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[Untitled]
- Source :
- Journal of Chemical Crystallography. 31:339-343
- Publication Year :
- 2001
- Publisher :
- Springer Science and Business Media LLC, 2001.
-
Abstract
- The title compound including a stable nitroxide radical was synthesized by a reaction of N,N′-diisopropylcarbondiimide (DIC) with 2,2,5,5-tetramethyl-1-oxo-3-pyrroline-3-carboxylic acid (TPCO) in an EtOAc solution under nitrogen atmosphere. From 1:1 EtOAc/hexane the compound crystallizes in triclinic space group P $$\overline 1$$ with a = 11.078(2), b = 11.970(2), c = 15.746(3) A, α = 105.41(3), β = 103.47(3), γ = 106.52(3)°, and Z = 4. In an asymmetric unit two molecules assemble with each other in similar bond distances and angles but show crystallographically independent conformation. A normal single C–N bond is observed in the title compound, other than the partial double C=N bond shown in the parent urea. A longer N–O distance of 1.26 A implies the existence of a single electron π bond between N and O atoms, which stabilizes the radical molecule.
Details
- ISSN :
- 10741542
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Journal of Chemical Crystallography
- Accession number :
- edsair.doi...........20e7080d405fd0cc7fe2338383410176
- Full Text :
- https://doi.org/10.1023/a:1014310208644