1 Supporting Information Spectroscopic Characterization of a phenolate bound Fe II -O 2 Adduct: Gauging the relative “push” effect of a phenolate axial ligand Pradip Kumar Das, Kaustuv Mittra, Abhishek Dey * Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata, India 700032 Email: icad@iacs.res.in Electronic Supplementary Material (ESI) for Chemical Communications This journal is © The Royal Society of Chemistry 2013