For faster navigation, this Iframe is preloading the Wikiwand page for
二氟化二氮.
二氟化二氮(化学式:N2F2)是氮的氟化物之一,室温下为无色气体,存在顺式与反式两种异构体。
二氟化二氮可由叠氮化钠与氟气作用得到。叠氮化氟热分解,产生二氟化二氮和氮气:[3]
- 2 NaN3 +3 F2 =3 N2F2 +2 Na
也可由二氟胺与氟化钾加合物的热分解得到:[3]
-
以上方法得到的是顺、反式二氟化二氮的混合物。用五氟化砷选择性地与顺式加合,经NaF-HF处理,可以获得比较纯的顺式-N2F2。通过N2F3+Sb2F11−与二茂铁反应,[4] 或用四氟肼与氯化铝在低温下作用,都只得到反式异构体。
无色气体。100°C分解。顺式与反式异构体形成平衡,25°C时顺式占90%。[3]
顺式中N=N距离为120.9pm,N-F为140.9pm;反式中N=N键长稍长,为122.4pm,N-F键则稍短,为139.8pm。顺式异构体中两个氟原子不在同一平面内,这可能是由于空间位阻和电子互斥所引起的。[5]
异构化的反应热为12.6kJ/mol。顺式在热力学上较稳定[來源請求],但在动力学上活泼,可在两周内与玻璃完全反应,形成四氟化硅和一氧化二氮,而反式经过一个月仍无明显变化。N2F2可与路易斯酸反应生成含有N2F+的盐。
{{bottomLinkPreText}}
{{bottomLinkText}}
This page is based on a Wikipedia article written by
contributors (read/edit).
Text is available under the
CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.
{{current.index+1}} of {{items.length}}
Thanks for reporting this video!
This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:
An extension you use may be preventing Wikiwand articles from loading properly.
If you're using HTTPS Everywhere or you're unable to access any article on Wikiwand, please consider switching to HTTPS (https://www.wikiwand.com).
An extension you use may be preventing Wikiwand articles from loading properly.
If you are using an Ad-Blocker, it might have mistakenly blocked our content.
You will need to temporarily disable your Ad-blocker to view this page.
✕
This article was just edited, click to reload
Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}
Follow Us
Don't forget to rate us
Oh no, there's been an error
Please help us solve this error by emailing us at
support@wikiwand.com
Let us know what you've done that caused this error, what browser you're using, and whether you have any special extensions/add-ons installed.
Thank you!