Crystal and molecular structure of thiocarbohydrazide

The crystals of thiocarbohydrazide, SC(NH-NH2)2, are monoclinic, space group P2,/c with a = 4"74 (1), b= 15.53 (2), c=7.19 (1) A, fl= 122"4 (1) , Z=4. The structure has been determined from three-dimensional data. One of the two hydrazinic radicals H2N-NHof the molecule is turned toward the sulphur atom. The distances and angles agree very well with those in thiourea and thiosemicarbazide. The thioureide group N-CS-N is planar; the two NH2 groups are out of the plane of the thioureide group and both on the same side. The molecules are held together by weak hydrogen bonds of type NH. --N and NH. • • S.