[1271-54-1]  · C12H12Cr  · Dibenzenechromium  · (MW 208.22)

(dehydrogenation catalyst1)

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.

Dehydrogenation Catalyst.

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.

1. Fochi, G. OM 1988, 7, 2255.

James W. Herndon

University of Maryland, College Park, MD, USA

Copyright 1995-2000 by John Wiley & Sons, Ltd. All rights reserved.