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Updated: Apr 30, 2026

Preparation of Contiguous Bisaziridines for Regioselective Ring-Opening Reactions
Published on: July 28, 2022
N,N'-(Ethane-1,2-di-yl)bis-(methane-sulfon-amide)
Wesley Ting Kwok Chan1, Ka Yan Karen Kung2, Man-Kin Wong2
1Laboratory of X-Ray Crystal Structure Analysis, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong S.A.R.
This study details the molecular structure of C4H12N2O4S2, revealing crystallographic inversion symmetry and disordered nitrogen-carbon-nitrogen sites. Hydrogen bonds form sheet-like crystal structures, offering insights into chemical bonding.
Area of Science:
- Crystallography
- Molecular Chemistry
- Solid-State Chemistry
Background:
- Understanding the precise arrangement of atoms in a molecule is crucial for predicting its properties and reactivity.
- Crystallographic studies provide fundamental data on molecular geometry and intermolecular interactions.
- The compound C4H12N2O4S2 was synthesized and selected for structural analysis.
Purpose of the Study:
- To elucidate the detailed three-dimensional molecular structure of C4H12N2O4S2.
- To investigate the presence of symmetry elements and atomic disorder within the crystal lattice.
- To characterize the intermolecular interactions, specifically hydrogen bonding, that govern the crystal packing.
Main Methods:
- Single-crystal X-ray diffraction was employed to collect diffraction data.
- The crystal structure was solved and refined using standard crystallographic software.
- Analysis of bond lengths, bond angles, and intermolecular contacts was performed.
Main Results:
- The molecular structure of C4H12N2O4S2 exhibits crystallographic inversion symmetry.
- The central N-C-C-N unit was found to be disordered over two distinct crystallographic sites with a 3:1 occupancy ratio.
- Intermolecular N-H⋯O hydrogen bonds were identified, linking molecules into extended sheet structures parallel to the b-axis.
Conclusions:
- The crystal structure of C4H12N2O4S2 is characterized by inversion symmetry and significant conformational disorder.
- Hydrogen bonding plays a critical role in organizing the molecules into a specific layered architecture.
- The findings provide valuable structural information for this sulfur-containing organic compound.
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