Va. Milukov et al., FIRST OPTICALLY-ACTIVE ORGANOMETALLIC FREE-RADICAL IN THE CYMANTRENE SERIES, Journal of organometallic chemistry, 493(1-2), 1995, pp. 221-222
Replacement of one CO ligand in the enantiomeric 2-methylcymantrenecar
boxylic acid ester for a radical ligand PhS results in the preparation
of stable and optically active odd-electron complex CH3C5H3COOCH3Mn(C
O)(2)SPh] fully characterized by electron spin resonance, mass spectro
scopy, UV-visible spectroscopy, IR spectroscopy and circular dichroism
spectroscopy. This is the first example of an optically active organo
metallic free radical.