Computed Properties of C4H6Br2N2S. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-Bromo-4-methyl-thiazol-2-ylamine hydrobromide, is researched, Molecular C4H6Br2N2S, CAS is 79247-77-1, about An infrared study of rotational isomerism in thiazole-2-carboxylates. Author is Kaye, Perry T.; Meakins, G. Denis; Willbe, Charles; Williams, Peter R..
Twenty-five alkyl thiazole-2-carboxylates with a range of 4- and 5-substituents were prepared through the Hantzsch synthesis. E.g., cyclocondensation reaction of (H2N)2CS with MeCOCH2Br followed by bromination, oxidation, and alkylation gave the thiazole esters I (R = Me, Et). Solutions of these esters show well resolved doublets in the carbonyl IR spectra, due to rotational isomers. The higher wave number components were assigned to the more polar carbonyl O,S-anti-s-trans rotamers and those at lower wave number to the O,S-syn-s-trans forms. Small, but systematic, differences between the Me esters were noted.
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