摘要:

Commercial sodium di-tert-butylnaphthalenesulphonate has been resolved into its isomers, which were shown to be sodium 2,6- and 2,7-di-tert-butylnaphthalene-4-sulphonates.

ISSN:0008-4042    

DOI:10.1139/v61-088

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

The equilibrium diagrams show that a compound, stable in the solid state, is formed in the system chloroform–acetone, but no compound is formed in the binary systems chloroform–benzene and acetone–benzene. The ternary equilibrium diagram, the heats of mixing, and the dipole moments, all show that this compound continues to exist in the presence of benzene, up to a high concentration of benzene. Since a series of ternary mixtures is shown to exist having zero heat of mixing, it was thought that this series of mixtures might behave in a pseudoideal manner, but the determinations of density (molar volume) and boiling point show that this is not so.

ISSN:0008-4042    

DOI:10.1139/v61-089

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

Discrepant interpretations regarding the frequency of the C=S stretching mode are reviewed and assignments of frequencies for the vibrational modes of the xanthate group,are presented.A band at 1020–1070 cm−1is assigned to the C=S stretching mode. Bands at 1200 cm−1and 1110–1140 cm−1are ascribed to the stretching vibrations of the C—O—C linkage.The effects of the alkyl hydrocarbon chain length and of metal atoms (alkali metals, copper, and zinc) in displacing some of the frequencies are recorded.

ISSN:0008-4042    

DOI:10.1139/v61-090

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

Methylethylmaleimide, methyl-n-propyl maleimide, and dihydrohematinic acid imide are obtained fromChlorobiumpheophorbide (660) on chromic acid oxidation. The separation and isolation of these products and of other imides and pyrroles by gas–liquid partition chromatography is described.

ISSN:0008-4042    

DOI:10.1139/v61-091

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

The scope of the reaction of halogen-substituted nitriles and amines was extended by including trifluoro- and dichloro-acetonitrile. Trifluoroacetonitrile reacts easily with primary and secondary aliphatic, primary aromatic, and heterocyclic amines to give the corresponding amidines. N-Mono- and N-di-substituted dichloroacetamidines were prepared from dichloro-acetonitrile and amines, Trichloroacetonitrile also affords N-substituted amidines with heterocyclic amines.

ISSN:0008-4042    

DOI:10.1139/v61-092

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

The absorption spectrum of diphenylene has been measured in the vapor at a variety of temperatures, in solution at room temperature, and in an EPA rigid glass at 90 °K. From a consideration of the band structure and intensity distribution it was concluded that the weak absorption at 25,041 cm−1(vapor; ƒ ≈ 10−3) is due to a symmetry-forbidden electronic transition. The theoretical prediction that the excited level is of speciesB1gwas supported by the presence of a strong infrared band at 732 cm−1corresponding to observed perturbing vibration of frequency 792 cm−1. The solution spectrum was found to exhibit a vibrational structure typical of ag–gforbidden excitatio

ISSN:0008-4042    

DOI:10.1139/v61-093

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

Using a silver – silver chloride reference electrode, the electrode potentials of the system U, UCl3(KCl, NaCl) and the redox potentials of the system Pt, UCl3, UCl4(KCl, NaCl) were measured at various concentrations of the uranium chlorides and at temperatures between 650 and 850 °C.From the results, the electrode potential of the system U, UCl4(KCl, NaCl) was calculated. In addition, the activity coefficients and partial molal properties of dilute solutions of UCl3and UCl4in the equimolar mixture of potassium and sodium chlorides were calculated.

ISSN:0008-4042    

DOI:10.1139/v61-094

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

Several carboxymethylmercapto and carboxymethylsulphonyl derivatives of nitroimidazole were prepared for biological testing. Reduction or reductive cyclization of these compounds was unsuccessful.

ISSN:0008-4042    

DOI:10.1139/v61-095

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

The proton nuclear magnetic resonance (N.M.R.) spectra of the four diastereoisomers of camphane-2,3-diol are reported. The coupling constants between the 2-, 3-, and 4-protons agree with the values predicted by Karplus for ethane derivatives. In particular, the cis (0° dihedral angle) coupling constants (7.7 and 8.9 c.p.s.) are much larger than the trans (120° dihedral angle) coupling constants (2.2 and 2.3 c.p.s.). Unexpected 1,3-coupling betweenexo-hydrogen atoms occurs in some of the compounds studied.

ISSN:0008-4042    

DOI:10.1139/v61-096

出版商:NRC Research Press    

年代:1961

数据来源: NRC

摘要:

The observed stability of stable bridge structure,in aluminum alkoxides has been explained on the powerful tendency of aluminum to attain co-ordination number 4. This would predict the monomeric nature of the derivatives of the type, (OR)2Al(lig), where ligand (lig) is a diketone like acetylacetone (acac), benzoylacetone (bzac), or ketoester like ethyl acetoacetate (etac). This has been confirmed by actual synthesis of these compounds by reactions between aluminum alkoxides (ethoxide and isopropoxide) and acetylacetone, benzoylacetone, and ethyl acetoacetate in equimolecular ratios. These and also (OR)Al(lig)2as well as Al(lig)3have been shown to be monomeric in boiling benzene. The volatility of the derivatives was found in the order [(OPri)3Al]2 > (OPri)2Al(acac) > (OPri)Al(acac)2. This leads to the conclusion that chelation lowers the volatility and the direct relationship between volatility and molecular complexity, observed in the case of simple alkoxides, is not applicable in these derivatives. Further mixed derivatives of the type Al(acac)(etac)2and Al(etac)(acac)2have also been synthesized during the course of the above work.

ISSN:0008-4042    

DOI:10.1139/v61-097

出版商:NRC Research Press    

年代:1961

数据来源: NRC