Chns o analyzer 2400ii

Elemental analysis was performed on a Perkin-Elmer CHNS/O Analyzer 2400II (Perkin-Elmer, Waltham, MA, USA). IR spectra were recorded on a FT/IR 4200 spectrometer (JASCO, Tokyo, Japan) for solid samples (as KBr pellets). NMR spectra were recorded on a ECA-600 spectrometer (JEOL, Tokyo, Japan). Magnetic susceptibilities of the cobalt(II) complexes were determined by the Evans method using the ¹H-NMR spectra of the CDCl₃ solutions (measured at ambient temperature). UV-vis spectra were measured on a V650 spectrometer (JASCO, Tokyo, Japan). Cyclic voltammetry was performed on a Model 600C Electrochemical Analyzer (ALS, Tokyo, Japan). Gas chromatography (GC) analysis was performed on a GC2010 gas chromatograph (Shimadzu, Kyoto, Japan) equipped with an Rtx-5 column (length = 30 m, i.d. = 0.25 mm, thickness = 0.25 μm, Restek, Bellefonte, PA, USA).
NaTo^M [14 ] and L^Ph [16 (link)] were prepared according to the literature. All manipulations were performed under argon by standard Schlenk techniques. THF, toluene, CH₂Cl₂, and MeCN were purified over a Glass Contour Solvent Dispensing System under Ar atmosphere. meta-Chloroperbenzoic acid (mCPBA) was washed with KH₂PO₄-NaOH buffer solution (pH 7.4) and pure water to remove meta-chlorobenzoic acid. Other reagents of the highest grade commercially available were used without further purification.