Characterization and thermal analysis of thiourea and bismuth trichloride complex |
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| Authors: | Shao Rong Luan Yi Hua Zhu Yu Qing Jia Qing Cao |
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| Institution: | (1) Research Center of Analysis and Test, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China;(2) Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China;(3) Department of Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China |
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| Abstract: | A complex of thiourea and bismuth trichloride has been synthesized. Its composition is Bi3Cl9SC(NH2)2]7. Crystallographic data are a = 7.141(2) Å, b = 8.820(3) Å, c = 16.365(5) Å, α = 99.389(4)°, β = 95.422(4)°, γ = 106.177(4)°, triclinic system. There are the mononuclear anion BiCl5SC(NH2)2]2? and the dinuclear cation {Bi2Cl4SC(NH2)2]6}2+ with the Bi–Cl–Bi bridge bonds in the complex. The electric conductance of the absolute methanol solution contained the complex indicates that the complex is an ionic compound. Raman spectra indicate that the bismuth ion is coordinated by the sulfur atoms of the thiourea. The thermal analysis verifies the structure of complex. The TG–MASS curves show the structure rearrangement in the complex at about 118 °C. The DSC curves and calculation means that the structure rearrangement is irreversible. |
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