1. The crystal structure of a novel bicyclic lactone derivative containing a ?Chiral Malonate? Unit
- Author
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Stephen Hanessian, François Brisse, and Pierre Dextraze
- Subjects
chemistry.chemical_classification ,Bicyclic molecule ,Stereochemistry ,General Chemistry ,Crystal structure ,Condensed Matter Physics ,Ring (chemistry) ,chemistry.chemical_compound ,Malonate ,chemistry ,Structural Biology ,Orthorhombic crystal system ,Carboxylate ,Spectroscopy ,Lactone ,Derivative (chemistry) - Abstract
Crystals of the phenylurethane derivative of a novel bicyclic lactone, C18H21NO8, have an orthorhombic unit cell of dimensionsa = 8.648(2),b = 11.041(7),c = 19.589(4) A, and belong to space groupP212121. The structure was solved by direct methods and was refined by the block diagonal approximation to a finalR value of 0.034 using 1035 reflections. The structure is made up of a six-membered lactone ring, in the boat conformation,cis-fused to a five-membered oxolane ring. The phenylurethane and the methoxy groups aretrans to each other, while the ethyl carboxylate group is attached in equatorial position.
- Published
- 1981
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