Synthesis and structure of tetrakis(phenylenethiourea)tellurium(II) chloride dihydrochloride,C28H26N8S4Cl4Te |
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Authors: | GC Rout M Seshasayee G Aravamudan S Sowrirajan |
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Institution: | Department of Physics, Indian Institute of Technology, Madras 600 036, India;Department of Chemistry, Indian Institute of Technology, Madras 600 036, India |
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Abstract: | Reaction of tellurium(IV) with excess phenylenethiourea(2-mercaptobenzimidazole) in aqueous methanolic hydrochloric acid leads to the formation of Te(II) complex, tetrakis(phenylenethiourea)tellurium(II) chloride dihydrochloride. The characterisation and crystal structure of the complex are reported. The crystals are monoclinic, space group P21/c, a = 13.939(5), b = 26.523(9), c = 4.873(2) Å, β = 100.29(4)°, V = 1772.6 Å3, M = 872.4, Dc = 1.651 g cm?3, Z = 2, F(000) = 868, μ(MoKα) = 1.298 mm?1. Final R = 0.055 and RW = 0.056 for 918 independent reflections. The tellurium atom in the molecule lies at the crystallographic centre of symmetry and is bonded to four phenylenethiourea sulphur atoms in a square planar arrangement with TeS(1) = 2.678(6), TeS(2) = 2.674(5) Å and S(1)TeS(2) is 90.5(3)°. The ligand behaves as a thione. Chlorine atoms remain outside the coordination sphere of the Te and stabilise the packing arrangement in the unit cell through hydrogen bondings to nitrogen atoms. |
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Keywords: | Author to whom correspondence should be addressed |
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