Synthesis, spectral and X-ray structural characterization of [cis-MoO_2(L)(solv)] (L = salicylidene salicyloyl hydrazine) and its use as catalytic oxidant

摘要

The synthesis and characterization of cis-[MoO_2(L) (solv)] [L = salicylidene salicyloyl hydrazine and solvent=H_2O/MeOH) is described. The tridentate Schiff base ligand was obtained by the condensation of salicylaldehyde and salicylic acid hydrazide in 1:1 ratio. The dioxomolybdenum complex was isolated from 1:1 reaction mixture containing the Schiff base ligand and MoO_2(acac)_2. The orange colored, non-electrolytic and diamagnetic compound was characterized by elemental analyses. spectroscopic techniques (IR, ~1H NMR and UV-Vis), and cyclic voltammetry. The molecular structure was determined using crystals obtained from methanol, confirmed the formula cis-MoO_2(L)(CH_3OH) with triclinic p-1 space group. The Mo is coordinated by two cis terminal Os. ONO from the ligand and O of methanol. The oxo-transfer reaction from cis-[MoO_2(L)(solv)] to PPh_3, is reported.