Hydrogen telluride

Hydrogen telluride 속성

Hydrogen telluride C화학적 특성, 용도, 생산

개요

Hydrogen telluride has the formula, H2Te. The simplest hydride of Te, it is rarely encountered because of its tendency to decompose to the constituent elements. Most compounds with Te–H bonds are unstable with respect to loss of H2. H2Te is chemically and structurally similar to H2S, and both are acidic species with H–X–H angles approaching 90°.The tellurides of the alkaline earth metals tend to immediately decompose on exposure to air, with liberation of tellurium. H2Te is prepared by the acidification of salts of Te^2-,such as Al2Te3 and Na2Te.
Na2Te can be generated by the reaction of Na and Te in anhydrous ammonia. The intermediate in the acidification, the HTe is a stable anion.
H2Te is an endothermic compound, and is unstable in air, rapidly decomposing into water and elemental tellurium:
2H2Te+ O2 → 2H2O+ 2Te
It is almost as acidic as phosphoric acid (pK_a=8.1×10^-3), having a pK_a value of about 2.3×10^-3. It reacts with many metals to form tellurides. However, many of these are unstable relative to their decomposition to the elements. Its CAS number is 7783-09-7 and its molecular weight is 129.6158 g/mol. It is a colorless gas and is toxic if breathed. Its density is 3.310 g/cm3 and its melting point is –49°C with a boiling point of –2.2°C. Its solubility in water is 0.701 g/100 ml of water at 20°C.

화학적 성질

Colorless gas.Soluble in water but unstable; soluble in alcohol and alkalies.

물리적 성질

Colorless gas; strong garlic-like odor; stable to light when dry but under-goes photochemical decompostion in the presence of moisture and dust; den-sity 5.68 g/L; liquefies to a colorless unstable liquid at -2°C, decomposed bylight; liquid density 2.57 g/mL at -20°C; solidifies at -49°C; soluble in water,alcohol and alkalies; pKa 2.6 (for first dissociation constant at 18°C) and 11.0(the dissociation constant at 25°C) for the second replaceable hydrogen.

용도

It is synthesized by the action of acid on aluminum telluride. It has no industrial uses.

제조 방법

Hydrogen telluride is prepared by the reaction of aluminum telluride,Al₂Te₃ with hydrochloric acid:
Al2Te₃ + 6HCl → 3H₂Te + 2AlCl₃
It also may be prepared by electrolysis of a 50% sulfuric acid solution using atellurium cathode.

위험도

See hydrogen selenide.

Hydrogen telluride 준비 용품 및 원자재

원자재

준비 용품

Hydrogen telluride 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58
Shaanxi Dideu Medichem Co. Ltd	+86-029-89586680 +86-18192503167	1026@dideu.com	China	9271	58
Hu Bei Jiutian Bio-medical Technology CO.,Ltd	027-88013699 17354350817	Ryan@jiutian-bio.com	China	7433	58
Mainchem Co., Ltd.	+86-0592-6210733	sale@mainchem.com	China	32360	55
Shanghai Meishui Chemical Technology Co., Ltd	021-60549325 18616193163		China	4528	56
JinJin Le Chemical Co., Ltd	10106090	jjlchem2@163.com	China	9986	58
Shaanxi DIDU pharmaceutical and Chemical Co., Ltd	17691182729 18161915376	1046@dideu.com	China	10008	58

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