A New Polymorph of 2-Thiohydantoin

抄録

A new polymorphic crystal of the title compound, C₃H₄N₂OS, belongs to space group P1 with cell dimensions of a = 4.0520(9)Å, b = 6.550(1)Å, c = 9.170(2)Å, α = 100.148(4)°, β = 100.814(4)°, γ = 96.831(4)°, R1 = 0.069. Neighboring molecules are connected to form cyclic dimers via two types of hydrogen bonds, one between the thioamide groups and the other between the amide moieties, showing a distinctive difference from the hydrogen-bonding pattern of the known form.