(η ⁶ ‐Benzene)tricarbonylchromium

<jats:title>Abstract</jats:title> <jats:p> <jats:chem-struct-wrap> <jats:chem-struct> <jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" position="anchor" xlink:href="urn:x-wiley:9780470842898:media:rb025:nrb025sf.001"> <jats:alt-text>Chemical structure of benzene chromium tricarbonyl. A chromium atom is centrally bonded to a benzene ring and 3 carbonyl groups.</jats:alt-text> </jats:graphic> </jats:chem-struct> </jats:chem-struct-wrap> <jats:table-wrap position="anchor"> <jats:table frame="hsides"> <jats:col/> <jats:col/> <jats:col/> <jats:tbody> <jats:tr> <jats:td> <jats:italic>[</jats:italic> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="cas-registration-number" xlink:href="12082-08-5"> <jats:italic>12082‐08‐5</jats:italic> </jats:ext-link> <jats:italic>]</jats:italic> </jats:td> <jats:td> C <jats:sub>9</jats:sub> H <jats:sub>6</jats:sub> CrO <jats:sub>3</jats:sub> </jats:td> <jats:td>(MW 214.14)</jats:td> </jats:tr> </jats:tbody> </jats:table> </jats:table-wrap> </jats:p> <jats:p> InChI =  <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="inchi" xlink:href="InChI=1S/C6.3CH3O.Cr/c1-2-4-6-5-3-1;3*1-2;/h;3*2H,1H2;">1S/C6.3CH3O.Cr/c1-2-4-6-5-3-1;3*1-2;/h;3*2H,1H2;</jats:ext-link> </jats:p> <jats:p> InChIKey =  <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="inchi" xlink:href="InChIKey=UMBATYYGSRZAHS-UHFFFAOYSA-N">UMBATYYGSRZAHS‐UHFFFAOYSA‐N</jats:ext-link> </jats:p> <jats:p> (phenyl cation equivalent <jats:sup> <jats:bold>1</jats:bold> </jats:sup> ) </jats:p> <jats:p> <jats:list list-type="simple"> <jats:list-item> <jats:p> <jats:italic>Alternate Name:</jats:italic>  (benzene)chromium tricarbonyl. </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:italic>Physical Data:</jats:italic>  mp 161.5–163 °C. </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:italic>Solubility:</jats:italic>  sol THF, ether, benzene. </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:italic>Form Supplied in:</jats:italic>  yellow crystals. </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:italic>Preparative Method:</jats:italic>  when large amounts are needed, the reagent is easily prepared by treatment of benzene with <jats:bold> <jats:italic>Hexacarbonylchromium</jats:italic> </jats:bold> in a mixture of di‐ <jats:italic>n</jats:italic> ‐butylether and THF at reflux for 40 h. <jats:sup> <jats:bold>2a</jats:bold> </jats:sup> For smaller amounts, it can be prepared more quickly (1 h) under microwave irradiation. <jats:sup> <jats:bold>2b</jats:bold> </jats:sup> </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:italic>Purification:</jats:italic>  recrystallized from ether/petroleum ether. Can also be purified by column chromatography on silica gel. </jats:p> </jats:list-item> <jats:list-item> <jats:p> <jats:italic>Handling, Storage, and Precautions:</jats:italic>  slightly air sensitive. </jats:p> </jats:list-item> </jats:list> </jats:p>