29135-65-7Relevant academic research and scientific papers
125Te-NMR-SPEKTREN VON ORGANOTELLURHALOGENIDEN
Schumann, H.,Magerstaedt, M.
, p. 147 - 150 (1982)
Tetraorganotin compounds react with tellurium tetrachloride or tellurium tetrabromide with formation of the corresponding organotellurium trihalides and diorganotellurium dihalides. 125Te NMR spectra of the reaction mixtures are used to determine the reac
Synthesis and Reactivity of Selones and Dihaloselones: Complexation of Selones with d8- and d10-Metal Ions
Yadav, Sangeeta,Singh, Harkesh B.,Butcher, Ray J.
, p. 2968 - 2979 (2017/06/28)
The reactivities of the monodentate selone LSe (L = 1,3-dibutylbenzimidazol-2-ylidene; 10a), the bidentate pyridine-functionalized selone L′Se (L′ = 1-pyridyl-3-butylimidazol-2-ylidene; 10b) and the multidentate ether-functionalized selone L′′Se {L′′ = 1,3-bis[2-(2-methoxyethoxy)ethyl]benzimidazol-2-ylidene; 10c} with soft transition-metal halides (PdX2, PtX2, ZnX2, CdX2 and HgX2; X = Cl, Br, I) are probed. Compounds 10a and 10c react with metal halides to give complexes of the type [Cu2(μ-X)2(LSe)2] (X = Br, I; 11, 12), [MX2(LSe)2] (13–22) or [M2X2(μ-X)2(L′′Se)2] (X = Cl, Br, I; 26–32), whereas 10b and HgX2 (X = Cl, Br, I) form 1:1 complexes HgX2(L′Se) (21–23), in which the pyridine moiety coordinates to the metal centre to form a six-membered chelate. The reactivity of 10a was compared with those of triphenylphosphine and triethylamine. The reaction of 10c with molecular iodine yields the diiodoselone L′′SeI2 (35), which disproportionates to give the selone adduct of the iodonium ion, [(L′′Se)2I]+I3– (36). The reactions of LSeX2 [X = Cl (34a), Br (34b), I (34c)] with organotellurium compounds, namely, tellone LTe (10d) and diphenyl telluride (37), afford the dihalotellones LTeX2 [X = Cl (38a), Br (38b), I (38c)] and Ph2TeX2 [X = Cl (39a), Br (39b), I (39c)], respectively. The oxidizing properties of LSeX2 (34a–34c) were investigated with rare-earth metals.
Tellurium tetrachloride: an improved method of preparation
Petragnani, Nicola,Mendes, Samuel R.,Silveira, Claudio C.
, p. 2371 - 2372 (2008/09/18)
An efficient and practical synthesis of tellurium tetrachloride from elemental tellurium and sulfuryl chloride is described.
Debrominations of vic-Dibromides with Diorganotellurides. 1. Stereoselectivity, Relative Rates, and Mechanistic Implications
Butcher, Timothy S.,Zhou, Feng,Detty, Michael R.
, p. 169 - 176 (2007/10/03)
Debrominations of vic-dibromides with diaryl tellurides 1-4 and di-n-hexyl telluride (9) are described. A mechanistic explanation of the debromination is offered which accounts for several key experimental observations: (1) the reaction is highly stereoselective with erythro-dibromides giving trans-olefins and threo-dibromides giving cis-olefins, (2) the reaction is accelerated by more electron-rich diorganotellurides, (3) the reaction is accelerated in a more polar solvent, (4) the reaction is accelerated by the addition of carbocation-stabilizing substituents to the carbons bearing the bromo substituents, and (5) erythro-dibromides are much more reactive than threo-dibromides. It is proposed that bromonium ion formation from the vic-dibromide is slow and rate-determining. Bromonium ion formation is followed by rapid scavenging of "Br-" by the diorganotelluride. The bromonium ion formation provides stereoselectivity and eclipsing interactions lower the reactivity of threo-dibromides. No intermediate species were observed by 1H NMR.
Preparation and characterization of a series of bromodiphenyl(N,N-dialkyldithiocarbamato)tellurium(IV) compounds where R = Me, Et, i-Pr, Bu, and of chlorodiphenyl(N,N-dibutyldithiocarbamato)telluriumm(IV) and diphenylbis(N,N-dibutyldithiocarbamato)tellurium(IV). Crystal structure of P...
Bailey, Jane H. E.,Drake, John E.,Wong, Maria L. Y.
, p. 1948 - 1956 (2007/10/02)
The series Ph2TeBr, where R = Bu, Pr, i-Pr, Et, and Me, as well as Ph2TeCl and Ph2Te2, where R = Bu, Pr, have been synthesized and characterized by elemental analysis and vibrational spectroscopy.Comparisons of the effect of changing R groups and halogen atoms can be made based on the two crystal structures determined herein along with earlier work.The geometry about tellurium is consistent with that of a distorted sawhorse structure where the dithiocarbamate groups are monodentate (or anisobidentate).The crystal structures of Ph2TeBr, 4, and Ph2Te2, 7, were completed.The cell parameters for 4 are a = 11.204(3) Angstroem, b = 14.106(11) Angstroem, c = 13.867(10) Angstroem, α = 99.62(6) deg, β = 102.76(5) deg, γ = 87.73(4) deg, V = 2107 Angstroem3, Z = 4, R = 0.0448, and Rw = 0.0489 and for 7 are a = 19.392(6) Angstroem, b = 9.622(2) Angstroem, c = 19.089(6) Angstroem, β = 104.70(2) deg, V = 3445(2) Angstroem3, Z = 4, R = 0.0397, and Rw = 0.0439.Nuclear magnetic resonance spectra are not simple and indicate that several species are present in solution, as rearrangements and reductive elimination take place. Key words: structure, tellurium, bromo, diphenyl, dialkyldithiocarbamato.
SYNTHESIS AND STRUCTURE OF AROMATIC AND HETEROCYCLIC COMPOUNDS OF TELLURIUM. XXII. A NEW METHOD FOR THE SYNTHESIS OF DIARYLTELLURIUM DICHLORIDES
Sadekov, I. D.,Maksimenko, A. A.,Rivkin, B. B.
, p. 541 - 546 (2007/10/02)
A new universal method was developed for the production of unsymmetrical and symmetrical diaryltellurium dichlorides and dibromides on the basis of the reaction of diaryl ditellurides with arenediazonium ions in the presence of copper(II) halides.
Reactions of Diaryltellurides with Some Organic Halides and Sn(IV) Tetraiodide: Electrophilic Cleavage of Te-Allyl Bond
Srivastava, T. N.,Srivastava, R. C.,Singh, Mala
, p. 435 - 437 (2007/10/02)
Diaryltellurides, RTeR' (R = R' = C6H5 or p-CH3OC6H4; and R = C6H5, R' = p-CH3OC6H4) react with allyl bromide, cyclohexyl iodide, CH3I, C6H5X (X = Br, I) or SnI4 to give corresponding triorganotelluronium halides.The Te-allyl bond is readily cleved by electrophiles as Br2, I2, ICl, BrCN, ICN.
