185515-88-2Relevant academic research and scientific papers
Syntheses and reactions of hexavalent organotellurium compounds bearing five or six tellurium-carbon bonds
Miyasato, Masataka,Sagami, Takao,Minoura, Mao,Yamamoto, Yohsuke,Akiba, Kin-Ya
, p. 2590 - 2600 (2007/10/03)
A variety of hexaorganotellurium compounds, Ar6-n(CH 3)nTe [Ar = 4-CF3C6H4, n = 0 (1a), n = 1 (3a), n = 2 (trans-4a and cis-4a), n = 3 (mer-5a), n = 4 (trans-6a); Ph, n = 0 (1b), n = 1 (3b), n = 2 (trans-4b); 4-CH3C 6H4, n = 0 (1c), n = 1 (3c), n = 2 (trans-4c), n = 4 (trans-6c); 4-BrC6H4, n = 0 (1d)] and Ar5(R)Te [Ar = 4-CF3C6H4, R = 4-CH3OC 6H4 (8); Ar = 4-CF3C6H4, R = vinyl (9), Ar = Ph, R = vinyl (10), Ar = 4-CF3C6H 4, R = PhSCH2 (11), Ar = Ph, R = PhSCH2 (12), Ar = 4-CF3C6H4, R = nBu (13)] and pentaorganotellurium halides, Ar5TeX [Ar = 4-CF3C 6H4, X = Cl (2a-Cl), X = Br (2a-Br); Ar = Ph, X = Cl (2b-Cl), X = Br (Zb-Br); Ar = 4-CH3C6H4, X = Cl (2c-Cl), X = Br (2c-Br); Ar = 4-BrC6H4, X = Br (2d-Br)] and (4-CF3C6H4)4(CH3)TeX [X = Cl (trans-7a-Cl) and X = Br (trans-7a-Br)] were synthesized by the following methods: 1) one-pot synthesis of 1a, 2) the reaction of SO 2Cl2 or Br2 with Ar5Te Li + generated from TeCl4 or TeBr4 with five equivalents of ArLi, 3) reductive cleavage of Ar6-m(CH 3)mTe (m = 0 or 2) with KC8 followed by treatment with CH3I, 4) valence expansion reaction from low-valent tellurium compounds by treatment with KC8 followed by reaction with CH3I, 5) nucleophilic substitution of Ar6-y-z(CH 3)zTeXy-z (X=Cl, Br, OTf; z = 0, 1; y= 1, 2) with organolithium reagents. The scope and limitations and some details for each method are discussed and electrophilic halogenation of the hexaorganotellurium compounds is also described.
Synthesis and characterization of hexaaryltellurium (TeAr6); The first neutral hexaarylated element compound
Minoura, Mao,Sagami, Takao,Miyasato, Masataka,Akiba, Kin-Ya
, p. 12195 - 12202 (2007/10/03)
Te(C6H4-CF3)6 1a was obtained by the unique one-pot reaction of LiC6H4-4-CF3 with TeCl4. The Te atom resides in the highest oxidation state (Te(VI)) having six C-Te bonds in 1a. Compound la is extremely thermally stable and not light sensitive unlike tetraorganotellurium compounds. The X-ray crystallographic analysis of 1a revealed a rare example of approximately T(h) molecular symmetry.
TeAr6: Synthese und Struktur der ersten neutralen Hexaarylelementverbindungen
Minoura, Mao,Sagami, Takao,Akiba, Kin-ya,Modrakowski, Claudia,Sudau, Allexander,et al.
, p. 2827 - 2829 (2007/10/03)
Keywords: Hypervalente Verbindungen; Strukturaufklaerung; Tellurverbindungen
