Gr. Knox et al., FERROCENE DERIVATIVES .2. THE METALATION OF PHENYLAZOFERROCENE AND THE SYNTHESIS OF PHENYLAZOCYCLOPENTADIENYL DERIVATIVES OF OTHER METALS, Journal of organometallic chemistry, 450(1-2), 1993, pp. 177-184
Phenylazoferrocene undergoes nickelation and palladation exclusively o
n the phenyl group. Lithium phenylazocyclopentadienide has been conver
ted into derivatives of Mo, Mn, Fe, Ru and Rh.