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Dual-parameter Correlation Analysis of the Redox Potential Data of 1-Methyl-2-formyl-5-substituted Pyrroles and their Hydrazones

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Chinese Chemical Letters 2001年第12期12卷 1097-1100页

作者： Hai Ying HE Chen Lin Cheng Xue ZHAO xi kui jiang Department of Chemistry Shanghai Jiaotong UniversityShanghai 200240 Shanghai Institute of Organic Chemistry Shanghai 200032

By using 1-methyl-2-formyl-5-substituted pyrroles (1-Y), 1-methyl-2-formyl-5-substituted pyrrole phenylhydrazones (2-Y) and 1-methyl-2-formyl-5-substituted pyrrole (4-nitrophenyl)-hydrazones (3-Y) as model structures for nitrogen-containing heterocyclic aromatic compounds, correlation analysis of their redox potential data show that the transition states (TS) of the polarographic process are mainly affected by the polar effects, but spin-delocalizatin effects also exist.

关键词： correlation analysis polar effect spin-delocalization effect redox potential

HOW DO THE RATES OF HALOPHILIC ATTACKS COMPARE WITH THE RATES OF PROTOPHILIC ATTACKS?

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Chinese Chemical Letters 1993年第5期4卷 411-414页

作者： xing Ya LI Ming Hu TU xi kui jiang Shanghai Institute of Organic Chemistry Academia Sinica345 Lingling LuShanghai 200032

The measured relative rates of halophilic and protophilic attacks (k_X/k_H) indicate that the rates of halophilic attacks are comparable in magnitude to those of protophilic attacks (deprotonations).

关键词： In HOW DO THE RATES OF HALOPHILIC ATTACKS COMPARE WITH THE RATES OF PROTOPHILIC ATTACKS Li

Dual-parameter Correlation Analysis of the Fluorescence Data of 1-Methyl-2-formyl-5-substituted Pyrrole(4-nitrophenyl)hydrazones

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Chinese Chemical Letters 1999年第6期10卷 499-502页

作者： Roderick Hat Ying HE xi kui jiang(Shanghai Institute of organic Chemistry,354 Feng－Lin Lu．Shanghai 200032) Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

By using 1-methyl-2-formyl-5 -Y-substituted pyrrole (4-nitrophenyl)hydrazones as a model for nitrogen-containing heterocyclic aromatic compounds, the emission wavelength [lambda(max(em))] values df their fluorescence spectra have been measured. Correlation results show that the Delta E-em values are mainly affected by polar effects, but spin-delocalizatin effects also exist.

关键词： fluorescence spectra correlation analysis dual-parameter equation spin-delocalization effect polar effect 1-methyl-2-formyl-5-Y-substituted pyrrole (4-nitrophenyl)hydrazones

THE SPIN DELOCALIZATION SUBSTITUENT PARAMETER σ 10. SYNTHESIS OF SUBSTITUTED α, β, β-TRIFLUOROSTYRENES BY THE Pd-CATALYZED CROSS-COUPLING OF TRIFLUOROVINYLZINC BROMIDE WITH ARYL HALIDES

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Chinese Chemical Letters 1992年第10期3卷 791-794页

作者： Guo Zhen JI Wen Ting SHI Hong Xun GUO xi kui jiang Shanghai Institute of Organic Chemistry 345 Ling-ling Lu Shanghai 200032

Palladium-catalyzed coupling of trifluorovinylzinc reagent with substituted aryl halides Y-C_6H_4-X (Y=p-NO_2, p-and m-COOMe, p-COOH, p-CONH_2, p- and m-CN; X=Br, I, Cl) provides a synthetic method for α, β, β-trif... 详细信息

关键词： CF Ph Pd TRIFLUOROSTYRENES BY THE Pd-CATALYZED CROSS-COUPLING OF TRIFLUOROVINYLZINC BROMIDE WITH ARYL HALIDES SYNTHESIS OF SUBSTITUTED THE SPIN DELOCALIZATION SUBSTITUENT PARAMETER

SPECTROSCOPIC DETERMINATION OF THE AVERAGE NUMBER OF COAGGREGATES (Nco) OF CHOLESTERYL ESTERS AND THE FLUORESCENCE PROBE

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Chinese Chemical Letters 1992年第9期3卷 673-674页

作者： xi kui jiang Jin Tao ZHANG Shanghai Institute of Organic Chemistry,Academia Sinica,345 Ling-ling LU,Shanghai 200032 Zhen He TONG The Laboratory of Photochemistry,Institute of Photographio Chemistry,Academia Sinica,Beijing 100101

Average aggregate number of coaggregates(N_co)of CE-n or BL-n and the fluoresc- ence probe(Np-16)have been determined by using time-resolved fluorescence spectroscopy. Chain-length,hydroxy-group and chain-foldability ... 详细信息

关键词： CE Nco OF CHOLESTERYL ESTERS AND THE FLUORESCENCE PROBE SPECTROSCOPIC DETERMINATION OF THE AVERAGE NUMBER OF COAGGREGATES

IS THE“DEGREE OF AGGREGATION”A FUNCTION OF THE AVERAGE AGGREGATE NUMBER,OR OF THE NUMBER OF AGGREGATES,OR BOTH?

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Chinese Chemical Letters 1992年第9期3卷 675-676页

作者： xi kui jiang Jin Tao ZHANG Shanghai Institute of Organic Chemistry,Academia Sinica,345 Ling-ling LU,Shanghai 200032 Zhen He TONG Laboratory of Photochemistry,Institute of Photographic Chemistry,Academia Sinica,Beijing 100101

Measurement of the average aggregate number of coaggregates(N_co)and evaluation Of the number of coaggregates([CoAg])in the region of increasing degree of aggregation shows that only N_co increases linearly with the c... 详细信息

关键词： Menger A FUNCTION OF THE AVERAGE AGGREGATE NUMBER,OR OF THE NUMBER OF AGGREGATES,OR BOTH DEGREE OF AGGREGATION IS THE Figure OC

^(19)F NMR Study on the Charge-Transfer Process between Ground-State Acceptor Fluoranil (or Pentafluorophenyl Carboxylate) and Some N-Alkylphenothiazine Donors

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Chinese Chemical Letters 1999年第10期10卷 839-842页

作者： Hu Nan YI Ji Liang SHI Zhi Hai QIU Jia Yi XU xi kui jiang(Shanghai Institute of organic Chemistry. Chinese Academy of Sciences. 354Fenglin Lu, Shanghai 200032) Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

The line positions of 19F NMR absorption of fluoranil (TFQ) or pentafluorophenylcarboxylate (PFE-16) in the presence of N-alkylphenothiazine donors have been measured. By comparing the 19F chemical shift in C6D6 of TFQ or PFE-16 in the absence of the donor with thosein the presence of the donor. the difference of these chemical shifts was found to be large. In thepresence of the donor. 19F upheld shifts of TFQ or PFE-16 have been observed. The experimentalresults showed that there is a charge-transfer process between TFQ or PFE-16 and the donor .When TFQ or PFE-16 accepts the charge from the donor. its 19F resonance moves upfield.

关键词： NMR charge-transfer chemical shift.

ELECTROSTATICALLY STABILIZED AGGREGATE (ESAg) Ⅱ.EVIDENCE DERIVED FROM THE COAGGREGATING BEHAVIOR OF A CATIONIC KINETIC PROBE (P16^+) WITH SURFACTANTS

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Chinese Chemical Letters 1992年第3期3卷 231-234页

作者： xi kui jiang~k Guo Zhen JI Jian She WANG Shanghai Institute of Organic Chemistry, Academia Sinica, 345 Ling-Ling Lu, Shanghai 200032

The coaggregating behavior of the cationic kinetic probe P16;with different types of surfactants are in complete agreement with predictions based on the newly proposed ESAg concept.

关键词： Pi ELECTROSTATICALLY STABILIZED AGGREGATE EVIDENCE DERIVED FROM THE COAGGREGATING BEHAVIOR OF A CATIONIC KINETIC PROBE P16 WITH SURFACTANTS

CAN TRICHLOROMETHANE SULFONYL BROMIDE BE USED AS AN ADDENDUM AS WELL AS A TELOGEN IN ITS ADDITION REACTION T0 VINYLIDENE FLUORIDE?

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Chinese Chemical Letters 1993年第7期4卷 583-586页

作者： Michael Yu ZHU Susan Si Xun SUN Yu Buang ZHANG xi kui jiang Shanghai Institute of Organic Chemistry, 345 Ling-Ling Lu, Shanghai 200032

CCl_3SO_2Br used as a 'telogen' reacts with CH_2=CF_2 to give mainly the 'mono- adduct' CCl_3CH_2CF_2Br, together with very small amouats of CCl_3CF_2CH_2Br, CCl_2BrCH_2CF_2Br and the 'di-adduct' CCl_3(CH_2CF_2)_2Br. The result indicates that CCl_3SO_2Br can be used as an addendum in trichloromethyl-bromo-addition reactions to olefins.

关键词： CF Br CCI CAN TRICHLOROMETHANE SULFONYL BROMIDE BE USED AS AN ADDENDUM AS WELL AS A TELOGEN IN ITS ADDITION REACTION T0 VINYLIDENE FLUORIDE CII AS BE ITS