Synthesis and characterization of thiourea

• Autorzy: Dai Chuanbo , Zhang Hongyu , Li Ruiduan , Zou Haifeng

Identyfikatory

DOI

10.2478/pjct-2019-0027

• Języki publikacji: EN

Abstrakty

EN

Herein, a simple and effective method for the preparation of thiourea using a nucleophilic substitution reaction is reported. Urea and Lawesson’s reagent were used as the raw materials to prepare thiourea via a one-step method involving the sulfuration reaction, and the reaction mechanism was analyzed. The effect of the reaction time, reaction temperature, and mass ratio of the raw materials on the yield of thiourea were investigated.The most beneficial conditions used for the reaction were determined to be: Reaction time = 3.5 h, reaction temperature = 75°C, and mass ratio of urea to Lawesson’s reagent = 2:1. Under these optimal conditions, the average yield of thiourea over five replicate experiments was 62.37%. Characterization using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and thermogravimetric analysis (TGA) showed that the as-synthesized substance was thiourea. Our synthetic method has the advantages of high yield, mild reaction conditions and simplicity.

Słowa kluczowe

EN

Urea; Lawesson’s reagent; thiourea; vulcanization reaction; Nucleophilic substitution

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2019
• Tom: Vol. 21, nr 3
• Strony: 35--39
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Dai Chuanbo

• Jiaying College, Meizhou 514021, China

autor

Zhang Hongyu

• Jilin University, College of Chemistry, Changchun 130021, China
• Jilin Institute of Chemical Technology, Jilin 132022, China
• Jiaying College, Meizhou 514021, China

autor

Li Ruiduan

• Jilin Institute of Chemical Technology, Jilin 132022, China

autor

Zou Haifeng

• Jilin University, College of Chemistry, Changchun 130021, China

Bibliografia

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• 2. Vallavoju, N., Selvakumar, S. & Pemberton, B.C., et al. (2016). Organophotocatalysis: Insights into the Mechanistic Aspects of Thiourea-Mediated Intermolecular [2+2] Photocycloadditions[J]. Angewandte Chemie, 128(18), 5536–5541. DOI: 10.1002/anie.201600596.
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• 10. Xu, D. (2012) Preparation and application of substituted thiourea. Nanjing University of Science and Technology, Nanjing.
• 11. Ji, W. The Researeh for Novel Synthesis of Thiourea and ItS Use, Nanjing University of Technology, Nanjing. 2005, 2
• 12. Li, Z. (2005) Study on the new process of preparing thiourea from urea. Tianjin University, TianJin, China. 5–6.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).