二氟二氧化氙

二氟二氧化氙
识别
CAS号	13875-06-4
PubChem	23236530
ChemSpider	10329748
SMILES	F[Xe](F)(=O)=O;
InChI	1/F2O2Xe/c1-5(2,3)4;
InChIKey	OJNSIFWVGHJJMW-UHFFFAOYAM
性质
化学式	F2O2Xe
摩尔质量	201.289 g·mol⁻¹
外观	无色晶体
熔点	30.8 °C（87.4 °F，304 K）
结构
晶体结构	正交晶系
分子构型	三角双锥
	若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

二氟二氧化氙是氙的氟氧化物之一，化学式 XeO₂F₂^[3]^[2]。室温下的二氟二氧化氙是亚稳定的固体，会缓慢分解成二氟化氙，原因不明。^[2]

二氟二氧化氙是由Huston于1967年首次合成的。^[4]

制备

二氟二氧化氙可以由三氧化氙和四氟一氧化氙反应而成：^[2]

{\ce {XeO3 + XeOF4 -> 2XeO2F2}}

它还可以通过六氟化氙和水或硝酸钠的反应产生。^[5]

它也可以由五氧化二氮和四氟一氧化氙反应而成：^[6]

XeOF₄ + N₂O₅ → XeO₂F₂ + 2 NO₂F

注意这个反应不能加入过多的五氧化二氮，不然会产生更多硝酰氟和极易爆炸的三氧化氙。^[6]

性质

二氟二氧化氙是无色^[1]、正交晶系的晶体，空间群 Cmcm，晶格参数 a = 6.5 Å、b = 6.3 Å和c = 8.3 Å。这个分子是三角双锥形的，两个氟原子在垂直位置上，而氧原子和孤对电子位于水平位置上。它的Xe-O键长为1.714 Å、Xe-F键长1.899 Å、O-Xe-O键角105.7°、O-Xe-F键角91.6°、F-Xe-F键角174.7°。^[7]

反应

二氟二氧化氙在潮湿空气中立即水解为三氧化氙，而且水解过程中还可以嗅出臭氧味。^[4]

它和五氟碲酸硼反应，生成五氟碲氧基取代的化合物：^[8]

3 XeO₂F₂ + 2 B(OTeF₅)₃ → 3 XeO₂(OTeF₅)₂ + 2 BF₃

它也可以和五氟化锑反应生成[XeO₂F]⁺[Sb₂F₁₁]^-，其中含有的[XeO₂F]⁺有三角锥形结构。^[1]二氟二氧化氙还会和氟化铯反应，生成CsXeO₂F₃。^[6]

参考资料

^ ^1.0 ^1.1 ^1.2 Holloway, John H.; Laycock, David. Preparations and Reactions of Inorganic Main-Group Oxide Fluorides. Advances in Inorganic Chemistry. Elsevier. 1983. ISSN 0898-8838. doi:10.1016/s0898-8838(08)60107-5.
^ ^2.0 ^2.1 ^2.2 ^2.3 Claassen, Howard H.; Gasner, Earl L.; Kim, Hyunyong; Huston, J. L. Vibrational Spectra and Structure of XeO 2 F 2. The Journal of Chemical Physics. July 1968, 49 (1): 253–257 [2022-08-15]. ISSN 0021-9606. doi:10.1063/1.1669818. （原始内容存档于2020-12-10）（英语）.
^ ^3.0 ^3.1 ^3.2 Willett, R. D.; LaBonville, P.; Ferraro, J. R. Normal coordinate treatment of XeO 2 F 2. The Journal of Chemical Physics. 1975-08-15, 63 (4): 1474–1478 [2022-08-15]. ISSN 0021-9606. doi:10.1063/1.431510. （原始内容存档于2022-04-02）（英语）.
^ ^4.0 ^4.1 Huston, John L. Xenon dioxide difluoride: isolation and some properties. The Journal of Physical Chemistry (American Chemical Society (ACS)). 1967, 71 (10): 3339–3341. ISSN 0022-3654. doi:10.1021/j100869a035.
^ Schrobilgen, Gary J.; Moran, Matthew D., Noble-Gas Compounds, Hoboken, NJ, USA: John Wiley & Sons, Inc., 2003-04-18, doi:10.1002/0471238961.0315131619030818.a01.pub2
^ ^6.0 ^6.1 ^6.2 Christe, Karl O.; Wilson, William W. New syntheses and properties of XeO2F2, Cs+XeO2F3- and NO2+[XeO2F2.cntdot.nXeO2F2]-. Inorganic Chemistry (American Chemical Society (ACS)). 1988, 27 (21): 3763–3768. ISSN 0020-1669. doi:10.1021/ic00294a019.
^ Peterson, S. W.; Willett, R. D.; Huston, J. L. Symmetry and structure of XeO2F2 by neutron diffraction. The Journal of Chemical Physics (AIP Publishing). 1973, 59 (1): 453–459. ISSN 0021-9606. doi:10.1063/1.1679827.
^ Schumacher, Gerhard A.; Schrobilgen, Gary J. Preparation of O2XeF2-x(OTeF5)x, OXeF4-y(OTeF5)y and XeF4-y(OTeF5)y (x = 0-2, y = 0-4) and study by xenon-129 and fluorine-19 NMR and Raman spectroscopy: the oxygen primary isotopic effect in the xenon-129 NMR spectra of xenon(VI) oxyfluorides (XeO2F2 and XeOF4). Inorganic Chemistry (American Chemical Society (ACS)). 1984, 23 (19): 2923–2929. ISSN 0020-1669. doi:10.1021/ic00187a005.

扩展阅读

无机化学丛书，第一卷

[:0-1] 1.0 ^1.1 ^1.2 Holloway, John H.; Laycock, David. Preparations and Reactions of Inorganic Main-Group Oxide Fluorides. Advances in Inorganic Chemistry. Elsevier. 1983. ISSN 0898-8838. doi:10.1016/s0898-8838(08)60107-5.

[Claassen-2] 2.0 ^2.1 ^2.2 ^2.3 Claassen, Howard H.; Gasner, Earl L.; Kim, Hyunyong; Huston, J. L. Vibrational Spectra and Structure of XeO 2 F 2. The Journal of Chemical Physics. July 1968, 49 (1): 253–257 [2022-08-15]. ISSN 0021-9606. doi:10.1063/1.1669818. （原始内容存档于2020-12-10）（英语）.

[Willett-3] 3.0 ^3.1 ^3.2 Willett, R. D.; LaBonville, P.; Ferraro, J. R. Normal coordinate treatment of XeO 2 F 2. The Journal of Chemical Physics. 1975-08-15, 63 (4): 1474–1478 [2022-08-15]. ISSN 0021-9606. doi:10.1063/1.431510. （原始内容存档于2022-04-02）（英语）.

[:2-4] 4.0 ^4.1 Huston, John L. Xenon dioxide difluoride: isolation and some properties. The Journal of Physical Chemistry (American Chemical Society (ACS)). 1967, 71 (10): 3339–3341. ISSN 0022-3654. doi:10.1021/j100869a035.

[5] Schrobilgen, Gary J.; Moran, Matthew D., Noble-Gas Compounds, Hoboken, NJ, USA: John Wiley & Sons, Inc., 2003-04-18, doi:10.1002/0471238961.0315131619030818.a01.pub2

[:1-6] 6.0 ^6.1 ^6.2 Christe, Karl O.; Wilson, William W. New syntheses and properties of XeO2F2, Cs+XeO2F3- and NO2+[XeO2F2.cntdot.nXeO2F2]-. Inorganic Chemistry (American Chemical Society (ACS)). 1988, 27 (21): 3763–3768. ISSN 0020-1669. doi:10.1021/ic00294a019.

[7] Peterson, S. W.; Willett, R. D.; Huston, J. L. Symmetry and structure of XeO2F2 by neutron diffraction. The Journal of Chemical Physics (AIP Publishing). 1973, 59 (1): 453–459. ISSN 0021-9606. doi:10.1063/1.1679827.

[8] Schumacher, Gerhard A.; Schrobilgen, Gary J. Preparation of O2XeF2-x(OTeF5)x, OXeF4-y(OTeF5)y and XeF4-y(OTeF5)y (x = 0-2, y = 0-4) and study by xenon-129 and fluorine-19 NMR and Raman spectroscopy: the oxygen primary isotopic effect in the xenon-129 NMR spectra of xenon(VI) oxyfluorides (XeO2F2 and XeOF4). Inorganic Chemistry (American Chemical Society (ACS)). 1984, 23 (19): 2923–2929. ISSN 0020-1669. doi:10.1021/ic00187a005.

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