title: IR spectroscopic characterization of 2-thiohydantoins and 2-thiobarbiturates.
abstract: A characterization of 2-thiohydantoins and 2-thiobarbiturates by IR spectra is proposed, using three characteristic group frequencies: the "thioureide band" around 1500 cm-1 and the antisymmetric-symmetric stretching modes of NCS bonds around 1400 and 1200 cm-1. The general characteristic absorption areas are found by comparison with N-phenylthioureas and thioanilides.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006827:Hydantoins / Q000032:analysis*; D008722:Methods; D013055:Spectrophotometry, Infrared; D013858:Thiobarbiturates / Q000032:analysis*; D013867:Thiohydantoins / Q000032:analysis*
chemical_list: D006827:Hydantoins; D013858:Thiobarbiturates; D013867:Thiohydantoins