AuszugDie Kristallstruktur von C3H5N2SOCI wurde mittels dreidimensionaler Patterson-Synthese bestimmt. Zur Lösung des Phasenproblems wurde die Schweratom-Methode angewandt.Die rhombischen Kristalle gehören der Raumgruppe Pbca -j an; sie haben die Gitterkonstanten a = 9,53(1) Ä, 6 = 17,61(5) Ä, c = 7,71(1) Ä und enthalten acht Moleküle in der Elementarzelle; Dber = 1,566 g · cm -3 .Die Struktur-Verfeinerung führte auf Grund von 706 Interferenzen und unter Verwendung von anisotropen Wärmeschwingungs-Faktoren (außer für H) zu einem Endwert von R = 12,3%.Das Molekül, C1 ausgenommen, ist eben. Bindungslängen und -winkel werden angegeben. AbstractThe crystal structure of 2-imino-4-oxo-l,3-thiazolidine hydrochloride C3H5N2SOCI has been determined by x-ray diffraction methods by threedimensional Patterson synthesis using heavy-atom method for solving the phase problem. The crystals are orthorhombic with space group Pbca -having cell dimensions a = 9.53(1) A, b = 17.61(5) Ä, and c = 7.71(1) A. There are eight molecules per unit cell giving a calculated density of 1.566 g-cm -3 . The refinement by least-squares method with anisotropic temperature factors for non-hydrogen atoms led to a final R value of 12.3°/o for 706 reflections. Excepting chlorine the molecule is planar. Bond lengths and bond angles are calculated and discussed.Experimental 2-Imino-4-oxo-l,3-thiazolidine hydrochloride crystallizes as colourless needle-shaped crystals with the c axis being parallel to needle direction (longest direction). Single-crystal rotation and Weissenberg photographs were taken using Cu radiation down a and c axes. The
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