摘要:

AbstractA polarographic study of dipicrylamine in a series of buffer solutions was carried out. In order to estimate the acidity of the free amine, the apparent ionization constant of dipicrylamine was evaluated from the results of potentiometric titrations of sodium dipicrylaminate with hydrochloric acid at 25°C. The effect of pH values and concentrations of solutions on the half‐wave potentials were observ

ISSN:0009-4536    

DOI:10.1002/jccs.195500001

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractA cell,was used for evaluating the standard potentials of the silver‐silver chromate electrode by extrapolation method. The results are in good agreement with, and give a confirmation for, those obtained in the author's previous investigatio

ISSN:0009-4536    

DOI:10.1002/jccs.195500002

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe stabilities of the complexes formed by hinokitiol (β‐isopropyl tropolone) and bivalent metals, Cu, Pb, Zn, and Ni, were studied stepwisely by means of potentiometric titration with glass electrode. The stability constants, K1and K2for copper, zinc and lead‐hinokitiol complexes, (M. Hin)+and (M. Hin2), and K1, K2and K3for nickel complexes, (M. Hin)+, (M. Hin2) and (M. Hin3)−, were evaluated from the pH values ob

ISSN:0009-4536    

DOI:10.1002/jccs.195500003

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractBoth cycloheptatrienylium (tropylium) cation and anion are treated in terms of the M.O. theory. The π molecular orbitals in the order of an increasing energy are calculated. The molecular structure: π electron distribution, final charge distribution, final fractional bond ordor, bond length of each C‐C bonds, are also calculated for the ground state. It is concluded that both of the tropylium ions have C2esymme

ISSN:0009-4536    

DOI:10.1002/jccs.195500004

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe M.O. theory is applied to treat the hyperconjugation in cyclopentadiene, cycloheptatriene and toluene. The results obtained are listed in Table 1, and briefly discussed in relation to the experimental facts.

ISSN:0009-4536    

DOI:10.1002/jccs.195500005

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe separation of uranium from thorium by anion exchange resin Amberlite IRA‐400 in ethylenediaminetetraacetate (E. D. T. A.) form was studied. After these two elements were adsorped by the resin in E.D.T.A. form, it was found that thorium could be easily desorbed with dilute solution of ferric acetate but uranium was stable toward this solution. Uranium could be only desorbed with 0.02 N of hydrochloric acid after. it was washed throughly with distilled water. These results were quite contrary to those obtained in aqueous solution by Cobell(1), who reported that the complex formed by uranium with E.D.T.A. was weaker than those of thorium. Advantage was taken of the stronger adsorption of uranium by resins in E.D.T.A. form for the separation of these two elements with quite satisfactory result

ISSN:0009-4536    

DOI:10.1002/jccs.195500006

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractSince oxine‐sulfonic acid complex of lanthanum is much less complex than that of tetravalent cerium, by moderate heating of the mixed solution with sodium carbonate in excess, the lanthanum complex ion breaks down and precipitates quantitatively as carbonate, which is nearly insoluble in excess of sodium carbonate solution. The cerium complex ion, on the contrary, remains in the solution without decompositio

ISSN:0009-4536    

DOI:10.1002/jccs.195500007

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe reaction of iodoacetic ester with disodium enolate of succinosuccinic ester has been found to give two C, C‐derivatives, presumably geometrical isomers. Both of them have been isolated as crystalline substances. The oily product from which these crystalline substances had been removed, has been found to consist mainly of an unsaturated substance resulted from the catalytic decomposition of one of the C, C‐derivatives. Characterisation and cleavage of these substances led to interesting resu

ISSN:0009-4536    

DOI:10.1002/jccs.195500008

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractFour crystalline components, Taiwanin A, B, C and D were isolated from the acetone extract of the heartwood of Taiwania Cryptomerioides Hayata by chromatographic method.

ISSN:0009-4536    

DOI:10.1002/jccs.195500009

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe lower boiling point fraction (b.p. ca. 130°/15 mm) of the essential oil of Chamaecyparis taiwanensis was thoroughly studied. p‐Cresol, α‐Thujaplicine and one new tropolonoid were newly identified as the additional components. 1‐Rhodinic acid, Hinokitiol and Terpin hydrate were also identified in this f

ISSN:0009-4536    

DOI:10.1002/jccs.195500010

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY