The reaction kinetics of hydrolysis resolution of racemic epichlorohydrin to chiral chloropropandiol and optically active epichlorohydrin, catalyzed by chiral salen metal complexes, was studied by using gas chromatography. The effects of temperature, catalyst type and catalyst concentration on the reaction rate were explored. On the experimental results, some kinetic regularity for the reaction has been obtained.
The binding conformations of bidentate ligand DABCO(1,4-diazobicyclo [2,2,2]octane) to a series of p'p type zinc porphyrin dimers covalently linked with flexible alkoxy chain - O(CH2)(n)O- (n=2-10) are described by H-1 NMR and UV-vis spectroscopy. DABCO can bind inside the cavities of porphyrin dimers and form a ternary sandwich complex as the alkoxy chain length is long enough. The thermodynamic parameters which control the binding behavior are investigated.
Qi Zhi RENZhi Ang ZHUJin Wang HUANGLiang Nian JIYong Ti CHEN
The thermodynamic properties were studied for the axial coordination reaction（1）of 2,9,16,23-tetracarboxyphthalocynineiron（Ⅲ）with imidazole in dimethylsulfoxide（DMSO）[Fe（Ⅲ）Pc（COOH）4OH]+nL=[Fe（Ⅲ）Pc（COOH）4Ln]++OH （1）The equilibrium constant（K） and coordination number of reaction（1） were measured by spectrophotometry.The standard molar enthalpy(△rH○—m)and standard entropy(△rS○—m)of the reaction（1）were calculated.
