Iron (low valent)
Recent Literature

Fe(0) is cost-effective, environmentally friendly alternative to Cr(II) for
the olefination of carbonyls by activated polyhalides. Fe(0) proved
compatible with a wide range of functionality, such as unprotected phenol,
aryl nitro, carboxylic acid, and alkyl nitrile.
J. R. Falck, R. Bejot, D. K. Barma, A. Bandyopadhyay, S. Joseph, C. Mioskowski, J. Org. Chem., 2006, 71, 8178-8182.

An iron complex containing electronically coupled acidic and hydridic hydrogens
catalyzes the hydrogenation of ketones under mild conditions and shows high
chemoselectivity for aldehydes, ketones, and imines. Isolated carbon double and
triple bonds, aryl halides, nitrates, epoxides, and ester functions are
unaffected by the hydrogenation conditions.
C. P. Casey, H. Guan, J. Am. Chem. Soc., 2007,
129, 5816-5817.
