六氟化锇

六氟化锇
	IUPAC名; osmium(VI) fluoride
别名	osmium hexafluoride
识别
CAS号	13768-60-0
PubChem	123327
SMILES	F[Os](F)(F)(F)(F)F;
InChI	1/6FH.2Os/h6*1H;;/q;;;;;;+6/p-6;
性质
化学式	OsF6
摩尔质量	304.22 g·mol⁻¹
外观	黄色晶状固体
密度	5.09g/mL
熔点	33.4 °C
沸点	47.5 °C
	若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

六氟化锇是锇元素与氟元素形成的一种无机化合物，化学式为OsF₆，它也是已知的17种二元六氟化物之一。

制备

六氟化锇可由金属锇与过量的氟气在300 °C下直接化合制得：^[3]

\mathrm {Os+3\ F_{2}{\xrightarrow {300^{o}C}}OsF_{6}}

性质

六氟化锇是一种黄色晶体，熔点为33.4 °C，沸点为47.5 °C。^[1]在−140 °C是测得它的固态结构为正交晶系晶体，空间群为Pnma。晶胞参数a = 9.387 Å，b = 8.543 Å，而c = 4.944 Å。每个晶胞中有四个化学式单位的六氟化锇（这里是四个六氟化锇分子），密度则是5.09 g·cm⁻³。^[2]

六氟化锇分子本身（气态或液态的主要存在形式）具有八面体空间构型，点群为O_h。其中Os–F键的键长为1.827 Å。^[2]

六氟化锇部分水解生成四氟一氧化锇（OsOF₄）。^[4]

参考文献

^ ^1.0 ^1.1 ^1.2 ^1.3 CRC Handbook of Chemistry and Physics, 90th Edition, CRC Press, Boca Raton, Florida, 2009, ISBN 978-1-4200-9084-0, Section 4, Physical Constants of Inorganic Compounds, p. 4-85.
^ ^2.0 ^2.1 ^2.2 T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: Inorganic Chemistry, 2006, 45 (9), S. 3782–3788; doi:10.1021/ic052029f; PMID 16634614.
^ Weinstock, Bernard; Malm, John G. Journal of the American Chemical Society. 1958-09-05, 80 (17): 4466–4468. doi:10.1021/ja01550a007. 缺少或|title=为空 (帮助)
^ Paine, R. T. Partial hydrolysis of rhenium and osmium hexafluorides. An improved synthesis and characterization of rhenium oxide tetrafluoride. Inorganic Chemistry. 1973-06-01, 12 (6): 1457–1458. doi:10.1021/ic50124a060.

扩展阅读

Gmelins Handbuch der anorganischen Chemie, System Nr. 53, Osmium, Supplement Volume 1, pp. 111–114.

外部链接

Osmium hexafluoride at webelements.com （页面存档备份，存于互联网档案馆）.

[CRC_HANDBOOK_OsF6-1] 1.0 ^1.1 ^1.2 ^1.3 CRC Handbook of Chemistry and Physics, 90th Edition, CRC Press, Boca Raton, Florida, 2009, ISBN 978-1-4200-9084-0, Section 4, Physical Constants of Inorganic Compounds, p. 4-85.

[D_BLOCK_XF6-2] 2.0 ^2.1 ^2.2 T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: Inorganic Chemistry, 2006, 45 (9), S. 3782–3788; doi:10.1021/ic052029f; PMID 16634614.

[3] Weinstock, Bernard; Malm, John G. Journal of the American Chemical Society. 1958-09-05, 80 (17): 4466–4468. doi:10.1021/ja01550a007. 缺少或|title=为空 (帮助)

[4] Paine, R. T. Partial hydrolysis of rhenium and osmium hexafluorides. An improved synthesis and characterization of rhenium oxide tetrafluoride. Inorganic Chemistry. 1973-06-01, 12 (6): 1457–1458. doi:10.1021/ic50124a060.

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