Chemical consequences of intramolecular Te ← N coordination in tellurium-containing aromatic azomethine derivatives

Five-, six- and eight-membered tellurium-containing heterocycles with vicinal Te, O and Te, N heteroatoms

“…By bubbling ammonia through benzene solutions of the tellurium dibromides 22 isotellurazoles 2a,b were obtained in about 70% yields. In accordance with these findings 23 , the following mechanism has been suggested for this reaction. An analogous route has been previously used for the synthesis of isoselenazoles 24 .…”

“…24, in good yields 22 . N-Arylisotellurazolium perchlorates 25 22 and their benzoderivatives 25 (R 1 +R 2 = (CH=CH) 2 ) 23,25 were prepared in high yields by treating solutions of β-bromotellurenylvinylaldimines 26 (X = Br) 22 and 2-chlorotellurenylbenzaldimines 26 (26, R 1 + R 2 = (CH=CH) 2 , X = Cl) 25 with silver perchlorate in acetone or dimethylformamide. …”

Polyazide Chemistry: Preparation and Characterization of Te(N3)4 and [P(C6H5)4]2[Te(N3)6] and Evidence for [N(CH3)4][Te(N3)5]

“…It is, therefore, not surprising that polyazides are highly endothermic compounds, and that their energy content increases with an increasing number of azido ligands. Compared to the relatively stable azide anion, which possesses two double bonds, the bonds in covalent azides are polarized towards a single and a triple bond, which greatly facilitates N 2 elimination and enhances their shock sensitivity.Consequently, the synthesis and characterization of covalent binary azides containing multiple azido ligands can present great experimental challenges, and binary tellurium azides are no exception to this general rule.Whereas numerous, partially azide-substituted tellurium compounds have been reported, [1][2][3][4][5][6][7][8][9][10][11][12][13][14] only one binary tellurium azide, the [Te(N 3 ) 3 ] + ion, has previously been reported. [5] In this paper, we wish to communicate the synthesis and characterization of three novel binary tellurium azides, In the presence of catalytic amounts of CsF, the reaction of TeF 6 with excess (CH 3 ) 3 SiN 3 in acetonitrile solution at room temperature results in the reduction of Te VI to Te IV , while the azide ion is oxidized to dinitrogen.…”

“…Whereas numerous, partially azide-substituted tellurium compounds have been reported, [1][2][3][4][5][6][7][8][9][10][11][12][13][14] only one binary tellurium azide, the [Te(N 3 ) 3 ] + ion, has previously been reported. [5] In this paper, we wish to communicate the synthesis and characterization of three novel binary tellurium azides, In the presence of catalytic amounts of CsF, the reaction of TeF 6 with excess (CH 3 ) 3 SiN 3 in acetonitrile solution at room temperature results in the reduction of Te VI to Te IV , while the azide ion is oxidized to dinitrogen.…”

Synthesis, characterization, and computational study of some new organotellurium compounds containing azomethine groups

“…Sadekov et al [4][5][6][7][8] made considerable contributions to the chemistry of tellurated azomethines, and several tellurated Schiff bases were prepared and characterized [4][5][6][7][8]. The ability of β-bromotellurenylvinylaldehydes [8][9][10][11] and monohalotellurobenzaldehydes [12] to form Schiff bases enabled this methodology to synthesize a wide range of organotellurium compounds containing CH N groups [12].…”