Open AccessAn X-ray examination of iodo-succinimide
Author(s) -
Kathleen Yardley
Publication year - 1925
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1925.0090
Subject(s) - succinimide , orthorhombic crystal system , tetragonal crystal system , chemistry , iodide , benzene , hydrogen bond , imide , methylene , crystallography , molecule , acetone , stereochemistry , crystal structure , polymer chemistry , medicinal chemistry , organic chemistry
Succinimide crystallises in the orthorhombic system with eight asymmetric molecules in the unit cell. When, however, the hydrogen of the -imide group is replaced by iodine, the resulting compound crystallises in the tetragonal system, its unit cell showing no resemblance whatever to that of the parent substance. Groth describes the crystals of iodo-succinimide as- Ditetragonal pyramidal.a :c = 1 : 0.8733. Dr. Tutton has remeasured the axial ratio with great precision and founda :c = 1 : 0.8739. Very fine small crystals were grown from acetone; the outward form of these showed clearly their polar character (fig. 1). A preliminary measurement of the density was made by the suspension method (the liquid used being a mixture of benzene and methylene iodide in variable proportions), and it was found to be 2.41 grs./c. c. A more accurate determination by Tutton gave 2.408 grs./c. c.