Solubility of Thiourea in C1 to C6 1-Alcohols

Kim, Kwang‐Joo; Lee, Choul-Ho; Ryu, Sheung-Kon

doi:10.1021/je00014a008

Cited by 18 publications

(11 citation statements)

References 1 publication

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“…To verify the accuracy of this experiment, another experiment was done in which the solubility of thiourea in 1-butanol was determined. Compared with the literature data (Kim et al, 1994), the deviation of the solubility was <2%.…”

Section: Methodscontrasting

confidence: 56%

Solubility of Sodium Dimethyl Isophthalate-5-sulfonate in Water and in Water + Methanol Containing Sodium Sulfate

Qin

Gao

et al. 2000

J. Chem. Eng. Data

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Section: Methodscontrasting

confidence: 56%

Solubility of Sodium Dimethyl Isophthalate-5-sulfonate in Water and in Water + Methanol Containing Sodium Sulfate

Qin

Gao

et al. 2000

J. Chem. Eng. Data

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“…35 Notably, in our experiments the initial point, T 0 , at which the DSC curve deviates from the baseline is lower than the melting temperature of thiourea, which is reported to be around 175.05 °C and 179.05 °C. 36,37 In addition, the calculated reaction enthalpies yield an average value of 6.8 kJ‚mol -1 , which is also less than 12.6 kJ‚mol -1 reported by other groups. 36 Because we had always used freshly prepared thiourea, the decomposition of thiourea (i.e., aging) is unlikely responsible for the above abnormal behavior.…”

Section: Resultsmentioning

confidence: 63%

“…36,37 In addition, the calculated reaction enthalpies yield an average value of 6.8 kJ‚mol -1 , which is also less than 12.6 kJ‚mol -1 reported by other groups. 36 Because we had always used freshly prepared thiourea, the decomposition of thiourea (i.e., aging) is unlikely responsible for the above abnormal behavior. Isomerization of thiourea has been proposed earlier by Waddell in the study of the conversion of thiourea into thiocyanate.…”

Section: Resultsmentioning

confidence: 63%

Thermodynamic Analysis of Decomposition of Thiourea and Thiourea Oxides

2005

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Thiourea has exhibited extremely rich dynamical behavior when being oxidized either through a chemical approach or via an electrochemical method. In this study, thermodynamic properties of thiourea and its oxides are investigated by measuring their thermogravimetry (TG), differential thermogravimetry (DTG), and differential scanning calorimetry (DSC) simultaneously. Online FT-IR measurements show that products of the thermal decomposition vary significantly with the reaction temperature. In addition to the determination of their apparent activation energy (E), preexponential factor (A), and entropy (DeltaS++), enthalpy (DeltaH++), and Gibbs energy (DeltaG++) of thermal decomposition, our investigation further illustrates that the decomposition kinetics of thiourea and thiourea oxides follows the Johnson-Mehl-Avrami Equation, f (alpha) = n(1 - alpha)[-ln(1 - alpha)](1-1/n) and G(alpha) = [-ln(1 - alpha)](1/n) with n equal to 2, 3.43, and 3, respectively.

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“…7.179 ± 0.015 (27) (23) 15 (23) , 13.8 (18) 452.2 (19) 12.55 (19) 445.52 (20) 14.42 (20) (18) Donnelly et al, (19) and Kim et al (20) for thiourea. However, results from references 21 to 23 as a whole cannot be considered fully comparable with ours for the following reasons: commercial products were employed as received without any purification; no information is given about calibration procedures for both t.g.…”

Section: Resultsmentioning

confidence: 99%

“…After the d.s.c. measurements by Zordan et al (18) in 1972 and the more recent determinations by Donnelly et al (19) and Kim et al (20) which only concern thiourea, there have been only the t.g., d.t.a. and i.r.…”

Section: Introductionmentioning

confidence: 92%