By the absorption spectra, it was found that benzene and styrene were independently produced from C.O. T. when C.O.T. was excited by the light shorter than 3000 Å., and that some unknown substances giving a sharp line at 2916 Å. and two diffuse bands at 2916 Å.∼2885Å. and 2840 Å.∼2700 Å. were also produced. The gas like acetylene which can not be condensed by dry ice can be at the same time produced. The quantum yield of reaction where C. O. T. is decomposed to benzene by light near 2537 Å was about 0.1. And the light which has the shorter wave length than 2500 Å. mainly contributes to the reaction in which C. O. T. decomposes to benzene.
(1) It was possible to assign the crystallographic indices to the etched surfaces of single crystals by the combination of electron microscopy and diffraction. (2) The (110) plane of nickel crystal was most active and the (111) plane was most inactive among the principal planes of crystal.
The dichroism of crystals of BaPt(CN)4·4H2O, CaPt(CN)4·5H2O and MgPt(CN)4·7H2O has been measured in the visible and the near-ultraviolet region, and with the aid of results of this measurement, the state of the complex ions in the crystals has been, discussed in relation to their crystal structures. These crystals show similar dichroism, with the characteristic sharp absorption band for //-absorption. It has been concluded that be-ween adjacent tetragonal complex ions piled upon one another along the c-axis in these crystals there exists a sort of direct interaction, which is supposed to be related to the unusual colors of these compounds. It has been found that as the distance between platinums decreases in the order of Ca, Ba and Mg salts, the interaction between platinum ions becomes stronger, and that the characteristic band becomes sharper and is displaced towards longer wave-length. The interaction in these crystals is regarded as more remarkable than that in Magnus’ salt.
Of the oxidation-reduction reaction of organic compounds, the case, in which the undissociated molecule of an organic acid is reduced at the more positive potential than the corresponding dissociated anion and the equilibrium concentration of the reducible form at the electrode surface is kept by the diffusion process and the recombination reaction at the electrode surface, has been taken into consideration. Under such conditions, the general formulae for the polarographic current-voltage curve have been derived, and the special case which involves the “ kinetic current” has been investigated. The theoretical discussions on the limiting current and the shift of the half-wave potential with the change of pH have been carried out. Moreover, the results obtained have been applied to interpret the properties of the wave of pyruvic acid observed by R. Brdicka. A considerably good agreement between the experimental data and the theoretical results has been obtained, and it is probably said that the properties of the various polarographic waves and the mechanism of the electrode process can be investigated by the analogous treatment mentioned above.
The effect of gelatin on the polarographic waves of p- and o-nitroanilines has been investigated, (1) Maxima of the polarographic waves of these compounds which occur in the supporting electrolyte without gelatin were supressed by adding 0.005-0.01% of gelatin to the supporting electrolyte. (2) The wave of each of these compounds splitted into two waves when the supporting electrolyte contained more than 0.01% of gelatin. (3) The ratio of the wave heights of the second wave to the first increased with increasing concentration of gelatin, and it was different between p- and o-compounds in the supporting electrolyte containing the same concentration of gelatin. (4) The wave heights of the first and the second waves of each compound were proportional to the concentration. (5) These double waves were applied to the simultaneous determination of both compounds, with the result that the procedure was available for rough estimation of content.
(1) In the study of the equilibrium pressure of the CO2-NH3-Urea-H2O system, it was experimentally found that the equilibrium pressure of the system is a function of loading, density of reactants in the reaction vessel at a given temperature. (2) The experimental equations that show the relation between temperature and equilibrium pressure were studied at various loading densities, under conditions that loading mol ratio of carbon dioxide to ammonia was one by two, and at the temperature range 130° to 170°. (3) It was verified that the diversity of the equilibrium pressure of the system is reasonable.