Kristallstruktur und thermisches Verhalten der Additionsverbindungen von Trithiocyanursäure mit Tetrahydrofuran und 1,4-Dioxan

Summary The addition compounds trithiocyanuric acid-tetrahydrofuran (1), 2-trithiocyanuric acid-3-(1,4-dioxane) (2) and 2-trithiocyanuric acid-(1,4-dioxane) (3) were prepared and their thermogravimetric behaviour studied. X-ray crystal structure analyses of1 and2 were carried out at 100 K.1: (HNCS)₃·C₄H₈O,M _r=249.37, monoclinic, P 2₂/c,a=11.105 (1),b=12.715 (1),c=7.825 (1) Å, =83.32 (1)°,V=1097.4(1) ų,Z=4,d _x=1.509 g/cm³,R=3.65%,R _w=3.53% (1 929 observables, 147 parameters).2: 2 (HNCS)₃·3C₄H₈O₂,M _r=618.83, triclinic, ,a=4.339(1),b=12.471(1),c=13.265(1) Å, =73.08(1)°, =84.29(1)°, =80.73(1)°,V=677.1(2) ų,Z=1,d _x=1.518 g/cm³,R=4.20%,R _w=3.75% (2 521 observables, 223 parameters). Finally, the solubilities of cyanuric acid (4) and of trithiocyanuric acid (5) in water, methanol, tetrahydrofuran and 1,4-dioxane at 25°C were determined.