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Revision as of 23:53, 11 July 2011 editCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (changes to watched fields - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref', 'ChEMBL_Ref', 'KEGG_Ref') per Chem/Drugbox validation (report [[Wikipe← Previous edit		Latest revision as of 14:50, 13 October 2024 edit undoKupirijo (talk | contribs)Extended confirmed users9,129 edits removed tellurane because it refers to a different compound
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	{{chembox		{{chembox
	| Watchedfields = changed		| Verifiedfields = changed
			| Watchedfields = changed
	| verifiedrevid = 414825269		| verifiedrevid = 438998048
⚫	| Name = Hydrogen telluride
	| ImageFileL1 = Hydrogen-telluride-2D-dimensions.png		| Name = Hydrogen telluride
		⚫	| ImageFile = Hydrogen telluride.png
	| ImageSizeL1 = 130px
			| ImageSize = 125
⚫	| ImageNameL1 = Structural diagram of the hydrogen telluride molecule
	| ImageFileR1 = Hydrogen-telluride-3D-vdW.png		| ImageCaption = Liquid hydrogen telluride in a test tube
			| ImageFile1 = Hydrogen-telluride-2D-dimensions.svg
	| ImageSizeR1 = 120px
	| ImageNameR1 = Space-filling model of the hydrogen telluride molecule		| ImageName1 = Structural diagram of the hydrogen telluride molecule
	| IUPACName = hydrogen telluride		| ImageFile2 = Hydrogen-telluride-3D-vdW.svg
		⚫	| ImageName2 = Space-filling model of the hydrogen telluride molecule
⚫	| OtherNames = hydrotelluric acid<br />tellane<br />tellurium hydride
			| ImageSize2 = 115
⚫	| Section1 = {{Chembox Identifiers
			| ImageCaption2 = {{legend|rgb(256,128,0)|Tellurium, Te}}{{legend|white|Hydrogen, H}}
⚫	| CASNo = 7783-09-7
			| IUPACName = hydrogen telluride
⚫	| PubChem = 21765
		⚫	| OtherNames = hydrotelluric acid<br />tellane<br />tellurium hydride<br />dihydrogen telluride
⚫	| RTECS =
		⚫	| Section1 = {{Chembox Identifiers
			| CASNo_Ref = {{cascite|correct|??}}
		⚫	| CASNo = 7783-09-7
			| UNII_Ref = {{fdacite|changed|FDA}}
			| UNII = 7F4735942K
		⚫	| PubChem = 21765
			| EINECS = 236-813-4
			| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
			| ChemSpiderID = 20455
			| SMILES =
			| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
			| StdInChI = 1S/H2Te/h1H2
			| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
			| StdInChIKey = VTLHPSMQDDEFRU-UHFFFAOYSA-N
			| ChEBI_Ref = {{ebicite|changed|EBI}}
			| ChEBI = 30452
		⚫	| RTECS =
	}}		}}
	| Section2 = {{Chembox Properties		| Section2 = {{Chembox Properties
	| Formula = H<sub>2</sub>Te		| Formula = H<sub>2</sub>Te
	| MolarMass = 129.6158 g mol<sup>−1</sup>		| MolarMass = 129.6158 g mol<sup>−1</sup>
	| Appearance = colourless gas		| Appearance = colourless gas
			| Odor = Pungent, resembles rotting garlic or leeks
	| Density = 3.310 g/cm<sup>3</sup>, gas <br> 2.57 g/cm<sup>3</sup> (-20 °C, liquid)		| Density = 3.310 g/L, gas <br> 2.57 g/cm<sup>3</sup> (−20 °C, liquid)
	| Solubility = 0.70 g/100 mL		| Solubility = 0.70 g/100 mL
⚫	| MeltingPt = −49 °C <ref>{{RubberBible87th}}</ref>
			| MeltingPtC = −49
⚫	| BoilingPt = −2.2 °C (unstable above -2 °C)
		⚫	| MeltingPt_ref = <ref>{{RubberBible87th}}</ref>
⚫	| pKa = 2.6
			| BoilingPtC = −2.2
		⚫	| BoilingPt_notes = (unstable above −2 °C)
			| ConjugateAcid = Telluronium
			| ConjugateBase = ]
		⚫	| pKa = 2.6
	}}		}}
	| Section4 = {{Chembox Thermochemistry		| Section4 = {{Chembox Thermochemistry
	| DeltaHf = 0.7684 kJ/g		| DeltaHf = 0.7684 kJ/g
	| DeltaHc =		| DeltaHc =
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	| HeatCapacity =		| HeatCapacity =
	}}		}}
	| Section3 = {{Chembox Structure		| Section3 = {{Chembox Structure
	| MolShape = bent		| MolShape = bent
	| Dipole =		| Dipole =
	}}		}}
	| Section7 = {{Chembox Hazards		| Section7 = {{Chembox Hazards
	| ExternalMSDS =		| ExternalSDS =
	| MainHazards = toxic		| MainHazards = Highly toxic and flammable
	| FlashPt =		| FlashPt =
	| RPhrases =		| NFPA-H = 4
	| SPhrases =		| NFPA-F = 4
			| NFPA-R = 1
	}}		}}
	| Section8 = {{Chembox Related		| Section8 = {{Chembox Related
	| OtherAnions = ]<br />]<br />]<br />]		| OtherAnions = ]<br />]<br />]<br />]
	| OtherCations = ]<br />]		| OtherCations = ]<br />]<br />]<br />]<br />]
	| OtherCpds = ] <br> ]		| OtherCompounds = ] <br> ] <br> ]
	}}		}}
	}}		}}
	'''Hydrogen telluride''' is the ] with the formula ]<sub>2</sub>]. The simplest hydride of ], it is rarely encountered because of it decomposes rapidly to the constituent elements. Most compounds with Te-H bonds (]s) are unstable with respect to loss of H<sub>2</sub>. H<sub>2</sub>Te is chemically and structurally similar to ], both are acidic. The H-Te-H angle is about 90°. Volatile tellurium compounds often have unpleasant odours, reminiscent of decayed leeks or garlic.<ref name=Greenwood>Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.</ref>		'''Hydrogen telluride''' is the ] with the formula ]<sub>2</sub>]. A ] and the simplest hydride of ], it is a colorless gas. Although unstable in ambient air, the gas can exist long enough to be readily detected by the odour of rotting garlic at extremely low concentrations; or by the revolting odour of rotting ] at somewhat higher concentrations. Most compounds with Te–H bonds (]s) are unstable with respect to loss of H<sub>2</sub>. H<sub>2</sub>Te is chemically and structurally similar to ], both are acidic. The H–Te–H angle is about 90°. Volatile tellurium compounds often have unpleasant odours, reminiscent of decayed leeks or garlic.<ref name=Greenwood>Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. {{ISBN|0-7506-3365-4}}.</ref>
	==Synthesis==		==Synthesis==
			Electrolytic methods have been developed.<ref name=Brauer>F. Fehér, "Hydrogen Telluride" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. pp. 438.</ref>
	H<sub>2</sub>Te is prepared by the acidification of salts of Te<sup>2−</sup>, such as Al<sub>2</sub>Te<sub>3</sub> and Na<sub>2</sub>Te.<ref name="petragnani">{{cite book
			H<sub>2</sub>Te can also be prepared by hydrolysis of the telluride derivatives of electropositive metals.<ref>Shriver, Atkins. Inorganic Chemistry, Fifth Edition. W. H. Freeman and Company, New York, 2010; pp 407.</ref> The typical hydrolysis is that of ]:
			:Al<sub>2</sub>Te<sub>3</sub> + 6 H<sub>2</sub>O → 2 Al(OH)<sub>3</sub> + 3 H<sub>2</sub>Te
			Other salts of Te<sup>2−</sup> such as MgTe and ] can also be used. Na<sub>2</sub>Te can be made by the reaction of Na and Te in anhydrous ].<ref name="petragnani">{{cite book
	| title = Tellurium in organic synthesis		| title = Tellurium in organic synthesis
	| series = Best synthetic methods		| series = Best synthetic methods
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	| publisher = Academic Press		| publisher = Academic Press
	| year = 2007		| year = 2007
	| isbn = 0080453104		| isbn = 978-0-08-045310-1
	| page = 6		| page = 6
	}}</ref> Na<sub>2</sub>Te can be generated by the reaction of Na and Te in anhydrous ]. The intermediate in the acidification, {{chem|HTe|-}} is a stable anion. Sodium hydrogen telluride, NaHTe, can be made by reducing tellurium with ].<ref name="petragnani"/>		}}</ref> The intermediate in the hydrolysis, {{chem|HTe|-}}, can be isolated as salts as well. NaHTe can be made by reducing tellurium with ].<ref name="petragnani"/>
			Hydrogen telluride cannot be efficiently prepared from its constituent elements, in contrast to H<sub>2</sub>Se.<ref name=Brauer/>
	==Properties==		==Properties==
	{{chem|H|2|Te}} is an ] compound, unstable in air and easily oxidised to water and elemental tellurium:<ref name="wiberg2001">{{cite book		{{chem|H|2|Te}} is an ] compound, degrading to the elements at room temperature:
			: {{chem|H|2|Te}} → {{chem|H|2}} + Te
			Light accelerates the decomposition. It is unstable in air, being oxidized to water and elemental tellurium:<ref name="wiberg2001">{{cite book
	| title = Inorganic chemistry		| title = Inorganic chemistry
	| author = Egon Wiberg		| author = Egon Wiberg
	| author2 = Arnold Frederick Holleman		| author2 = Arnold Frederick Holleman
	| editor = Nils Wiberg		| editor = Nils Wiberg
	| other = translated by Mary Eagleson		| translator = Mary Eagleson
	| publisher = Academic Press		| publisher = Academic Press
	| year = 2001		| year = 2001
	| isbn = 0123526515		| isbn = 0-12-352651-5
	| page = 589		| page = 589
	}}</ref>		}}</ref>
	:2 {{chem|H|2|Te}} + {{chem|O|2}} → 2 {{chem|H|2|O}} + 2 Te		:2 {{chem|H|2|Te}} + {{chem|O|2}} → 2 {{chem|H|2|O}} + 2 Te
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	{{Hydrogen compounds}}		{{Hydrogen compounds}}
			{{Hydrides by group}}
			{{Tellurides}}
	{{DEFAULTSORT:Hydrogen Telluride}}		{{DEFAULTSORT:Hydrogen Telluride}}
	]		]
			]
	]		]
	]
	]
	]
	]
	]
	]
	]
	]
	]
	]
	]