Experimental

R factor = 0.041; wR factor = 0.114; data-to-parameter ratio = 18.6. The title compound, C8H10N2S, was prepared by reaction of methylamine solution, KOH and phenyl-isothiocyanate in ethanol. It adopts a syn-Me and anti-Ph conformation relative to the C S double bond. The dihedral angle between the N— C ( S)—N thiourea and phenyl planes is 67.83 (6). In the crystal, the molecules centrosymmetrical dimers by pairs of N(Ph)—H S hydrogen bonds. The dimers are linked by N(Me)—H S hydrogen bonds into layers parallel to (100). Related literature For applications of thiourea derivatives, see: Madan & Tanej