Abstract
4-Amino-4-carboxylthiapyran hydrobromide crystallizes in the monoclinic space groupP21/m, witha= 9.72 Å,b= 6.60 Å andc=7.10 Å,β = 94.8 ° andZ= 2. The structure was solved by the heavy atom method with 786 observed reflections and refined to anR of 0.076. There is an interesting weak interaction which the hetero sulfur atom of the thiapyran ring makes with a symmetry related amino nitrogen (N...S distance 3.34 Å) which significantly affects the “puckered-chair” conformation of the thiapyran ring.
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Contribution No. 405 from the Centre of Advanced Study in Physics, University of Madras, Madras-600025, India.
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Chacko, K.K., Bhattacharjee, S.K. & Zand, R. Crystal and molecular structure of 4-amino-4-carboxyl thiapyran hydrobromide. Journal of Crystal and Molecular Structure 5, 295–303 (1975). https://doi.org/10.1007/BF01270618
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DOI: https://doi.org/10.1007/BF01270618