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R4/4 (30) rectangular rings in 2,5-dioxopiperazine-1,4-diacetic acid
Manuela Ramos Silva1, Ana Matos Beja, Jose Antonio Paixão
1CEMDRX, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, P-3004-516 Coimbra, Portugal. manuela@pollux.fis.uc.pt
Summary
This study details the crystal structure of a 2,5-dioxopiperazinedione derivative. Its molecular geometry and hydrogen bonding in the solid state were analyzed, revealing a network of rectangular rings.
Area of Science:
- Crystallography
- Molecular Chemistry
- Quantum Mechanics
Background:
- 2,5-dioxopiperazinedione derivatives are important organic compounds.
- Understanding their solid-state structure is crucial for material science applications.
Purpose of the Study:
- To elucidate the crystal structure of a specific 2,5-dioxopiperazinedione derivative (C8H10N2O6).
- To compare the molecular geometry in the solid state versus the gas phase.
Main Methods:
- X-ray crystallography was used to determine the solid-state structure.
- Ab initio HF-LCAO quantum-mechanical calculations were performed for gas-phase geometry optimization.
Main Results:
- Molecules of the derivative occupy centers of symmetry, exhibiting an almost planar six-membered ring.
- The nitrogen substituent is nearly perpendicular to the ring.
- A strong intermolecular hydrogen bond forms a network of R(4)(4)(30) rectangular rings in the crystal.
Conclusions:
- The crystal packing significantly influences the molecular conformation.
- Hydrogen bonding plays a key role in the self-assembly of these molecules in the solid state.