e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Organometallics
Thermally Stable Chromium (III) η 3-Allyl Complexes. Direct Structural Comparison of Neutral Chromium (II) and Cationic Chromium (III) η 3-Allyl Redox Isomers
DW Norman, R McDonald, JM Stryker
Index: Cardaci, Giuseppe Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999), 1984 , p. 815 - 818