사용자:Ho949494/작업장3

Ho949494/작업장3^[1]
이름
	IUPAC 이름 sulfurothioic O-acid
	별칭 thiosulfuric acid; dihydroxidooxidosulfidosulfur
식별자
CAS 번호	13686-28-7;
PubChem CID	24478;
	InChI InChI=1/H2O3S2/c1-5(2,3)4/h(H2,1,2,3,4);
성질
화학식	H2S2O3
몰 질량	114.14 g/mol
녹는점	decomposes below 0 ºC
물에서의 용해도	decomposes
산성도 (pKa)	0.6, 1.74
	달리 명시된 경우를 제외하면, 표준상태(25 °C [77 °F], 100 kPa)에서 물질의 정보가 제공됨. 정보상자 각주

싸이오황산(구조식:H₂S₂O₃ 은 산의 산소산이다. The acid cannot be made by acidifying thiosulfate salts as the acid readily decomposes in water. The decomposition products can include sulfur, sulfur dioxide, hydrogen sulfide, polysulfanes, sulfuric acid and polythionates, depending on the exact reaction conditions.^[3] Anhydrous methods of producing the acid were developed by Schmidt:^[3]^[4]

H₂S + SO₃ → H₂S₂O₃·nEt₂O (in diethyl ether at −78 °C )

Na₂S₂O₃ + 2HCl → 2NaCl + H₂S₂O₃·2Et₂O (in diethyl ether at −78 °C )

HSO₃Cl + H₂S → HCl + H₂S₂O₃ (low temperature)

The anhydrous acid also decomposes below 0 °C:^[3]

H₂S₂O₃ → H₂S + SO₃

The S-acid isomer is believed to be more stable than the O-acid isomer based on Hartree–Fock/ab initio calculations with a 6-311 G** basis set and MP2 to MP4 refinements.^[5] There is another isomeric form, a white crystalline adduct of hydrogen sulfide and sulfur trioxide, H₂S·SO₃, which can also be prepared at low temperature.^[3]

References[편집]

↑ ^가 ^나 Macintyre, Jane Elizabeth titys, 편집. (1992), 《Dictionary of Inorganic Compounds》, Chapman & Hall, 3362쪽, ISBN 0412301202 .
↑ Page, F. M. (1953), “The dissociation constants of thiosulphuric acid”, 《J. Chem. Soc.》: 1719–24, doi:10.1039/JR9530001719 .
↑ ^가 ^나 ^다 ^라 Greenwood, Norman N.; Earnshaw, Alan (1984). 《Chemistry of the Elements》. Oxford: Pergamon Press. 846–48쪽. ISBN 0-08-022057-6. .
↑ Schmidt, Max (1957), “Über Säuren des Schwefels. I. Zur Kenntnis der wasserfreien Thioschwefelsäure”, 《Z. Anorg. Allg. Chem.》 289: 141–57, doi:10.1002/zaac.19572890113 .
↑ Miaskiewicz, Karol; Steudel, Ralf (1992), “The Structures of Thiosulfuric Acid H₂S₂O₃ and Its Monoanion HS₂O₃⁻”, 《Angew. Chem., Int. Ed. Engl.》 31 (1): 58–59, doi:10.1002/anie.199200581 .

[DIC-1] 가 ^나 Macintyre, Jane Elizabeth titys, 편집. (1992), 《Dictionary of Inorganic Compounds》, Chapman & Hall, 3362쪽, ISBN 0412301202 .

[2] Page, F. M. (1953), “The dissociation constants of thiosulphuric acid”, 《J. Chem. Soc.》: 1719–24, doi:10.1039/JR9530001719 .

[G&E-3] 가 ^나 ^다 ^라 Greenwood, Norman N.; Earnshaw, Alan (1984). 《Chemistry of the Elements》. Oxford: Pergamon Press. 846–48쪽. ISBN 0-08-022057-6. .

[4] Schmidt, Max (1957), “Über Säuren des Schwefels. I. Zur Kenntnis der wasserfreien Thioschwefelsäure”, 《Z. Anorg. Allg. Chem.》 289: 141–57, doi:10.1002/zaac.19572890113 .

[5] Miaskiewicz, Karol; Steudel, Ralf (1992), “The Structures of Thiosulfuric Acid H₂S₂O₃ and Its Monoanion HS₂O₃⁻”, 《Angew. Chem., Int. Ed. Engl.》 31 (1): 58–59, doi:10.1002/anie.199200581 .

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