stabilized through hydroxyl groups coordinated to sodium ions, bromide ions, and water molecules, with each hydroxyl forming two external bonds.

Cite This Study

Beevers et al. (1947) studied this question.

synapsesocial.com/papers/6aa3f4317af9c7206bc7ffc3https://doi.org/10.1098/rspa.1947.0075
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