E. Benedetti, P. Corradini, M. Goodman
Mar 1, 1969
Citations
0
Influential Citations
14
Citations
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abstract
The relevant results of accurate X-ray analyses of both the trans-and the L-cis-3,6-dimethyl-2,5-piperazinediones (diketopiperazines) are reported. We note that a large variability of conformations for the ring system can be accomplished by coupling small bond-angle deformations with large variations of the internal rotation angles. The experimental molecular models are discussed in terms of these changes and in terms of nonbonded intramolecular interactions.