W. Schuckmann, H. Fuess,, Oskar Mösinger
May 1, 1978
Citations
2
Influential Citations
6
Citations
Journal
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
Abstract
1-Oxo-1-24-1,2,4-thiadiazolidin-3-ones are obtained by the oxidation of 2-imino-1,3-thiazetidines with H202/ glacial acetic acid. The molecular and crystal structure of this system was solved by X-ray structure analysis of the 2-methyl-4-phenyl and 2-benzyl-4-phenyl derivatives. 2-Methyl-l-oxo-4-phenyl-l-24-1,2,4 thiadiazolidin-3-one (C9HIoN202S) is orthorhombic, space group Pbca, a = 38.540 (10), b = 6.537 (2), c = 7.778 (2) A; the 2-benzyl-4-phenyl derivative (C~sHI4N202S) is monoclinic, space group P2Jc, a = 8-515 (3), b = 6-251 (2), c = 25.775 (9) A, fl = 97.59 (5) °. The thiadiazolidine rings are very similar in both compounds and show pronounced deviations from planarity with the S atom out of the plane of the other four atoms.