Crystal and molecular structure of L‐cis‐3,6‐dimethyl‐2,5‐piperazinedione (L‐alanyl‐L‐alanyl‐2,5‐diketopiperazine)
- 1 May 1969
- journal article
- research article
- Published by Wiley in Biopolymers
- Vol. 7 (5) , 751-764
- https://doi.org/10.1002/bip.1969.360070510
Abstract
The crystal structure of L‐cis‐3, 6‐dimethyl‐2,5‐piperazinedione (L‐alanyl‐L‐alanyl‐2,5‐diketopinerazine) has been determined. The unit cell is triclinic with a = 8.05, b = 6.08, c = 5.15 Å, α = 131.7°, β = 82.4°, γ = 106.6°. The space group is P1 with one molecule per unit cell. The six‐membered ring is found to be nonplanar with an angle between the two amide group planes of 26°. One amide group deviates slightly from planarity. The experimental molecular model is discussed in terms of its flexibility.Keywords
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