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• W2321834237 abstract "An improved synthesis of the tellurium diimide dimer tBuNTe(μ-NtBu)2TeNtBu (1) using THF as solvent is reported. The reactions of 1 with tellurium tetrahalides (1:2 molar ratio) in THF give high yields of tert-butylimidotellurium dihalides (tBuNTeX2)n (2a, X = Cl, n = 6; 2b, X = Br). The intermediate tBuNTe(μ-NtBu)2TeCl2 (3) is obtained when a 3:2 molar ratio is used. The dibromide 2b may also be prepared by halide exchange between 2a and 2 equiv of Me3SiBr. The crystal structure of 2a·2THF reveals a hexamer formed by linking three (tBuNTeCl2)2 dimers via chloride bridges. The Cl ligands in the central dimer occupy the axial positions of a distorted trigonal bipyramid on both Te atoms. In the two terminal dimers one of the Te atoms has both Cl ligands in axial positions, whereas the other Te is attached to one axial Cl substituent and one equatorial Cl substituent. There are weak Te···Cl interactions between hexamer units in the range 3.107(1)−3.704(1) Å. Crystals of 2a·2THF are monoclinic, space group C2/c, a = 35.2264(9) Å, b = 11.4548(3) Å, c = 14.3656(4) Å, β = 101.645(1)°, V = 5677.4(3) Å3, and Z = 8. The reaction of 2a with 2 equiv of KOtBu in THF produces (tBuO)2Te(μ-NtBu)Te(OtBu)2 (4). The crystal structure of 4 comprises a centrosymmetric dimer with a planar Te2N2 ring and significantly different Te−N bond lengths [1.943(4) and 2.217(4) Å]. Crystals of 4 are triclinic, space group P1̄, a = 9.646(5) Å, b = 10.899(5) Å, c = 9.439(4) Å, α = 94.12(4)°, β = 118.89(3)°, γ = 65.26(4)°, V = 778.5(7) Å3, and Z = 2." @default.
• W2321834237 created "2016-06-24" @default.
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• W2321834237 date "1999-10-29" @default.
• W2321834237 modified "2023-10-11" @default.
• W2321834237 title "Synthesis and Reactions of <i>tert</i>-Butylimidotellurium Dihalides: X-ray Structures of [Cl₂Te(<i>μ</i>-N^tBu)₂TeCl₂]₃ and (^tBuO)₂Te(<i>μ</i>-N^tBu)₂Te(O^tBu)₂" @default.
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• W2321834237 doi "https://doi.org/10.1021/ic990849k" @default.
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