The influence of hydrogen bonding on the character of N—H and C=O stretching modes in 2-thiopyrrole-1,2-dicarboximide
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The infrared spectra (200–4000 cm−1) of 2-thiopyrrole-1,2-dicarboximide (TPH) in solid and solution forms have been measured as a function of temperature, and a direct correlation has been obtained between the two phases and the type and extent of hydrogen bonding. It is suggested that TPH exists as cyclic dimer in the solid state (below 310 K) and in dilute solutions by the formation of two equivalent hydrogen bonds. At the transition temperature, ~310 K, the cyclic dimer undergoes to the open-cyclic dimer and persists in this structure till 410 K. In addition, the thermodynamical functions ΔH0, and ΔS0 have been estimated using the spectral data in solution.
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2021 ◽
2020 ◽
Vol 22
(14)
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pp. 7497-7506
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Philosophical Transactions of the Royal Society of London Series A Physical and Engineering Sciences
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1993 ◽
Vol 345
(1674)
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pp. 57-66
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2007 ◽
Vol 63
(2)
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pp. 303-308
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2003 ◽
Vol 58
(1)
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pp. 74-84
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2004 ◽
Vol 59
(10)
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pp. 1114-1117
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