oxalates and benzil
oxalates has been researched along with benzil* in 2 studies
Other Studies
2 other study(ies) available for oxalates and benzil
| Article | Year |
|---|---|
Synthesis and spectroscopic studies of biologically active compounds derived from oxalyldihydrazide and benzil, and their Cr(III), Fe(III) and Mn(III) complexes.
A new series of complexes have been synthesized by template condensation of oxalyldihydrazide and benzil in methanolic medium in the presence of trivalent chromium, manganese and iron salts forming complexes of the type [M(C(32)H(24)N(8)O(4))X]X(2) where M = Cr(III), Mn(III), Fe(III) and X = Cl(-1), NO(3)(-1), CH(3)COO(-1). The complexes have been characterized with the help of elemental analyses, conductance measurements, magnetic susceptibility measurements, electronic, NMR, infrared and far infrared spectral studies. On the basis of these studies, a five coordinate square pyramidal geometry has been proposed for all these complexes. The biological activities of the metal complexes have been tested in vitro against a number of pathogenic bacteria to assess their inhibiting potential. Some of these complexes have been found to exhibit remarkable antibacterial activities. Topics: Anti-Bacterial Agents; Bacteria; Chromium; Electric Conductivity; Electrons; Iron; Magnetic Resonance Spectroscopy; Magnetics; Manganese; Organometallic Compounds; Oxalates; Phenylglyoxal; Spectrophotometry, Infrared | 2009 |
Excited carbonyl formation in the combination and disproportionation of free radicals.
The pyrolyisis of di-tert-butyl peroxyoxalate in the presence of para-substituted benzaldehydes produces almost quantitatively the corresponding p,p'-disubstituted benzils. The formation of these products is accompanied by chemiluminescence arising from excited triplets. From the quantum yield of excited triplet generation and the rate constants for the triplet photocleavage it is possible to obtain the change in Gibbs free energy associated with triplet formation. The values obtained are -5.6, -5.7 and -8.1 kcal/mol for benzil, p,p'-dimethylbenzil and p,p'-dimethoxybenzil, respectively. The pyrolysis of di-tert-butyl peroxyoxalate in the presence of isopropanol or benzoin leads to the formation of acetone and benzil. These products are generated in disproportionation processes involving the alpha-hydroxy radical produced by hydrogen abstraction. The luminescence observed in these reactions constitutes the first experimental indication of excited species generation in the disproportionation of uncorrelated free radicals. Topics: 1-Propanol; Acetone; Benzaldehydes; Benzoin; Free Radicals; Luminescent Measurements; Oxalates; Phenylglyoxal; Photochemistry | 1992 |