Abstract

The structure of ethyl 2-amino-4-tert-butyl-1,3-thia­zole-5-carboxyl­ate, C10H16N2O2S, (I), and the structure of the 1:1 adduct 6-methyl­imidazo­[2,1-b]­thia­zole–2-amino-1,3-thia­zole (1/1), C6H6N2S·C3H4N2S, (II), have been determined. The mol­ecules in (I) associate via a hydrogen-bonded R{_2^2}(8) dimer consisting of N—H⋯N interactions, with the hydrogen-bonding array additionally involving N—H⋯O interactions to one of the carboxyl­ate O atoms. The 2-amino­thia­zole mol­ecules in (II) also associate via an N—H⋯N hydrogen-bonded R{_2^2}(8) dimer, with an additional N—H⋯N interaction to the Nsp2 atom of the imidazo­thia­zole moiety, creating hydrogen-bonded quartets.

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