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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 19, Number 1
BKCSDE 19(1)
January 20, 1998 

Tautomeric and Ab Initio Studies of 5-Thioxo-3H,4H-1,3,4-thiadiazolidin-2-one
Nam Sook Cho*, Chang Kwon Park, Hyun Sook Kim, Eun Suk Choi, Sung Kwon Kang
The oxidation product bis(2-oxo-3H-1,3,4-thiadiazolidinyl)-5,5-disulfide (5b) was obtained from an attempted synthesis of 5-thioxo-3H,4H-1,3,4-thiadiazolidin-2-one (1). Spectroscopic results indicate that the most stable tautomeric form of 1 is the lactam-thiol form (1b). The computed total energies and relative energies at the MP4 level also showed that the most stable tautomer is 1b.
103 - 106
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