153289-22-6

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• 162088-75-7 (2,4,6-tris[bis(trimethylsilyl)methyl]phenyl)dibromo(2,4,6-triisopropylphenyl)germane 
• 513-81-5 2,3-dimethyl-buta-1,3-diene 
• 152291-69-5 {2,4,6-tris(bis(trimethylsilyl)methyl)phenyl}(2,4,6-triisopropylphenyl)germylene 
• 115160-05-9 1-bromo-2,4,6-tris[bis(trimethylsilyl)methyl]benzene 
• 21524-34-5 2,4,6-triisopropyl-1-bromobenzene 

Relevant academic research and scientific papers

The first kinetically stabilized germanethiones and germaneselones: Syntheses, structures, and reactivities

The first kinetically stabilized germanethiones (germanium-sulfur double-bond species) and germaneselones (germanium-selenium double-bond species) were synthesized. Dechalcogenation of the novel 1,2,3,4,5-tetrachalcogenagermolane Tbt(TiP)GeX4 (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Tip = 2,4,6-triisopropylphenyl, X = S or Se) with 3 molar equiv of triphenylphosphine gave diaryl-substituted germanethione Tbt(Tip)Ge=S 1a and germaneselone Tbt(Tip)Ge=Se 2a as orange-yellow crystals and red crystals, respectively, which were unstable in air but thermally quite stable. Chalcogenation of germylene Tbt(Dis)Ge: resulted in the isolation of the corresponding germanethione Tbt(Dis)Ge-S 1b and germaneselone Tbt(Dis)Ge=Se 2b (Dis = bis(trimethylsilyl)methyl). The molecular structures of germanethione 1a and germaneselones 2a,b determined by X-ray crystallographic analysis indicate that they have trigonal planar geometies around the germanium atom and a remarkably shorter Ge-S (2.049(3) A for 1a) or Ge-Se bond lengths (2.180(2) A for 2a and 2.173(3) A for 2b), compared with that of typical single bonds. The double-bond characters are also reflected in their spectral data such as UV/vis (1a, 450 nm; 1b, 432 nm; 2a, 519 nm; 2b, 492 nm), Raman (1a, 521 cm-1; 1b, 512 cm-1; 2a, 381 cm-1; 2b, 386 cm-1), and 77Se NMR (2a, 941 ppm; 2b, 872 ppm). The germanethiones and germaneselones underwent [2 + 2] (with phenyl isothiocyanate), [3 + 2] (with mesitonitrile oxide), and [4 + 2] cycloadditions (with 1,3-dienes) to give the corresponding adducts in high yields. The regioselectivities of the [4 + 2] cycloadditions were examined using unsymmetrical dienes such as isoprene and interpreted in terms of the interaction between LUMO of the Ge=X unit and HOMO of the diene part.

Synthesis and Structure of the First Germaketenedithioacetal

Treatment of an overcrowded diarylgermylene Tbt(Tip)Ge: 1 phenyl, Tip = 2,4,6-triisopropylphenyl> with carbon disulfide affords the first germaketenedithioacetal derivative 3 as a stable orange crystalline compound, for which the molecular structure is established by X-ray crystallographic analysis.

Synthesis and crystal structure of the first base-free diarylgermylene-transition metal mononuclear complexes

The first base-free diarylgermylene-transition metal mononuclear complexes Tb(Tip)Ge=M-(CO)5 (1, M = W; 2, M = Cr; Tb = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Tip = 2,4,6-triisopropylphenyl) were synthesized by the reaction of a new type of kinetically stabilized diarylgermylene Tb(Tip)Ge: (3), obtained by the treatment of germanium(II) iodide with bulky aryllithiums (TbLi and TipLi), with the corresponding pentacarbonylmetal(0)-tetrahydrofuran complexes of group 6 metals (W and Cr). Of the two diarylgermylene-group 6 metal complexes (1 and 2), the molecular structure of 1 was determined by X-ray crystallographic analysis. Crystal data with Mo Ka radiation (λ = 0.710 69 A?): 1, C47H82GeO5Si6W, triclinic, space group P1, a = 12.490(2) A?, b = 23.890(3) A?, c = 10.254(1) A?, α = 96.21(1)°, β = 105.52(1)°, γ = 89.82(1)°, V = 2930(1) A?3, Z = 2, R = 0.045, Rw = 0.045 based on 8032 reflections with I > 3σ(I) together with 541 variable parameters.