一氧化環八硫

一氧化環八硫
別名	一氧化八硫
識別
CAS號	35788-51-3
SMILES	S1SSSSSSS1=O;
性質
化學式	S8O
摩爾質量	272.52 g·mol⁻¹
外觀	黃色針狀晶體
密度	2.13 g·cm−3
溶解性	0.8 g（二硫化碳）
	若非註明，所有數據均出自標準狀態（25 ℃，100 kPa）下。

一氧化環八硫是一種無機化合物，化學式為S₈O，為硫氧化物的一種，最初於1972年被發現。^[1]

製備

S₈O可由「粗硫烷」（H₂S_6.2）和氯化亞碸於−40 °C在二硫化碳-甲醚中反應得到。^[1]

它也可以由過氧三氟乙酸和硫在無水條件下二硫化碳中反應製備：^[3]

CF₃COOOH + S₈ → CF₃COOH + S₈O

結構及性質

S₈O是正交晶系的晶體，空間群Pca21，晶胞參數a=13.197, b=7.973, c=8.096 Å，其分子對稱性接近C_s。^[2]^[4]

S₈O和五氯化銻在二硫化碳中於20 °C反應，可以得到S₈O·SbCl₅。^[5]它也可以參與一些有機反應，^[6]如和烯烴反應得到環狀的三硫化物。^[7]^[8]

它和氫碘酸發生如下反應：^[1]

S₈O + 2HI → S₈ + I₂ + H₂O

它遇熱可以分解為其它硫的氧化物，如二氧化硫、一氧化二硫等。

參考文獻

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Ralf Steudel, Michael Rebsch. Preparation of cyclo-Octasulfur Oxide, S₈O. Angewandte Chemie International Edition in English. 1972-04, 11 (4): 302–303 [2019-11-01]. ISSN 0570-0833. doi:10.1002/anie.197203021 （英語）.
^ ^2.0 ^2.1 Steudel, Ralf; Luger, Peter; Bradaczek, Hans; Rebsch, Michael. Sulfur-oxygen compounds. 20. Crystal and molecular structure of cyclooctasulfur oxide [S₈O]（德文）. Angewandte Chemie, 1973. 85 (10): 452-453.
^ Ralf Steudel, Torsten Sandow, C. Lau, T. Chivers. 38. Cyclo -Octasulfur Monoxide. John Wiley & Sons, Inc. 2007-01-05: 172–174 [2019-11-01]. ISBN 9780470132524. doi:10.1002/9780470132524.ch38.
^ Luger, Peter; Bradaczek, Hans; Steudel, Ralf; Rebsch, Michael. Sulfur oxygen compounds, 27. X-ray structure of cyclooctasulfur oxide（德文）. Chemische Berichte, 1976. 109 (1): 180-184.
^ Ralf Steudel, Torsten Sandow, Jürgen Steidel. Reversible isomerization of cyclo-octasulphur monoxide; preparation and X-ray crystal structure of S 8 O·SbCl 5. J. Chem. Soc., Chem. Commun. 1980, (4): 180–181 [2019-11-01]. ISSN 0022-4936. doi:10.1039/C39800000180 （英語）.
^ Akihiko Ishii, Manami Suzuki, Remi Yamashita. Preparation of a new 1,2,3-trithiolane, trans-9,10,11-trithiabicyclo[6.3.0]undecane, and its oxidation reactions. Tetrahedron. 2006-06, 62 (23): 5441–5447 [2019-11-01]. doi:10.1016/j.tet.2006.03.044. （原始內容存檔於2020-02-07）（英語）.
^ Akihiko Ishii, Manami Suzuki, Taeko Sone, Norio Nakata. Oxidation and Reduction Reactions of cis -9,10,11-Trithiabicyclo[6.3.0]undecane Synthesized by Reaction of cis -Cyclooctene with S 8 O. Phosphorus, Sulfur, and Silicon and the Related Elements. 2009-05-14, 184 (5): 1184–1205 [2019-11-01]. ISSN 1042-6507. doi:10.1080/10426500902855232 （英語）.
^ Akihiko Ishii, Sohei Asami, Yoko Fujiwara, Aya Ono, Norio Nakata. Syntheses, structures, and complexation of cis- and trans-cycloheptane-1,2-diyl-fused crown thioethers ([12]ansS₄). Heteroatom Chemistry. 2011, 22 (3-4): 388–396 [2019-11-01]. doi:10.1002/hc.20695 （英語）.

[Ralf_Steudel-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 Ralf Steudel, Michael Rebsch. Preparation of cyclo-Octasulfur Oxide, S₈O. Angewandte Chemie International Edition in English. 1972-04, 11 (4): 302–303 [2019-11-01]. ISSN 0570-0833. doi:10.1002/anie.197203021 （英語）.

[Steudel-2] 2.0 ^2.1 Steudel, Ralf; Luger, Peter; Bradaczek, Hans; Rebsch, Michael. Sulfur-oxygen compounds. 20. Crystal and molecular structure of cyclooctasulfur oxide [S₈O]（德文）. Angewandte Chemie, 1973. 85 (10): 452-453.

[3] Ralf Steudel, Torsten Sandow, C. Lau, T. Chivers. 38. Cyclo -Octasulfur Monoxide. John Wiley & Sons, Inc. 2007-01-05: 172–174 [2019-11-01]. ISBN 9780470132524. doi:10.1002/9780470132524.ch38.

[4] Luger, Peter; Bradaczek, Hans; Steudel, Ralf; Rebsch, Michael. Sulfur oxygen compounds, 27. X-ray structure of cyclooctasulfur oxide（德文）. Chemische Berichte, 1976. 109 (1): 180-184.

[5] Ralf Steudel, Torsten Sandow, Jürgen Steidel. Reversible isomerization of cyclo-octasulphur monoxide; preparation and X-ray crystal structure of S 8 O·SbCl 5. J. Chem. Soc., Chem. Commun. 1980, (4): 180–181 [2019-11-01]. ISSN 0022-4936. doi:10.1039/C39800000180 （英語）.

[6] Akihiko Ishii, Manami Suzuki, Remi Yamashita. Preparation of a new 1,2,3-trithiolane, trans-9,10,11-trithiabicyclo[6.3.0]undecane, and its oxidation reactions. Tetrahedron. 2006-06, 62 (23): 5441–5447 [2019-11-01]. doi:10.1016/j.tet.2006.03.044. （原始內容存檔於2020-02-07）（英語）.

[7] Akihiko Ishii, Manami Suzuki, Taeko Sone, Norio Nakata. Oxidation and Reduction Reactions of cis -9,10,11-Trithiabicyclo[6.3.0]undecane Synthesized by Reaction of cis -Cyclooctene with S 8 O. Phosphorus, Sulfur, and Silicon and the Related Elements. 2009-05-14, 184 (5): 1184–1205 [2019-11-01]. ISSN 1042-6507. doi:10.1080/10426500902855232 （英語）.

[8] Akihiko Ishii, Sohei Asami, Yoko Fujiwara, Aya Ono, Norio Nakata. Syntheses, structures, and complexation of cis- and trans-cycloheptane-1,2-diyl-fused crown thioethers ([12]ansS₄). Heteroatom Chemistry. 2011, 22 (3-4): 388–396 [2019-11-01]. doi:10.1002/hc.20695 （英語）.

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