摘要:

AbstractE. M. F. of the Cell, Cd‐Hg (2‐phase)/CdAc2(m), Hg2Ac2(s)/Hg was measured at 20°, 25°, 30° and 40°C. The standard e. m. f. of the cell, Cd/CdAc3(m), Hg2Ac2(c)/Hg was evaluated as E°=1.1500−11.09×10−4T+1.06×10−8T2The thermodynamic data of the reaction, Cd(c) + Hg2Ac2(c)=2Hg(l)+Cd++(aq)+2Ac−(aq) at 25°C were estimated as ΔF°=−42,139, ΔH°=−48,698 cal mole−1and ΔS°=−22.0 cal deg−1mole−1at 25°C. The thermodynamic data for the formation of Hg2Ac2(s) were evaluated as ΔFf°=−202.3, ΔHf°=−154.5 Kcal mole−1and S°=72.9 cal deg−1mole−1. From measurements of the heats of solution of CdAc2·2H2O in aqueous solution, the relative partial molal enthalpies

ISSN:0009-4536    

DOI:10.1002/jccs.196900016

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThis is an experimental study of the hydrogen‐bonded butanediols. Infrared spectra of those butanediols were recorded for pure liquid and vapor phase. Although those molecules do not have any symmetry, with the aid of normal coordinate analysis ofn‐butane, assignments have been made for all observed infrared frequenc

ISSN:0009-4536    

DOI:10.1002/jccs.196900017

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe polarized Raman spectra of anthracene single crystal are accurately measured by photoelectrical method. All the strong lines are polarized in the cc and bb polarizations, and they should be assigned to the Agrepresentation in the molecular symmetry group of anthracene. The polarization data are not sufficient to decide the symmetry of a Raman line; therefore, the assignments recently reported by Suzuki, Yokoyama anb Itofand by Ting2based on polarizations have to be revised. The correct assignments agree very well with the fluorescance work by Lacey and Lyons,3and offer strong evidences supporting our theory proposed recently.4This theory is also tested by calculating the polarization of the most intense line at 1401 Kaisers(cm−1). The resut is very goo

ISSN:0009-4536    

DOI:10.1002/jccs.196900018

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe Raman spectra of thep‐polyphenyls: benzene, biphenyl,p‐terphenyl, andp‐quaterphenyl, are compared with their electronic spectra. The relative intensity of the double bond stretching mode around 1600 Kaisers to that of the breathing mode around 1000K increases steadily when the phenyl chain is lengthened. This intensity ratio can be calculated using our theory proposed previously.1The results are in very good agreement with the experimental observ

ISSN:0009-4536    

DOI:10.1002/jccs.196900019

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractPartial butylation of methyldichlorosilane followed by the hydrolysis of the product gave a complicated siloxane mixture, from which 1,3‐dimethyl‐1, 3‐dibutyl‐1, 3‐dihydrosiloxane (I), 1,3,5‐tri‐methyl‐1, 5‐dibutyl‐1, 3,5‐trihydrotrisiloxane (II), and 1,3,5,7‐tetra‐methyl‐1,7‐dibutyl‐1,3,5,7‐tetrahydrotetrasiloxane(III) were isolated and structurally determined. Removal of unreacted methyldichlorosilane after coupling reaction caused better yield of disiloxane, retention of methyldichlorosilane cause

ISSN:0009-4536    

DOI:10.1002/jccs.196900020

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe combination of photolysis and gas‐liquid chromatography results in “fingerprints” which are much superior to the pyrolysis gas chromatography method for the identification of organic compounds.With this photolysis‐GIC method, a number of methyl ethers, benzyl ethers, isopropyl ethers and tert‐butyl ethers were chromato‐graphically purified and photolytically decomposed by way of mercury sensitization.The photolytic degration products were temperature programmed in a sensitive gas‐liquid chromatograph.The “fingerprint” product peaks were calculated into retention indices, ΔI‐values andI‐values, and grouped into homologous peaks, common peaks and distinctive peaks.Identification of parent structures is obtained by the correlation of retention indices in the above

ISSN:0009-4536    

DOI:10.1002/jccs.196900021

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractA modified method has been developed to purify retine from pig liver. The crude extract of retine can be separated into five fractions by paper chromatography, each of them having been tested for the effect on the proliferation of protozoalTetrahymena Pyriformis. One of the fractions, G3, has the strongest effect. The present results show that G3fraction showed positive reactions toward 2,4‐dinitro‐phenyl hydrazine, ethylene diamine, and ninhydrin. Other properties of the fraction has also been stud

ISSN:0009-4536    

DOI:10.1002/jccs.196900022

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractStability of aflatoxin B1in aqueous solutions at different temperatures andpH values was studied by thin‐layer chromatography and fluorodensitometric measurements. The rate of deterioration was found to be increased with increasing temperature and also by changingpH from neutral to alkaline or acid. In acidic buffers the aflatoxin was converted to a new fluorescent product which has much lower Rfvalue than aflatoxin B1itself when chromatographed on silica gel thin‐layer plates developed with chloroform‐methanol(99:l,v/v). The UV absorption spectrum of this decomposition product has been deter

ISSN:0009-4536    

DOI:10.1002/jccs.196900023

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractAniline markedly accelerated polymerization of methyl methacrylate initiated by metal chelates of β‐diketones. The kinetic studies of the polymerizaion of methyl methacrylate initiated by Ni (II) acetyl acetonate in the presence of aniline yieldedRp=[I]0.55[A]0.66[M]1.87. The polymerization was of free radical in character. The accelerating effect of aniline was attributed to its reduction activation of the chelate. The activation energy for the overall polymerization was 21.3Kcal/mole, which yielded 33.4Kcal/molefor the activation energy for the initiati

ISSN:0009-4536    

DOI:10.1002/jccs.196900024

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY