Carbonyl fluoride

<h2 id="preparation-and-properties">Preparation and properties</h2>
<p>Carbonyl fluoride is usually produced as a decomposition product of fluorinated hydrocarbons in the thermal decomposition thereof, for example from <a href="/facts/Trifluoromethanol/nzeFteSX">trifluoromethanol</a> or <a href="/facts/Tetrafluoromethane/gEGAWJnz">tetrafluoromethane</a> in the presence of water:
</p>
CF4 + H2O → COF2 + 2 HF
<p>Carbonyl fluoride can also be prepared by reaction of phosgene with <a href="/facts/Hydrogen_fluoride/XfQxlqR6">hydrogen fluoride</a> and the fluorination of <a href="/facts/Carbon_monoxide/CKuLtEMJ">carbon monoxide</a>, although the latter tends to result in over-fluorination to <a href="/facts/Carbon_tetrafluoride/gEGAWJnz">carbon tetrafluoride</a>. The fluorination of carbon monoxide with <a href="/facts/Silver_difluoride/IsmKS4gQ">silver difluoride</a> is convenient:
</p>
CO + 2 AgF2 → COF2 + 2 AgF
<p>Carbonyl fluoride is unstable in the presence of water, hydrolyzing to carbon dioxide and <a href="/facts/Hydrogen_fluoride/XfQxlqR6">hydrogen fluoride</a>:<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a>
</p>
COF2 + H2O → CO2 + 2 HF
<h2 id="safety">Safety</h2>
<p>Carbonyl fluoride is very toxic with a <a href="/facts/Recommended_exposure_limit/nexWYeNv">recommended exposure limit</a> of 2 <a href="/facts/Parts-per_notation/PozRuoLM">ppm</a> as an 8-hour time weighted average and a 5 ppm as a short-term (15-minute average) exposure, where 1 ppm = 2.70 mg of carbonyl fluoride per 1 m3 of air.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a>
</p>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Greenwood, Norman  N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 304–305. ISBN 978-0-08-037941-8. <a href="978-0-08-037941-8" target="_blank">978-0-08-037941-8</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>M. W. Farlow; E. H. Man; C. W. Tullock (1960). "Carbonyl Fluoride". Inorganic Syntheses. Inorganic Syntheses. Vol. 6. pp. 155–158. doi:10.1002/9780470132371.ch48. ISBN 9780470132371. {{cite book}}: ISBN / Date incompatibility (help) <a href="9780470132371" target="_blank">9780470132371</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"Carbonyl Fluoride". NIOSH Pocket Guide to Chemical Hazards. CDC Centers for Disease Control and Prevention. Retrieved 2013-09-10. <a href="https://www.cdc.gov/niosh/npg/npgd0108.html" target="_blank">https://www.cdc.gov/niosh/npg/npgd0108.html</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
</ol>

Carbonyl fluoride open-in-new

Carbonyl fluoride