Tellurium azides

Several explosive species in which three or more azido groups are bonded to tellurium have been well characterized.59 The salt [Te(N3)3][SbF6] is formed from the reaction of Te4[SbF6]2 with potassium azide in liquid sulfur dioxide. The neutral binary tellurium azide Te(N3)4 is prepared by the reaction of TeF4 (in CFC13)60 or TeF6 (in CH3CN)61 with trimethylsilyl azide. 

Ag Fulminate 5) Lead Azide 6) Cuprous Azide 7) Cuprous Fulminate 8) Mercurous Azide 9) Mercuric Fulminate 10) Tellurium Azide 11) Tellurium Fulminate... 

Diphenyl tellurium azide iodide and diphenyl tellurium cyanate iodide reacted with silver thiocyanate in chloroform with exchange of iodide for thiocyanate4. 

In group 16, the intermediate existence of 0(N3)2 as an intermediate in the reaction of OF2 with CSN3 has been proposed. Many sulfur azides are known, for details see (see Sulfur Inorganic Chemistry). Binary selenium and tellurium azides are not known, but several organic derivatives of the azides have been synthesized. For a description of the halogen azides, see Section 8.6. 

Nitrogen and sodium do not react at any temperature under ordinary circumstances, but are reported to form the nitride or azide under the influence of an electric discharge (14,35). Sodium siHcide, NaSi, has been synthesized from the elements (36,37). When heated together, sodium and phosphoms form sodium phosphide, but in the presence of air with ignition sodium phosphate is formed. Sulfur, selenium, and tellurium form the sulfide, selenide, and teUuride, respectively. In vapor phase, sodium forms haHdes with all halogens (14). At room temperature, chlorine and bromine react rapidly with thin films of sodium (38), whereas fluorine and sodium ignite. Molten sodium ignites in chlorine and bums to sodium chloride (see Sodium COMPOUNDS, SODIUM HALIDES). 

The reaction of Te(N3)4 with ionic azides generates the [Te(N3)6] anion (Eq. 5.8). The stmeture of this anion is strongly distorted from octahedral by the stereochemically active lone pair on the tellurium atom, which gives rise to substantial differences in the Te-N bond lengths. Eour of these bonds are in the range 2.09-2.24 A, cf. [Te(N3)5] ,... 

Sodium hydrogen telluride, (NaTeH), prepared in situ from the reaction of tellurium powder with an aqueous ethanol solution of sodium borohydride, is an effective reducing reagent for many functionalities, such as azide, sulfoxide, disulfide, activated C=C bonds, nitroxide, and so forth. Water is a convenient solvent for these transformations.28 A variety of functional groups including aldehydes, ketones, olefins, nitroxides, and azides are also reduced by sodium hypophosphite buffer solution.29... 

Organotellurium(IV) azides with two or three azido groups attached to tellurium, R2Te(N3)2 (R=alkyl, Ph, C6F5) and RTe(N3)3 (R=alkyl, 2,4,6-Me3C6H2), are prepared by the reaction of organotellurium(IV) fluorides with trimethylsilyl azide.188... 

Silver is a white, ductile metal occurring naturally in its pure form and in ores (USEPA 1980). Silver has the highest electrical and thermal conductivity of all metals. Some silver compounds are extremely photosensitive and are stable in air and water, except for tarnishing readily when exposed to sulfur compounds (Heyl et al. 1973). Metallic silver is insoluble in water, but many silver salts, such as silver nitrate, are soluble in water to more than 1220 g/L (Table 7.3). In natural environments, silver occurs primarily in the form of the sulfide or is intimately associated with other metal sulfides, especially fhose of lead, copper, iron, and gold, which are all essentially insoluble (USEPA 1980 USPHS 1990). Silver readily forms compounds with antimony, arsenic, selenium, and tellurium (Smith and Carson 1977). Silver has two stable isotopes ( ° Ag and ° Ag) and 20 radioisotopes none of the radioisotopes of silver occurs naturally, and the radioisotope with the longest physical half-life (253 days) is "° Ag. Several compounds of silver are potential explosion hazards silver oxalate decomposes explosively when heated silver acetylide (Ag2C2) is sensitive to detonation on contact and silver azide (AgN3) detonates spontaneously under certain conditions (Smith and Carson 1977). 

The reaction of nitroalkanes and dinitroalkanes with sodium hydrogen telluride gives nitrosoalkane dimers and olefins, respectively.96 The reduction of other nitrogenated species such as hydroxylamines, azides, nitroso, azo, and azoxy compounds can also be performed by using tellurium reagents.6,11,12... 

Diisobutyl tellurium induces the reaction of tosyl azide with aldehydes to form tosylimines. Ketones do not react under these conditions2. 

Diaryl telluriums combined with iodine azide or iodine cyanate in carbon tetrachloride at — 10° to give diaryl tellurium iodide pseudohalides3. 

As novel halides-pseudohalides of a tetravalent chalcogen, tellurium trichloride azide, ClaTeNa, and tellurium dichloride diazide, CI2-Te(Na)2, were prepared from CH2CI2 solutions of TeCU and trimethyl-silyl azide according to... 

Acetylphenyl butyl tellurium is formylated at the acetyl-methyl group by methyl formate and sodium in diethyl ether. The formyl compound is converted to butyl 2-(diazoacetyl)-phenyl tellurium upon treatment with 4-methylbenzenesulfonyl azide The diazoacetyl group is converted to the dibromoacetyl group by bromine in diethyl ether . 

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