The charge transfer complexes (CTC) formed from N-substituted phenothiazines with 2,3-dichloro-5,6-dicyanobenzoquione (DDQ ) in 1,2-dichloroethane were studied spectrophotometrically. The CT spectra, ionization potent...The charge transfer complexes (CTC) formed from N-substituted phenothiazines with 2,3-dichloro-5,6-dicyanobenzoquione (DDQ ) in 1,2-dichloroethane were studied spectrophotometrically. The CT spectra, ionization potentials of donor and the thermodynamic data (K, △H，△S) of CTC were determined. The results show that the charge donation of N-substituted phenothiazines is fairly strong and depends on the polarity of the substituent.展开更多
We have reported the synthesis of compounds mentioned in this paper and the characterization of their structure and properties withspectra7]. In this Work, we made a quantum chemistry calculation of Cu(En)2DDQ2, Cu(Ph...We have reported the synthesis of compounds mentioned in this paper and the characterization of their structure and properties withspectra7]. In this Work, we made a quantum chemistry calculation of Cu(En)2DDQ2, Cu(Phen)2DDQ2 and three analogous compoundsof Zn2+ coordinated with Phen, Bipy, and En ligands in octahedral model; discussed the feature of their chemical bonds. The resultObtained shows that DDQ radical anion is a considerable electron acceptor. It also would be helpful to understand the characteristics ofIR, ESR spectra of bile compounds and their conductivity discovered in solid state or solution.展开更多
14-Noreudesma-4,11-dien-3,9-diones′ analogues were treated with DDQ in dioxane and afforded the rearranged aromatic products. The similar compounds to eudesma-4,11-dien-3,9-diones had no reaction. 9-Actoxy-14-noreude...14-Noreudesma-4,11-dien-3,9-diones′ analogues were treated with DDQ in dioxane and afforded the rearranged aromatic products. The similar compounds to eudesma-4,11-dien-3,9-diones had no reaction. 9-Actoxy-14-noreudesma-4,11-dien-3-ones, 9-actoxy-eudesma-4,11-dien-3-ones and their analogues yielded the normal 1,2-dehydro-products. The mechanism of the rearrangement was discussed.展开更多
文摘The charge transfer complexes (CTC) formed from N-substituted phenothiazines with 2,3-dichloro-5,6-dicyanobenzoquione (DDQ ) in 1,2-dichloroethane were studied spectrophotometrically. The CT spectra, ionization potentials of donor and the thermodynamic data (K, △H，△S) of CTC were determined. The results show that the charge donation of N-substituted phenothiazines is fairly strong and depends on the polarity of the substituent.
文摘We have reported the synthesis of compounds mentioned in this paper and the characterization of their structure and properties withspectra7]. In this Work, we made a quantum chemistry calculation of Cu(En)2DDQ2, Cu(Phen)2DDQ2 and three analogous compoundsof Zn2+ coordinated with Phen, Bipy, and En ligands in octahedral model; discussed the feature of their chemical bonds. The resultObtained shows that DDQ radical anion is a considerable electron acceptor. It also would be helpful to understand the characteristics ofIR, ESR spectra of bile compounds and their conductivity discovered in solid state or solution.
文摘14-Noreudesma-4,11-dien-3,9-diones′ analogues were treated with DDQ in dioxane and afforded the rearranged aromatic products. The similar compounds to eudesma-4,11-dien-3,9-diones had no reaction. 9-Actoxy-14-noreudesma-4,11-dien-3-ones, 9-actoxy-eudesma-4,11-dien-3-ones and their analogues yielded the normal 1,2-dehydro-products. The mechanism of the rearrangement was discussed.
