Fig. 3
From: Nucleophilic reactivity of a copper(II)-hydroperoxo complex
Characterization of complex 1. a UV-vis spectrum of 1 in CH3OH at –50 °C. Inset shows the rRaman spectra of 1 (16 mM) prepared with H216O2 (red line), H218O2 (blue line), and the difference spectrum (black line), which were obtained upon excitation at 405 nm in CH3OH at –30 °C. b CSI-MS for 1-16O2H (red line) and 1-18O2H (blue line) in CH3OH at –40 °C, and for 1-O22H (green line) prepared with 2H2O2 in CH3O2H at –40 °C. Asterisk is assigned to thermally decomposed species of 1. c X-band EPR spectrum of 1 in frozen CH3OH at 113 K. Spectroscopic settings: frequency = 9.155 GHz, microwave power = 0.998 mW, modulation frequency = 100 kHz, and modulation amplitude = 0.6 mT
