[1271-54-1] · C12H12Cr · Dibenzenechromium · (MW 208.22)
Alternate Name: bis(h6-benzene)chromium.
Physical Data: mp 284-285 °C.
Solubility: sol benzene; slightly sol ether.
Form Supplied in: brown-black crystals.
Purification: sublimed at 160 °C in vacuo.
Handling, Storage, and Precautions: air sensitive.
Treatment of dibenzenechromium with potassium produces the corresponding radical anion (eq 1), which is an effective catalyst for the conversion of 1,4-cyclohexadiene to benzene (eq 2).1 The scope and limitations of the process have not been tested.
James W. Herndon
University of Maryland, College Park, MD, USA