1992 Volume 3 Issue 7

THE FRIEDEL-CRAFTS REACTION OF CALIXARENES
Zhi Tang HUANG , Guo Qiang WANG
1992, 3(7): 485-488
[Abstract](55) [FullText HTML] [PDF 274KB](0)
Abstract:
By optimization of the reaction conditions, the p-acylation of calixarenes by the Friedel-Crafts reaction succeeded in moderate to good yields.
A NOVEL SCISSION OF ALKYL-CARBONYL C-C BOND BY ALKYL p-HYDROXYPHENYL KETONES
Peng GAO , Qun LI , Shi Yu WANG , Pang ZHANG
1992, 3(7): 489-492
[Abstract](52) [FullText HTML] [PDF 132KB](1)
Abstract:
Methyl, ethyl, n-propyl, and benzyl p-hydroxyphenyl ketones and 6-hydroxy-1-tetralone are shown under the condition of ethylene ketal formation to undergo alkyl-carbonyl C-C bondscission, but not with p-hydroxybenzophenone, p-hydroxyisobutyrophenone, and 5-hydroxy-1-indanone. It is suggested that the scissiou is preceded by an aldol condensation.
STUDY ON THE REACTION OF ACYLISOCYANATE AND ARYL UREA
Jian Ping ZOU , Zhong E LU , Ke Qian CHEN
1992, 3(7): 493-494
[Abstract](61) [FullText HTML] [PDF 74KB](0)
Abstract:
Acyl isocyanate(Ⅰ) was synthesized by the reaction of acyl chloride with lead cyanate in dichloromethane, using pyridine as a catalyst. Then, adding aryl urea(Ⅱ) to acyl isocyanate, 1-acyl-5-aryl-biuret (Ⅲ) can be obtained. 14 compounds have been synthesized by this method.
STUDIES ON THE SYNTHESIS OF BAIMUXINOL BY CATALYTIC HYDROGENATION OF DEHYDROBAIMUXINOL
Qian LIU , Ji Yu GUO , Yan Qing XU , Hong Ju FANG , Xiao Tian LIANG
1992, 3(7): 495-498
[Abstract](51) [FullText HTML] [PDF 141KB](0)
Abstract:
Baimuxinol, a 4-hydroxymethyl agarofuran isolated from Aquilaria Sinensis, was synthsizd. The stereoselectivity of catalytic hydrogenation of dehydrobaimuxino and its derivatives was studied.
CATALYSIS OF METALLO-PORPHYRINS IN OXIDATION OF P-NITROTOLUENE BY ELECTRO-GENEEATED SUPEROXIDE ION
Su Fang WANG , Hong Sheng LU , Suo Bo ZHANG , Yin Jie LIN , Ying Kai XU
1992, 3(7): 499-502
[Abstract](64) [FullText HTML] [PDF 159KB](0)
Abstract:
The oxidation of pnitrotoluene with electro-generated superoxide ion in the presence or absence of metallo-porphyrins FeTPP, MnTPP and CoTPP in DMF was studied by cyclic voltammetry and controlled potential electrolysis, Metallo-porphyrins as catalysts for electroreduction of O2, they can not only increase yields of p-nitrobensoic acid and selectivities of reaction but also enable the reaction proceed at lower negative potential.
HYDROXYLATION OF n-HEXANE CATALYZED BY SUPPORTED Mn (Ⅲ)-PORPHYRIN COMPLEXES
Shao Kai JIANG , Xian Yuan WANG , Guang Nian LI
1992, 3(7): 503-506
[Abstract](59) [FullText HTML] [PDF 154KB](0)
Abstract:
Water-soluble Mn (Ⅲ)-porphyrins supported on various carriers as monooxygenase-like catalysts were used for n-Hexane hydroxylation by PhIO. The hydroxylation yields and XPS measurement of the catalysts indicate that the carriers containing-OH groups have favorable steric and electronic effect on Mn-porphyrins. Some influencing factors and the role of carriers are discussed.
STRUCTURE OF MAIN COMPONENT IN PERFUME “ISO-E-SUPER”
You Zhu YUAN , Shu Jing PENG
1992, 3(7): 507-510
[Abstract](68) [FullText HTML] [PDF 171KB](0)
Abstract:
Addition of myrcene and 3-methyl-3-penten-2-one followed by cyclization afforded perfume "Iso-E-Super" with 2-acetyl-2β,3β,8,8-tetramethyl-1,2,3,4,5,6,7,8-octalin as main component on the basis of its spectroscopic data.
STUDIES ON NEW ALKALOIDS OF STEMONA JAPONICA
Yang YE , Ren Sheng XU
1992, 3(7): 511-514
[Abstract](755) [FullText HTML] [PDF 139KB](14)
Abstract:
Four new alkaloids, didehydroprotostemonine, isoprotostemonine, neostemonine and stemodiol, were isolated from the roots of a Chinese medicinal plant, Stemona japonica, collected form Zhejiang Province, southern China. Their structures were elucidated by extensive spectral analyses.
A NEW TRITERPENOID FROM SANGUISORBA ALPINA
Xiang Qian LIU , Zi Min LIU , Zhong Jian JIA , Xiu Wen HAN
1992, 3(7): 515-516
[Abstract](59) [FullText HTML] [PDF 65KB](0)
Abstract:
From the roots of Sanguisorba alpina, a new triterpenoid was isolated and identified as 2-isobutyryloxy-19α, 25-dihydroxyursa-1, 12-dien-28-oic acid by means of spectral methods, named as aipinic acid.
ISOLATION AND IDENTIFICATION OF β-N-OXALO-L-α,β-DIAMINOPROPIONIC ACID AND ITS ISOMER α-N-OXALO-L-α,β-DIAMINOPROPIONIC ACID FROM PANAX SPECIES
Yi Cheng LONG , Fei Ning YE , Yun Hua YE , Qi Yi XING
1992, 3(7): 517-520
[Abstract](56) [FullText HTML] [PDF 134KB](0)
Abstract:
The neuroexcitotoxic nonprotein amino acid β-N-oxalo-L-α, β-diaminopropionic acid (β-N-ODAP) and its isomer α-N-oxalo-L-α, β-diaminopropionic acid (α-N-ODAP) in Panax ginseng C. A. Meyer (cultivated ih Northeastern China), Panax quinquefolius L., Panax notoginseng F.H. Chen (cultivated in Southwestern China), Korean red ginseng and Jilin red ginseng were isolated and identified. Efficient separation and purification methods for β-N-ODAP and α-N-ODAP were developed.
BICYCLOOCTANOID NEOLIGNANS FROM PIPER KADSURA
Gui Qiu HAN , Ping DAI , Li XU , Shu Chung WANG , Qi Tai ZHENG
1992, 3(7): 521-524
[Abstract](55) [FullText HTML] [PDF 113KB](1)
Abstract:
Three new bicyclooctanoid neolignans, kadsurenin A, kadsurenin B and kadsurenin C were isolated from Piper kadsura (Choisy) Ohwi. Based on the spectroscopic analysis (UV, JR, MS, NMR, and X-ray), their structures were established as 7R, 8R, 3'S, 4'R, 5'R-△s'-3,4-methyienedioxy-5'-methoxy-4'-acetyloxy-2',3',4',5'-tetrahydro-2'-oxo-7.3',8.5'-neolignan; 7R, 8R, 3'S, 4'R, 5'R-△s'-3, 4-methylenedioxy-5'-methoxy-4'-hydroxy-2',3',4',5'-tetrahydro-2'-oxo-7.3', 8.5'-neolignan and 7R, 8R, 3'S, 4'R, 5'R-△s'-3,4,5'-trimethoxy-4'-hydroxy-2',3',4',5',-tetrahydro-2'-oxo-7.3',8.5'-neolignan respectively.
IMMOBILIZATION OF AMINOACYLASE FROM ASPERGILLUS ORYZAE ON CHLOROMETHYLATED CROSS-LINKED POLYSTYRENES
Dao Bin WANG , Pins JIANG , Bins Lin HE
1992, 3(7): 525-528
[Abstract](57) [FullText HTML] [PDF 321KB](0)
Abstract:
A number of chlorumethylated polystyrenes were synthesized and tried to immobilize aminoacylase from Aspergillus oryzae and many factors which affected immobilized enzyme activity were studied in detail. The results indicated that the immobilized enzyme on support (IAR-1) possessed high enzymatic activity and high stability.
RATE MEASUREMENTS OF THERMOLYSIS OF O,O-DIETHYL-S-TRIFLUOROMETHYLTHIOLOPHOSPHATE BY 31p-NMR
Wen Xiang HU , Hua Tang XU , Xuan Long XU
1992, 3(7): 529-530
[Abstract](59) [FullText HTML] [PDF 109KB](0)
Abstract:
The thermolysis of (EtO)2P(O)SCF3 was measured by 31P-NMR with external standard method. Kinetic parameters of the reaction, i.e., order, rate constant, pre-exponential, activation energy were obtained. For constant external-standard method, It is better to choose the value of 31P peak area of standard substance slightly greater than the middle value of the area of the measured compounds.
A STUDY OF THE WAVE FUNCTION WITH SYMPLECTIC SYMMETRY
Xiao Qin JIANG , Jin Liang GUO , Chia Chung SUN
1992, 3(7): 531-532
[Abstract](62) [FullText HTML] [PDF 86KB](0)
Abstract:
By using the linear combination of the AGP(antisymmetrtzed geminat power) and SPG(sequential product of geminats) functions, an attempt has been made to catcutate the ground state of the LiH molecule. The calculated results show that-the AGP or SPG function gives the same ground state result as their linear combination.
DETECTION OF INTERMEDIATES IN REACTION BETWEEN N, N'-DI (P-METHYL) PHENYL MONOTHIOXAMIDES AND 1, 3-DIAMINE TRIMETHYLENE USING RAMAN SPECTROSCOPY
Xiao Kun HU , Ren Ao GU , Zhang Fei HE , Ke Qian CHEN , Da Qing SUN
1992, 3(7): 533-534
[Abstract](51) [FullText HTML] [PDF 75KB](0)
Abstract:
Reman spectroscopy is used as a tool to monitor the reaction between N,N'-di (pmethyl) monothioxamides and 1,3-diamine trimethylene and to detect the reaction intermediate. By observing changes of 1024 cm-1 C=S band and appearance of a new bend at around 1720 cm-1, the reaction mechanism is discussed.
A STUDY ON SYNCHRONOUS-HI GH-DERIVATIVE SPECTFLUOR-THE DI FFERENTI ATI ON OF CRUDE OIL AND FUEL OIL POLLUTION
Jian LIU , Zheng XIE , Xiao Hong ZHENG
1992, 3(7): 535-538
[Abstract](51) [FullText HTML] [PDF 151KB](0)
Abstract:
A method of synchronous-high-derivative spectfluor for identification of crude oil and fuel oil pollution is studied. The best operation conditions for the 2nd and 4th deriv, are set. To differentiate oil-spill at river and sea, this method is rapid and simple, and the spectra have high resolution power as "fingerprint".
SURFACE ENHANCED RAMAN SPECTRA OF PHENYLMERCAPTOTETRAZOLE AND MERCAPTOBENZOTHIAZOLE ON SILVER
Chun Yan LIU , Zhen Zong ZHANG , Xin Min REN
1992, 3(7): 539-542
[Abstract](60) [FullText HTML] [PDF 129KB](0)
Abstract:
Normal Raman Spectra(NRS) of solid PMT (1-phenyl-5-mercaptotetrazole) and MBT (2-mercaptobenzothiazole) and their surface enhanced Raman spectra (SERS) adsorbed on the surface of the silver subcolloidal particles are reported and compared.
It is supposed that PMT adsorbed on silver with both N and S atoms whereas MBT may be adsorbed on silver through S atom.
THE CHARACTERIZATION OF SILVER SUBCOLLOID USED IN SURFACE ENHANCED RAMAN SPECTROSCOPY
Chun Yan LIU , Zhen Zong ZHANG , Xin Min REN
1992, 3(7): 543-546
[Abstract](63) [FullText HTML] [PDF 141KB](0)
Abstract:
A clear light-yellow silver sol which has the visible spectral absorption at 390 nm, when adsorbed phenylmercaptotetrazole(PMT) or mercaptobenzothiazole (MBT), has a new absorption at 510-550 nm. It was found that the adsorption of halide ions competes with PMT and MBT. However, halide ions have a completely different influence from PMT and MBT on the spectral absorption of the silver sol. The differences may result from the change of the properties of the surface of the silver subcolloidal particles and from the bond forms combining adsorbates with the substrates.
MODELLING OF MECHANICAL MECHANISM OF CHROMATOGRAPHIC SYSTEM AND THEORETICAL EQUATIONS SHOWING DYNAMICAL CHARACTERISTICS OF CHROMATOGRAPHY
Wei Qun DENG , Jin Fa YANG , Yun DENG
1992, 3(7): 547-550
[Abstract](57) [FullText HTML] [PDF 152KB](0)
Abstract:
A simple model of chromatographic mechanical mechanism is present, and then a scrics of theoretical chromatographic equations and fundamental Formulae are derived. These theoretical equations and formulae not only reserve thermodynamic characteristics in the current fundamental chromatographic formulae, but also introduce one or more kinetic parameter, so it is possible to make the macroscopic-control on the effect of kinetic characteristics on chromatographic system.
SYNTHESES OF TETRAHEDRAL METAL CLUSTER COMPOUNDS
Yuan Qi YIN , Hong Sui SUN , Zhuan Yun ZHAO
1992, 3(7): 551-554
[Abstract](57) [FullText HTML] [PDF 114KB](0)
Abstract:
The carbyne compound [Br(CO)2(Py)2Mo(≡CC6H5)] (Py=pyridine) (1a) reacts with Co2(CO)8, Fe2(CO)9 and Mn2(CO)10 to give tetrahedral tri-metal cluster compounds Co2Mo(μ3-CC6H5)Br(CO)8(Py)2 (2), Fe2Mo(μ3-CC6H5)Br(CO)9(Py)2 (3) and Mn2Mo(μ3-CC6H5)Br(CO)10(Py)2 (4)respectively.Tri-metal cluster compound Co2Mo(μ3-CC6H5)Br(CO)8(bipy) (bipy=α,α'dipyridyl) (5) is prepared in a similar reaction sequence from [Br(CO)2(bipy)Mo(≡CC6H5)] (1b) and Co2(CO)8. IR,1H and 13C NMR spectral data of these compounds are reported and discussed.The crystal structure of compound (5) has been determined by X-ray diffraction.
STRUCTURE OF POTASSIUM α-TRIVANADOENNEATUNGSTOGERMANATE α-K3H4GeW9V3 O40·8H2O
Ya Guang CHEN , Lun Yu QU , Song Chun JIN , Yong Hua LIN
1992, 3(7): 555-558
[Abstract](57) [FullText HTML] [PDF 125KB](0)
Abstract:
The complex K3H4GeW9V3O40·8H2O crystallized in a monocliinie system with space group P2, Mr=2784.67, a=11.099(3), b=16.452(4), c=13.534(4), Å,β=108.14°, Z=2,V=2348.49 Å3, F(000)=2456, μ=239.7cm-1, De=3.932 g/cm3. The final R=0.083 for 4528 non-zero reflexions. The structure of anions GeW9V3O409- and GeW9O3410- belongs to A-α-type.
THE SYNTHESIS AND CRYSTAL STRUCTURE OF B12 MODEL COMPOUND: 1-C4H9Co(salen)(Py)
Hui Lan CHEN , De Yan HAN , Qing Yuan WU , Wen Xia TANG , Yao YANG , Hua Qin WANG
1992, 3(7): 559-560
[Abstract](60) [FullText HTML] [PDF 90KB](0)
Abstract:
The title complex i-C4H9Co(salen)(Py) (Py=pyridine. salen=dianion of disalicylideneethylenediamine) has been first synthesized. Its crystal structure has been determined by X-ray diffraction method. The crystsis are monoclinic with space group P21/C. The unit cell parametes are presented. The structure has been refined to a final R of 0.038.
LOCALIZED STUDIES ON ELECTRONIC STRUCTURE AND CHEMICAL BOND FOR [NCCuS2MoS2]2- CLUSTER
Qian Shu LI , Song LI , Ao Qing TANG
1992, 3(7): 561-562
[Abstract](49) [FullText HTML] [PDF 112KB](0)
Abstract:
The canonical and locatized molecutar orbiters of [NCCuS2NoS2]2- cluster were calculated by means of CNDO quantum chemistry method. Then the energy and properties of corresponding chemicat bonds were discussed, especially, Cu-Sb-No three center conjugated π bonds and No-St-No conjugated π bonds were accounted for.
THE STRUCTURE OF AGGREGATION STATE AND ISOTHERMAL CRYSTALLIZATION KINETICS OF NYLON-1010
Xue Ying HUANG , Huan GAO , Zhong Chng MU , Cheng Shen ZHU , Zhi Shen MO
1992, 3(7): 563-564
[Abstract](52) [FullText HTML] [PDF 112KB](0)
Abstract:
The structure of aggregation state and isothermal crystallization behavior of Nylon-1010 have been studied by WAXD, DSC, Variance-Range Function and density measurement. The results show that crystallization of Nylon-1010 has the most suitable annealing temperature, the crystals of the Nxlon-1010 are two-dimension heterogeneous nucleation. Both low treatment temperature and high crystallization te, temperature are disadvantageous for Nylon-1010 crystal growth.
PHOTOELECTRIC EFFECTS FROM COVALENTLY LINKED PHTHALOCYANINE COMPLEXES IN BOTH BLM AND SnO2 PHOTOVOLTAIC CELL
Zhi Chu BI , Xin Li ZHAO , Yue Ying QIAN , Shu Yin SHEN , Jia Yong YU , Hui Jun XU
1992, 3(7): 565-568
[Abstract](62) [FullText HTML] [PDF 96KB](0)
Abstract:
Covalently linked phthalocyanine complexes were incorporated in bilayer lipid membranes(BLN) and deposited on SnO2 transparent electrodes, Their photovoltages were measured and compared. It has been found that a more favorable orientation and closer proximity are attained in the diad compounds between the donor (phthalocyanine)-acceptor (anthraquinone) pair than in the simple compound for efficient light-induced charge separation and transfer. The triad compound is the best among all tested compounds.
ELECTROCHEMICAL BEHAVIOURS OF CYANOETHENYL ANILINE DERIVATIVES
Dong ZHANG , Yue Shun JIANG , De Jun WANG , Tie jin LI , Bao Wen ZHANG
1992, 3(7): 569-572
[Abstract](56) [FullText HTML] [PDF 152KB](0)
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The redox behaviours of the donor-acceptor model compounds, cyanoethenyl aniline derivatives were investigated by cyclic voltammetry and the mechanism of the electrode reaction was studied in detail.
LYOTROPIC AND THERMOTROPIC LIQUID CRYSTALL INE TRIALKYL CELLULOSES OBTAINED DIRECTLY FROM CELLULOSE ACETATE IN DIMETHYL SULFOXIDE
Xin Gui LI , Mei Rong HUANG
1992, 3(7): 573-576
[Abstract](45) [FullText HTML] [PDF 412KB](0)
Abstract:
Highly substituted n-atkyl celluloses with sidechains 3 to 10 carbon atoms long have been prepared from cellulose acetate, sodium hydroxide and n-alkyl bromides with dimethyl sulfoxide as solvent. Synthetic conditions of n-alkyl celluloses were studied with respect to reaction temperature, time and yield. The molecular structure of the n-alkyl celluloses, which were obtained as white powders or as sticky, soft and birefringent solids at room temperature, was investigated by IR and NMR spectra and elemental analysine cholesteric phases in some non-polar solvents. The melting behavior and solubility of the n-alkyl celluloses were examined.
HIGH TEMPERATURE SUPERCONDUCTOR YBa2CuaO7-x AS A LITHIUM BATTERY CATHODE
Yong Yao XIA , Fen LI , Zuo Tao ZENG , Bao Chen WANG
1992, 3(7): 577-578
[Abstract](55) [FullText HTML] [PDF 79KB](0)
Abstract:
Superconductor YBa2Cu3O7-x used as a material for lithium battery was examined in 1M LiClO4 propylene carbonate/1,2-dimethoxyethane (1:1) solution. YBa2Cu3O7-x exhibited 150 mAh/g of discharge capacity at 250 uA/cm2 discharge current. An ac impedance measurements was carried out, the results have shown that the electrode reaction has low charge-transfer resistance and the chemical diffusion coeffic ient of Li+ has a value of 10-11 cm2/sec.
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