Sodium telluride
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Other names
Disodium telluride; hydrotelluric acid, sodium salt
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Identifiers | |
3D model (
JSmol ) |
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ECHA InfoCard
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100.031.629 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
Na2Te | |
Molar mass | 173.58 g/mol |
Appearance | white powder, hygroscopic
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Density | 2.90 g/cm3, solid |
Melting point | 953 °C (1,747 °F; 1,226 K) |
very soluble | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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In contact with water releases flammable gas |
GHS labelling:[1] | |
Warning | |
H261, H302+H312+H332, H315, H319 | |
P261, P264, P270, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P330, P335+P334, P362, P370+P378, P402+P404, P501 | |
NFPA 704 (fire diamond) | |
Related compounds | |
Other anions
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Sodium oxide Sodium sulfide Sodium selenide Sodium polonide |
Other cations
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Hydrogen telluride Lithium telluride Potassium telluride Rubidium telluride Caesium telluride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Sodium telluride is the
Synthesis, structure, and solution properties
The synthesis is typically conducted using ammonia as the solvent.[2]
Na2Te, like many related compounds with the formula M2X, adopts the antifluorite structure. Thus, in solid Na2Te each Te2− ion is surrounded by eight Na+ ions and each Na+ ion is surrounded by four Te2− ions.[3]
Simple salts of the type M2X, where X is a monatomic anion, are not typically soluble in any solvent because they have a high lattice energy. Upon addition of water - even moist air - or treatment with alcohols, Te2− protonates:
- Na2Te + H2O → NaHTe + NaOH
Because of this reaction, many processes attributed to Na2Te may involve NaHTe (
Applications in organic chemistry
Na2Te finds use in
- Na2Te + 2 C10H7I → (C10H7)2Te + 2 NaI
Na2Te reacts with 1,3-diynes to give the corresponding tellurophene, which are structurally analogous to thiophenes:
- Na2Te + RC≡C-C≡CR + 2 H2O → TeC4R2H2 + 2 NaOH
As a reducing agent, Na2Te converts nitro groups to amines and will cleave certain C-X bonds.[4]
References
- ^ "12034-41-2 - Sodium telluride, 99.9% (metals basis) - 41777 - Alfa Aesar". www.alfa.com.
- ^ F. Fehér (1963). "Sodium Telluride, Potassium Telluride Na2Te, K2Te". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 1. NY, NY: Academic Press. p. 441.
- ISBN 0-19-855370-6.
- ^ .