Syntheses, spectroscopy, cyclic voltammetry, thermal analyses, EPR, and DFT/TDDFT on bis[N-2-(R-pyridyl)salicylaldiminato-κ2NˆO]copper(II) (R = H, 4/6-CH3)

Sulfonated salicylidene thiadiazole complexes with Co (II) and Ni (II) ions as sustainable corrosion inhibitors and catalysts for cross coupling reaction

“…An observable decomposed successive step from 100 to 130 °C from Ni‐Sanp mass was detected with Δ m rel = 1.6%, which are acceptable with the calculated mass loss (Δm rel = 1.4%). Particularly, Co‐Sanp has a remarkable mass loss of two water molecules in the range from 170 to 230 °C in the thermogram 5.8% (Figure S11), which assigned for the two coordinated water molecules in Co‐Sanp and agreed with the calculated mass loss (5.5%) . Considerably, Co‐Sanp has an octahedral geometry, which coordinated to H 2 Sanp within four‐coordination bonding and completed within two labile coordinated water molecules (Scheme ).…”

“…Electronic spectrum of H 2 Sanp and its corresponding pincer complexes (Ni‐Sanp and Co‐Sanp) deduces the characteristic absorption wavelength, λ max (nm) and the derived molar absorptivity values, ε (mol −1 cm −1 ) in and water, as depicted in Figure and reported in Table . The UV‐spectra for H 2 Sanp assigned three bands at 226, 250 and 301 nm are attributable for to the intra ligand spin‐allowed transitions π → π*, π → π* and n → π*, respectively . An additional band in the Visible‐zone appeared at 338 nm, which is due to ligand charge transfer.…”