Organochromium chemistry

Zeiss et al. repeated Hein's experiments and correctly arrived at a cationic bisarene chromium sandwich compound (ArH2Cr+).

[11][12] Chromocene compounds were first employed in ethylene polymerization in 1972 by Union Carbide[13] and continue to be used today in the industrial production of high-density polyethylene.

[15] The first example of a proposed metal-metal quintuple bond is found in a compound of the type [CrAr]2, where Ar is a bulky aryl ligand.

Although organochromium chemistry is heavily employed in industrial catalysis, relatively few reagents have been developed for applications in organic synthesis.

[19] The Phillips catalyst is prepared by impregnating chromium(VI) oxide on silica followed activation in dry air at high temperatures.