Abstract:The structures of 2-amino-5-methyl-1,3,4-thiadiazole, C(3)H(5)N(3)S, and 2-amino-5-ethyl-1,3,4-thiadiazole, C(4)H(7)N(3)S, have been determined for comparison with unsubstituted 2-amino-1,3,4-thiadiazole. Despite their different space groups (P2(1)/n and Pbca, respectively), the packing modes of the methyl and ethyl derivatives are similar, with comparable three-dimensional hydrogen-bonding associations. This is in contrast to the hydrogen-bonding network in 2-amino-1,3,4-thiadiazole, which is one-dimensional … Show more
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