Novel Mesityltellurium Cations from Selenenation and Tellurenation Reactions of Dimesityl Telluride in the Presence of the Br2/AgSbF6 Reagent

A Structural Comparison of Organoterminated Selenide, Diselenide, and Triselenide

“…1,2,3-Triselena- [3]ferrocenophane 1 has been prepared by oxidation of dilithioferrocene with gray selenium following a published procedure. 8 The analytical and spectroscopic data are in good agreement with the literature.…”

“…Crystals of 1 have been obtained by slow evaporation of a heptane solution at room temperature. According to single crystal X-ray diffraction studies at 92 K, 1,2,3-triselena- [3]ferrocenophane 1 crystallizes in the monoclinic space group P2 1 /c. A crystal structure of the same compound has been previously described in an orthorhombic modification (1 ort ), which in fact shows a markedly different packing in the unit cell.…”

“…The H atoms are drawn with arbitrary radii. (6) 1.893 (7) C(11)-Se(1)-Se (2) 99.08 (19) 98.9 (2) Se(1)-Se(2)-Se (3) 100.06 (4) 100.68 (4) C(31)-Se(3)-Se (2) 98.9 (2) 99.0 (23) C(11)-Se(1)-Se(2)-Se (3) 73.6 (2) 75.3 (2) Se(1)-Se(2)-Se(3)-C(31) −74.0 (2) −72.7 (2) triselenane-unit approach ±74 • ( Table 1). These geometric parameters are slightly different compared to open chain triselenanes 11 but quite similar to those obtained for the orthorhombic modification (1 ort ) of the same compound (Table 1).…”

A Structural Comparison of Organoterminated Selenide, Diselenide, and Triselenide

“…1,2,3-Triselena- [3]ferrocenophane 1 has been prepared by oxidation of dilithioferrocene with gray selenium following a published procedure. 8 The analytical and spectroscopic data are in good agreement with the literature.…”

“…Crystals of 1 have been obtained by slow evaporation of a heptane solution at room temperature. According to single crystal X-ray diffraction studies at 92 K, 1,2,3-triselena- [3]ferrocenophane 1 crystallizes in the monoclinic space group P2 1 /c. A crystal structure of the same compound has been previously described in an orthorhombic modification (1 ort ), which in fact shows a markedly different packing in the unit cell.…”

“…The H atoms are drawn with arbitrary radii. (6) 1.893 (7) C(11)-Se(1)-Se (2) 99.08 (19) 98.9 (2) Se(1)-Se(2)-Se (3) 100.06 (4) 100.68 (4) C(31)-Se(3)-Se (2) 98.9 (2) 99.0 (23) C(11)-Se(1)-Se(2)-Se (3) 73.6 (2) 75.3 (2) Se(1)-Se(2)-Se(3)-C(31) −74.0 (2) −72.7 (2) triselenane-unit approach ±74 • ( Table 1). These geometric parameters are slightly different compared to open chain triselenanes 11 but quite similar to those obtained for the orthorhombic modification (1 ort ) of the same compound (Table 1).…”

Mesityltellurenyl Cations Stabilized by Triphenylpnictogens [MesTe(EPh3)]+ (E = P, As, Sb)

“…A similar mechanism involving tellurenyl cations RTe + may be operative for the reaction of Mes 2 Te with triflic acid. Unlike [MesTe(TeMes 2 )]SbF 6 , 13,14 1 is readily soluble in organic solvents, such as CH 2 Cl 2 , CHCl 3 , tetrahydrofuran (THF), and MeCN, thus enabling characterization in solution.…”

“…The migration of aryl groups is not unprecedented in tellurium chemistry, which holds particularly true for mesityltellurium compounds. 14 The formation of the anion 4b can be rationalized when the assumed Sb product of the phenyl group migration, Ph 2 SbO 3 SCF 3 , reacted with additional triflate ions. The Te product of the phenyl group migration, the unsymmetrical diaryltelluride MesPhTe, was identified in the mother liquor by its 125 Te NMR chemical shift (419.7 ppm) after most of the Mes 2 Te and 4 were removed by crystallization.…”

A Structural Comparison of Organoterminated Selenide, Diselenide, and Triselenide

“…1,2,3-Triselena- [3]ferrocenophane 1 has been prepared by oxidation of dilithioferrocene with gray selenium following a published procedure. 8 The analytical and spectroscopic data are in good agreement with the literature.…”

“…Crystals of 1 have been obtained by slow evaporation of a heptane solution at room temperature. According to single crystal X-ray diffraction studies at 92 K, 1,2,3-triselena- [3]ferrocenophane 1 crystallizes in the monoclinic space group P2 1 /c. A crystal structure of the same compound has been previously described in an orthorhombic modification (1 ort ), which in fact shows a markedly different packing in the unit cell.…”

“…The H atoms are drawn with arbitrary radii. (6) 1.893 (7) C(11)-Se(1)-Se (2) 99.08 (19) 98.9 (2) Se(1)-Se(2)-Se (3) 100.06 (4) 100.68 (4) C(31)-Se(3)-Se (2) 98.9 (2) 99.0 (23) C(11)-Se(1)-Se(2)-Se (3) 73.6 (2) 75.3 (2) Se(1)-Se(2)-Se(3)-C(31) −74.0 (2) −72.7 (2) triselenane-unit approach ±74 • ( Table 1). These geometric parameters are slightly different compared to open chain triselenanes 11 but quite similar to those obtained for the orthorhombic modification (1 ort ) of the same compound (Table 1).…”

Mesityltellurenyl Cations Stabilized by Triphenylpnictogens [MesTe(EPh3)]+ (E = P, As, Sb)

“…A similar mechanism involving tellurenyl cations RTe + may be operative for the reaction of Mes 2 Te with triflic acid. Unlike [MesTe(TeMes 2 )]SbF 6 , 13,14 1 is readily soluble in organic solvents, such as CH 2 Cl 2 , CHCl 3 , tetrahydrofuran (THF), and MeCN, thus enabling characterization in solution.…”

“…The migration of aryl groups is not unprecedented in tellurium chemistry, which holds particularly true for mesityltellurium compounds. 14 The formation of the anion 4b can be rationalized when the assumed Sb product of the phenyl group migration, Ph 2 SbO 3 SCF 3 , reacted with additional triflate ions. The Te product of the phenyl group migration, the unsymmetrical diaryltelluride MesPhTe, was identified in the mother liquor by its 125 Te NMR chemical shift (419.7 ppm) after most of the Mes 2 Te and 4 were removed by crystallization.…”

A Structural Comparison of Organoterminated Selenide, Diselenide, and Triselenide

“…1,2,3-Triselena- [3]ferrocenophane 1 has been prepared by oxidation of dilithioferrocene with gray selenium following a published procedure. 8 The analytical and spectroscopic data are in good agreement with the literature.…”

“…Crystals of 1 have been obtained by slow evaporation of a heptane solution at room temperature. According to single crystal X-ray diffraction studies at 92 K, 1,2,3-triselena- [3]ferrocenophane 1 crystallizes in the monoclinic space group P2 1 /c. A crystal structure of the same compound has been previously described in an orthorhombic modification (1 ort ), which in fact shows a markedly different packing in the unit cell.…”

“…The H atoms are drawn with arbitrary radii. (6) 1.893 (7) C(11)-Se(1)-Se (2) 99.08 (19) 98.9 (2) Se(1)-Se(2)-Se (3) 100.06 (4) 100.68 (4) C(31)-Se(3)-Se (2) 98.9 (2) 99.0 (23) C(11)-Se(1)-Se(2)-Se (3) 73.6 (2) 75.3 (2) Se(1)-Se(2)-Se(3)-C(31) −74.0 (2) −72.7 (2) triselenane-unit approach ±74 • ( Table 1). These geometric parameters are slightly different compared to open chain triselenanes 11 but quite similar to those obtained for the orthorhombic modification (1 ort ) of the same compound (Table 1).…”

Mesityltellurenyl Cations Stabilized by Triphenylpnictogens [MesTe(EPh3)]+ (E = P, As, Sb)

“…A similar mechanism involving tellurenyl cations RTe + may be operative for the reaction of Mes 2 Te with triflic acid. Unlike [MesTe(TeMes 2 )]SbF 6 , 13,14 1 is readily soluble in organic solvents, such as CH 2 Cl 2 , CHCl 3 , tetrahydrofuran (THF), and MeCN, thus enabling characterization in solution.…”

“…The migration of aryl groups is not unprecedented in tellurium chemistry, which holds particularly true for mesityltellurium compounds. 14 The formation of the anion 4b can be rationalized when the assumed Sb product of the phenyl group migration, Ph 2 SbO 3 SCF 3 , reacted with additional triflate ions. The Te product of the phenyl group migration, the unsymmetrical diaryltelluride MesPhTe, was identified in the mother liquor by its 125 Te NMR chemical shift (419.7 ppm) after most of the Mes 2 Te and 4 were removed by crystallization.…”