Three complexes of tetrachlorophenylporphyrinatomanganese acetates have been synthesized and characterized by IR and UV spectra. The asymmetric epoxdation of styrene has been investigated by using these three complexe...Three complexes of tetrachlorophenylporphyrinatomanganese acetates have been synthesized and characterized by IR and UV spectra. The asymmetric epoxdation of styrene has been investigated by using these three complexes as catalysts, chiral quaternary ammonium salts as phase transfer catalysts, and quinine as chiral auxiliary, sodium hypochlorite as oxidant. The results showed that the structure of manganese porphyrins, the chiral auxiliaries and temperature of reaction affected the asymmetric induction. The best enantiomer excess reached 12 8%.展开更多
The fourier transform infrared photoacoustic spectra ofmeso-tetra-(4-lauroyloxyphenyl)porphyrin(TLPPH2) and its complexes with Mn (Ⅲ)、Fe (Ⅲ)、Co (Ⅱ)、 Ni (Ⅱ)、Cu (Ⅱ) and Zn (Ⅱ) in the range of 3600～190 cm-1 we...The fourier transform infrared photoacoustic spectra ofmeso-tetra-(4-lauroyloxyphenyl)porphyrin(TLPPH2) and its complexes with Mn (Ⅲ)、Fe (Ⅲ)、Co (Ⅱ)、 Ni (Ⅱ)、Cu (Ⅱ) and Zn (Ⅱ) in the range of 3600～190 cm-1 were measured and investigated. The bands at 3318 and 968 cm-1 of TLPPH2 are due to the N—H stretching and in-plane and out of plane bending vibration of the pyrrole groups. All these bands disappear upon complex formation. The vibration coupling between the M—N stretching and the porphyrin ring deformation appears at 250 cm-1. Metal sensitive bands were found at 1354、1018、983、796、736、632、231 cm-1.展开更多
文摘Three complexes of tetrachlorophenylporphyrinatomanganese acetates have been synthesized and characterized by IR and UV spectra. The asymmetric epoxdation of styrene has been investigated by using these three complexes as catalysts, chiral quaternary ammonium salts as phase transfer catalysts, and quinine as chiral auxiliary, sodium hypochlorite as oxidant. The results showed that the structure of manganese porphyrins, the chiral auxiliaries and temperature of reaction affected the asymmetric induction. The best enantiomer excess reached 12 8%.
文摘The fourier transform infrared photoacoustic spectra ofmeso-tetra-(4-lauroyloxyphenyl)porphyrin(TLPPH2) and its complexes with Mn (Ⅲ)、Fe (Ⅲ)、Co (Ⅱ)、 Ni (Ⅱ)、Cu (Ⅱ) and Zn (Ⅱ) in the range of 3600～190 cm-1 were measured and investigated. The bands at 3318 and 968 cm-1 of TLPPH2 are due to the N—H stretching and in-plane and out of plane bending vibration of the pyrrole groups. All these bands disappear upon complex formation. The vibration coupling between the M—N stretching and the porphyrin ring deformation appears at 250 cm-1. Metal sensitive bands were found at 1354、1018、983、796、736、632、231 cm-1.
