bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pyrolysis of Organic Compounds. I. Kinetic Study of the Pyrolysis of Toluene
Authors: Takahasi Makoto 
Published: July 2006

Abstract
Pyrolysis of toluene by the flow technique was carried out under various conditions, and the velocity was measured over the wide temperature range 737∼953°C at contact time 0.02∼0.3 sec. The relation of logk versus 1/T appears to be linear, but the more precise analysis shows a slight concave nature, and therefore activation energy tends to increase, as the reaction temperature is raised. Detailed investigation on its cause was made, and it is presumed that such an increase of activation energy with rise of temperature is mainly brought about by some competitive reaction, but not by experimental conditions. The present author considers that the involvement of ring-hydrogen reaction may compete with the reaction of fission of C–H bond of the methyl group, and such competitive reaction may modify the activation energy of the fission of the methyl bond of toluene, if the experiment is carried out over the wide reaction temperature range.
Dielectric Properties of Polypeptide Solutions. Measurement of the Dielectric Properties of the α-Helix by the Low Frequency Bridge Method
Authors: Wada Akiyoshi 
Published: July 2006

Abstract
The work described above has produced the following conclusions. (1) A large electric dipole moment correspoinding to the α-helix described by Pauling, Corey and Branson is found in EDC and dioxane.
(2) A linear relation between the electric dipole moment and the molecular weight in EDC suggests that the molecule is linear and not flexible.
(3) The critical frequency of the orientation polarization was elucidated by using an equivalent ellipsoid model and the equation for the rotatory diffusion constant derived from Perrin’s equation. This fact will support the conclusion of Doty, Bradbury and Holtzer that the α-helix is fairly rigid in the solution.
(4) In dioxane the α-helix can be found to be associated and to have a different distribution in molecular weight.
Thermodynamic Studies on Cobalt Complexes. V. On the Solubility and the Thermal Dissociation of Aquopentamminecobalt(III) Nitrate and Bromide, and on the Thermodynamic Stability of Monoacidopentamminecobalt(III) Complexes
Authors: Mori Motoshichi , Tsuchiya Ryokichi 
Published: July 2006

Abstract
1. By measuring the solubility and the dissociation pressure of aquopentamminecobalt-(III) nitrate, the standard free energy of formation of the salt and that of nitratopentamminecobalt(III) nitrate produced by the decomposition of the former in the solid state were determined.
2. In the same way the standard free energy of formation of aquopentamminecobalt(III) bromide and that of bromopentamminecobalt(III) bromide were determined.
3. On the basis of these results, the thermodynamic stabilities of three aquopentamminecobalt(III) complexes, several monoacidopentamminecobalt(III) complexes and their ions were determined.
Chemisorption of Hydrogen on Zinc Oxide. III. The Effect of Additions of Foreign Ions to Zinc Oxide
Authors: Kubokawa Yutaka 
Published: July 2006

Abstract
The hydrogen chemisorption on zinc oxide samples modified by the addition of foreign ions such as Li+, Al3+, and Ga3+ was investigated by measuring the rates of adsorption and desorption, and the adsorption equilibrium. The addition of foreign ions gave little or no effect on the maximum values of the activation energy for desorption and of the heat of adsorption, and the activation energies of adsorption in similar temperature ranges. On the basis of these results combined with the effect of oxygen treatment on this chemisorption on zinc oxide described previously, it was tentatively concluded that the variation in the features of hydrogen chemisorption caused by the addition of foreign ions is probably attributable to the change in a heterogeneity of the surface rather than that in the electronic state of zinc oxide. Finally, it was mentioned that the heat of adsorption of carbon monoxide at room temperature was also unaffected by such additions.
Dichroism of Dyes in the Stretched PV A Sheet. III. Direction of Absorption of Pinacyanol Iodide
Authors: Tanizaki Yoshié 
Published: July 2006

Abstract
1. Dichroism of pinacyanol iodide in the PVA sheet was observed in the region higher than 220 mμ, and at least sixteen absorption bands were recognized.
2. The relation of Rd to Rs was analyzed concerning some absorption bands, and it was verified that there are two groups of transitions, one existing along the long axis of the molecule, the other being at right angles to one another in geometry.
3. The absorption group at right angles to one another appears in the shorter wavelength region than about 340 mμ, and it was shown that this is due to the two orthogonal electronic transitions localized in the quinoline nuclei of the molecule.
4. The absorptions of the long axis of the pinacyanol molecule consist of two groups, each involving several bands and it was pointed out that the bands are distributed with nearly constant distance of 1500 cm−1 between adjacent one.
5. It was deduced that the molecule is not a planar and both quinoline planes are far from planar.
6. Sixteen absorptions mentioned above were reasonably classified in their relation to the transition direction or in their correspondence to the molecular structure.
Spectrochemical Study of Microscopic Crystals. XX1. The Dichroism of Tris(ethylenediamine)-cobalt(III) and -chromium(III)2
Authors: Yamada Shoichiro , Tsuchida Ryutaro 
Published: July 2006

Abstract
The dichroism in the visible and ultraviolet region has been quantitatively determined at room temperature by Tsuchida and Kobayashi’s microscopic method with a single crystal of d, l-[Co en3] Cl3·3H2O, d, l- [Co en3] Br3·3H2O, d- [Co en3] Br3·2H2O and d, l-[Cr en3] Cl3·3H2O.
It has been found that the [Co en3]3+ and the [Cr en3]3+ ion show a similar type of dichroism. For both the complex ions, the z-absorption is slightly stronger than the x-absorption in the wavelength region of the first absorption band and much weaker than the x-absorption in the region of the second absorption band.
The results of the measurements are discussed in relation to the electronic state and the optical rotatory dispersion of the complex ions.
On Some Dark-colored Chlorocuprates(I, II) and Related Compounds. I. The Method of Preparation and Some Properties
Authors: Mori Masayasu 
Published: July 2006

Abstract
A series of dark-colored chlorocuprates(I, II) of hexamminechromium(III) and hexammine-cobalt(III) have been prepared. The chemical composition and the color of these compounds have been found to change continuously with the composition of the mother liquor in which they were crystallized.
The Effect of Electron Transfer in the Electronic Structure of Benzyl Radical
Authors: Mori Yuji 
Published: July 2006

Abstract
The method of composite system was applied to the calculation of the electronic spectra of benzyl radical. The results are very similar to those in the previous paper and there is no important difference between these two results though the procedures of calculation are different.
The effect of electron transfer on the transition moments of lower bands of some radicals was discussed.
Reduction of Organic Compounds with Urushibara Catalysts under High Pressure. VIII. Reduction of Acetophenone, Especially with Urushibara Nickel Catalyst Prepared by Various Modified Methods
Authors: Taira Shin-ichi 
Published: July 2006

Abstract
Catalytic reduction of acetophenone with various Urushibara nickel catalysts was studied under high pressure. The U-Ni-A with a small amount of alkali was found to be the most useful. The U-Ni-CB and U-Ni-CA were also highly active as they were in case of the reduction of benzophenone. The activity of the U-Ni-A and U-Ni-B, prepared from preserved precipitated nickel, was the same as that of the catalysts obtained from the freshly prepared precipitated nickel. In addition, it was found that the recovered Urushibara nickel catalyst could be repeatedly used after a simple regeneration process especially in the form of U-Ni-A. Such a regenerated catalyst had practically the same activity as that of the normally prepared U-Ni-A.
Rates of Solvolysis of Di-p-toluenesulfoxycyclohexanes
Authors: Mori Nobuo 
Published: July 2006

Abstract
Rates of solvolysis of cis- and trans-1,2- and-1,4-di-p-toluenesulfoxycyclohexanes were measured at 99.8°C in methanol or in acetic acid. In all cases, the solvolysis was approximately of first order.
Mean rate constants of the solvolysis increased in going from acetic acid to alcohol, and were enhanced by the addition of a small amount of alkali, in agreement with the behavior in solvolysis of primary alkyl tosylates.
The 1,2-isomers were not solvolyzed in acetic acid in 20 hr., and in ethanol containing EtONa in 0.02 mol./1., the ratio of kcis to ktrans was 5.6.
In the case of the 1,4-isomers, the ratio was ca. 0.5 in acetic acid, 0.9 in methanol without alkali, 1.1 in methanol with MeONa in 0.013 mol./1. and 1.6 in methanol with MeONa in 0.02 mol./1.
Organoboron Compounds. I. On the Reaction of n-Butylboronic Acid with Polyvinylalcohol
Authors: Kato Seiji , Tsuzuki Yojiro , Kitajima Shigenobu 
Published: July 2006

Abstract
It has been shown that PVA is partially esterified with n-butylboronic acid, giving products of the form of PVA (Remark: Graphics omitted.)B-n-Bu.
The esterification grade, Eg, of the products is estimated from the boron content. Eg increases with the increasing concentration of n-butylboronic acid used, the maximum Eg being 85.6%. Eg rises from 69.3 to 85.6% as the reaction temperature is elevated from 40 to 70°C.
On treating with n-butylboronic acid PVA shows new absorption bands 1190 and 1390 cm−1 in deeper infrared spectra, which are assigned respectively to –B–C and –B–O bonds. At the same time the OH stretching absorption band at 3280 cm−1 of PVA shifts to a higher frequency, and decreases in intensity with the increasing Eg.
Study on Metal Complexes of Analytical Importance. I. Vanadium Complexes of 8-Quinolinol and 2-Methyl-8-quinolinol
Authors: Nakamura Hiroji , Shimura Yoichi , Tsuchida Ryutaro 
Published: July 2006

Abstract
New complexes, [VO(OH)(CH3-oxin)2], [VO(OH)(CH3-oxin)2(OH2)2] and Na[VO(O)(CH3-oxin)2(OH2)2]·2H2O have been prepared and discussed in relation to the structures.
From experimental evidences of these complexes and of 8-quinolinol-vanadium complexes, we have concluded that the violet form of 8-quinolinol-vanadium complex has a cis configuration and that the red form has a trans one.
Rheological Properties of Hydrogels of Agar-agar
Authors: Arakawa Kiyoshi 
Published: July 2006

Abstract
A theological study was made for the hydrogels and the solution of agar-agar. The viscosity vs. concentration relation exhibits the character of polyelectrolyte. From the stress relaxation data obtained by a chainomatic balance relaxometer the following results were obtained.
1) The behavior of hydrogels of agar-agar is represented by the 6-elements mechanical model.
2) The activation energy of the secondary bond between agar-agar molecules which constructs the gel structure is 4.5∼6.6 kcal./mol.
Then, there was some discussion on the structure of the hydrogels of agar-agar.
On the Temperature Dependence of Spectra of Solvated Anions
Authors: Maruyama Akira , Shimoji Mitsuo , Niwa Kichizo 
Published: July 2006

Abstract
The effect of temperature on the ultraviolet spectra of solvated anions is examined experimentally and theoretically. The shift of the spectrum to the longer wavelength with increasing temperature can be explained in terms of the oscillator model of the solvent molecules. This corresponds to the increase of the ionic radii (or the radius of the cavity) with the temperature rise.
On Some Dark-colored Chlorocuprates(I, II) and Related Compounds. III. X-Ray Study and Reflectance Measurements
Authors: Mori Masayasu 
Published: July 2006

Abstract
The ionic species of Cu(II) in hexamminechromium(III) chlorocuprate(I, II) has been found to be a trigonal-bipyramidal [CuCl5]3− ion. Reflectance measurements have shown the existence of diffuse interaction absorption in some chlorocuprates(I, II) and chloroplumbates (II, IV). A strong charge transfer band of [CuCl5]3− was also found in the neighborhood of 2.7×104 cm−1 for hexamminechromium(III) chlorocuprate(I, II) and hexamminechromium (III) chlorocuprate (II).
Infrared Absorption Spectra of Water of Crystallization in Cobaltous Chloride Hexa- and Dihydrate Crystals
Authors: Gamo Itaru 
Published: July 2006

Abstract
The observed spectra of the water of crystallization were interpreted by the effects of coördination and hydrogen bonding. The total difference in the spectra of the two crystals wasexplained in relation to the difference in their atomic arrangements.
Absorptiometric Determination of Micro-amounts of Iron in Nuclear Grade Graphite and Urania-Graphite Fuel; Nitroso R Salt Method after Coprecipitation of Iron with Manganese Dioxide
Authors: Miyamoto Masatoshi 
Published: July 2006

Abstract
An absorptiometric determination of micro-amounts of iron with nitroso R salt was satisfactorily applied to the routine analysis of nuclear grade graphite. An ashed sample is brought into a solution and the color of iron is developed by the reagent with the aid of hydroxylamine sulfate. Adjustment of pH to the optimum range is easily made by the addition of a definite amount of an acetate buffer. The intensity of the color is measured at 715 mμ. The range of the determination covers 2 to 75 p. p. m. when 1 g. of a sample is taken, the final volume being 25 ml. In the case of a sample of urania-graphite fuel, the ash is fumed with perchloric acid and a preliminary separation is made by coprecipitation with manganese dioxide which is produced by the oxidation of manganese (II) ion with hydrogen peroxide in a hot ammoniacal carbonate solution. The recovery of iron is quantitative and the removal of diverse ions is satisfactory. All of the uranium is also removed here. Contamination with foreign iron from a drill used for sampling and from the platinum or percelain crucibles used is negligible. The effect of diverse ions on the absorptiometry was also examined.
Some Observations on the Process of Dehydration and Rehydration of Gypsum by Means of Proton Magnetic Resonance
Authors: Saito Tatsuo 
Published: July 2006

Abstract
1) On the thermal dehydration in vacuo, the characteristic single sharp peak of proton resonance was observed for the specimens dehydrated at the temperature from 70 to 150°C.
It is assumed that this single sharp peak is attributed to the zeolitic water probably existing in the space of the crystal lattice of soluble anhydrite and that this zeolitic water can be interpreted as being a part of the water molecules which originate from dihydrate during the thermal decomposition.
2) Calcium sulfate hemihydrate was formed by the rehydration of gypsum dehydrated in vacuo. This hemihydrate showed the proton resonance spectrum corresponding to the signal of three spin type with an intensive center peak. This intensive center peak can be interpreted as an indication of the movable water existing in the space of the crystal lattice of hemihydrate.
3) This hemihydrate was considerably stable under the atmosphere of saturated water vapor. This was ascertained by the NMR measurements.
Silanes. Vibrational Assignments and Frequency Correlations
Authors: Janz George J , Mikawa Yukio 
Published: July 2006

Abstract
The status of knowledge relative to the vibrational assignments, molecular structure, and spectral data for a series of about one hundred silanes has been surveyed and is reported in brief tabular form. A scheme of simplified vibrational modes is discussed, and used to develop the assignment of fundamentals for some fifty five silanes. Some new assignments are proposed in the light of a correlation rule which has been developed. Tables of characteristic frequencies, and the best values for bond distances, based on this work, are presented.
Determination of Ortho-, Pyro- and Tripolyphosphate by the Use of α Small Column of Ion-exchange Resin
Authors: Ohashi Shigeru , Takada Shichiro 
Published: July 2006

Abstract
The authors presented the new rapid method for the determination of ortho-, pyro- and tripolyphosphate in the mixture by the use of a small column, 2.6 mm. in diameter and 60 mm. in height, of ion-exchange resin, Dowex 1–X4 (200∼400 mesh). The continuous-gradient elution method was applied and the paper micro-fraction collector was used. For example, by the use of 2 m potassium chloride of pH 4.5 as the stock solution, 100 μg. as phosphorus of each phosphate species can be separated by letting only 79 drops of the eluant flow. The quantitative data obtained by the present method were well coincident with the calculated values or the data obtained by the paper chromatography.
The Infrared Absorption Spectrum of 1, 2, 4, 5-Tetrachlorobenzene in Vapor State
Authors: Saëki Shinnosuke 
Published: July 2006

Abstract
The infrared absorption spectra of ordinary and deuterated 1,2,4,5-tetrachlorobenzenes were measured in the vapor state using the high temperature cell. For the results obtained by the measurements we proposed two possible assignments of the fundamental infrared bands, and made the discussion comparing these two tentative assignments. However, at present we have no experimental base upon which we can decide the superiority of one to the other. In order to solve this difficulty we are going to make an investigation of the spectra of these molecules in the far infrared region as well as the calculation of the exact force constants of the chlorobenzenes.
π Electronic Structure of Cinnamaldehyde
Authors: Inuzuka K\={o}z\={o} 
Published: July 2006

Abstract
State energies of the cinnamaldehyde molecule are calculated by the simple LCAO-MO method, including configuration interaction and assuming the C2v symmetry. The results of the calculation conform well with the observed absorption bands lying in the 2000∼3000 Å region. In cinnamaldehyde the 280 mμ band is assigned to the intramolecular charge transfer band. The B2− band which we could not find in spectrum of cinnamaldehyde may be covered under the charge transfer band which is greatly shifted toward the red as the result of extension of conjugation. In the region of the band IIc two peaks at 224 and 218 mμ represent two different transitions, respectively. The former is assigned to the B2+ type transition and the latter to the transition in the acrolein group.
The Chemical Reaction in Silent Electric Discharge. I
Authors: Morinaga Kihei , Suzuki Momotaro 
Published: July 2006

Abstract
1. The ozone yield Y from oxygen gas in the silent electric discharge in a Siemens ozonizer is proportional to the pulse current which was measured from an oscillogram where Y is referred to τ=0 value. The proportionality is valid independent of the gap distance d between electrodes and the effective area A of electrodes.
2. The above ozone yield Yi which is referred to τ=0 and further to unit pulse current is proportional to A/d.
3. The reason of the above relationship briefly discussed.
Mass-spectrometric Study on Ionization and Dissociation of Diethyl Ether by Electron Impact
Authors: Kanomata Ichiro 
Published: July 2006

Abstract
A mass spectrometric study on ionization and dissociation of diethyl ether has been carried out.
The M/e=31 ion is the most abundant among the ions produced by 75 eV. electron impact and the M/e=29, 59, 45 and 74 ions are abundant in this order next to M/e=31 ion.
The appearance potential measurement of these ions leads to the following conclusion. The ions are formed by the removal of one of the lone pair electrons of the oxygen atom in the molecule.
By considering the trivalent structure of O+ and by applying the bond energy additivity, which is adequate for hydrocarbons, to such an ionized dissociation process the producing processes of such ions can be satisfactorily revealed.
The stabilization energy for the formation &gt;C=O+- structure is obtained as 54 kcal./mol. by such a calculation.
Proton Magnetic Resonanace Spectra of p-Cresol
Authors: Yamaguchi Ichiro 
Published: July 2006

Abstract
The proton magnetic resonance spectra of p-cresol in several solutions were measured. The concentration dependence of the resonance in methyl protons suggests no remarkable effect of the hydrogen bonding on methyl protons. The resonance in the hydroxyl proton shows characteristic concentration dependences which are ascribed to the dissociation of the associated molecule in benzene, chloroform and carbon tetrachloride solutions and to the formation of new hydrogen bonds with solvent in acetone, dioxane and pyridine solutions.The ring proton resonance spectrum is a single line in concentrated range whereas it is an A2B2 type spectrum in dilute range. The splitting of the spectrum in dilute solutions is ascribed to the change in the screening of the proton ortho to the hydroxyl group affected by the change in the intermolecular hydrogen-bonding situation. The shielding of the proton ortho to the methyl group appeared to be unaffected by the same change.
Nuclear Magnetic Resonance in Amino-group of Aniline Derivatives
Authors: Yamaguchi Ichiro 
Published: July 2006

Abstract
Concentration dependence of the chemical shift of amino protons in aniline derivatives in carban tetrachloride and acetone solutions were measured. The chemical shift of the amino proton in aniline derivatives is revealed to be clearly dependent on the existence of the ortho-methyl group. In carbon tetrachloride solutions, the concentration dependence of the resonance lines is slight, suggesting that the association of the solute molecules by hydrogen bonding is very weak. In acetone solutions, the dependence suggests hydrogen bond formation between solute and acetone. The base strength of aniline derivatives appeared to have no direct correlation with the magnitude of the chemical shift of amino proton in these compounds. The ring proton spectra of dimethyl aniline are slightly concentration dependent. The resonance in the ortho-protons appers to be displaced to a lower field on dilution and this tendency was ascribed to the change in the electrostatic field at the proton arising from the N–H bond moment change by hydrogen bond formation.
Infrared and Raman Spectra of Diethoxymethane and Diethoxymethane-d2
Authors: Nukada Kenkichi 
Published: July 2006

Abstract
Infrared spectra between 3000 and 280 cm−1 (vapor and liquid phases) and Raman spectra (liquid phase) of diethoxymethane (C2H5·OCH2OC2H5) and of diethoxymethane-d2 (C2H5OCD2OC2H5) were observed and the assignment of the spectra is presented with the assumption that these molecules take one form both in the vapor and liquid phases. In the assignment, that of the homologues such as dimethoxymethane, its deuterated compounds, methoxyethoxymethane and diisopropoxymethane, are taken into consideration.
Structure of Enteromycin. III. Structure of Demethoxyenteromycin
Authors: Mizuno K\={o}mei 
Published: July 2006

Abstract
The structure of dehydroxydihydrodemethoxy-enteromycin was assumed to be N-glycyl-3-aminoacrylic acid. From the fact that catalytic reduction of O-acetyldemethoxyenteromycin afforded acetic acid and glycyl-β-alanine, and that N-methyl- and O-methyldemethoxyenteromycin methyl ester have the partial structures, of N-(N-oxy-methyliminoacetyl)- and N-(O-methylhydroxyiminoacetyl) -, respectively, it was made clear that demethoxyenteromycin is an aldoxime having the structure of N-(hydroxyiminoacetyl)-3-aminoacrylic acid.