1,4-Dibenzylpiperazine-2,5-dione

@article{Nunez200414Dibenzylpiperazine25dione,
  title={1,4-Dibenzylpiperazine-2,5-dione},
  author={L. N. Nunez and Jesse D. Brown and Adam M. Donnelly and Christine R. Whitlock and Allison J. Dobson},
  journal={Acta Crystallographica Section E-structure Reports Online},
  year={2004},
  volume={60}
}
The title compound, C18H18N2O2, crystallizes in the centrosymmetric monoclinic space group C2/c with half the mol­ecule as the asymmetric unit (mol­ecules are located on inversion centers). π–π interactions between the benzene rings are found, with a perpendicular distance of 3.657 (11) A between ring centroids. 
2 Citations

Figures and Tables from this paper

Sulfolobus solfataricus protein disulphide oxidoreductase: insight into the roles of its redox sites.
TLDR
Each cysteine was mutagenized and the behaviour of the single mutants was investigated elucidating the basis of the electron-shuffling mechanism for SsPDO.
Solution Self-Assembly of Sequence Specific Biomimetic Polymers
TLDR
This thesis focuses on understanding the solution self assembly of a sequence specific biomimetic polymer, namely polypeptoids or poly N-substituted glycines, to fundamentally probe the chain conformation and assembly properties of sequence specific polymers.

References

SHOWING 1-9 OF 9 REFERENCES
Aromatic-aromatic interaction: a mechanism of protein structure stabilization.
TLDR
Analysis of neighboring aromatic groups in four biphenyl peptides or peptide analogs and 34 proteins reveals a specific aromatic-aromatic interaction that helps stabilize tertiary structure, and 20 percent stabilize quaternary structure.
pi-Stacking interactions. Alive and well in proteins.
TLDR
It is found that pairs (dimers) of aromatic side chain amino acids preferentially align their respective aromatic rings in an off-centered parallel orientation, which is referred to as parallel displaced pi-stacking and is consistent with ab initio and molecular mechanics calculations of benzene dimer.
CRYSTALS version 12: software for guided crystal structure analysis
The determination of small-molecule structures from single-crystal X-ray data is being carried out by researchers with little or no crys- tallographic training. At the same time, completely automatic
Completion and refinement of crystal structures with SIR92
An automatic procedure for recovering a complete crystal structure after a direct phasing process is described. The procedure consists mainly of a Fourier recycling method that can be implemented in
A semi-empirical method of absorption correction
An extension of Furnas's method is described. The variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T
A weighting scheme for least-squares structure refinement
The truncated Chebyshev polynomial provides a reliable scheme for the automatic determination of empirical weights for least-squares structure refinement when the errors are a function of |Fo|.
Recent advances in the synthesis of diketopiperazines
The nature of .pi.-.pi. interactions