摘要:

AbstractThe density of a series of aliphatic amines together with that of aniline and its methyl derivatives has been measured over ranges of temperature below and above the normal boiling point. The variation of orthobaric density difference may be represented by equations of the Verschaffelt type using estimated values of the critical temperature. On this basis it is found that the exponent for the lower members is slightly higher than that for non‐associated liquids and that its value decreases with increasing complexity of the amine. In general, the exponent for secondary amines is lower than that for primary amines, and the still lower values for tertiary amines is to be ascribed to causes other than hydrogen bonding. The behaviour of aniline and its N‐methyl derivatives is well represented by the Verschaffelt equation over a range of 300°.It is shown that theLewisequation relating to zero and critical densities is obeyed closely by associated substa

ISSN:0165-0513    

DOI:10.1002/recl.19590780602

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractAn improved synthesis ofDL4‐oxalysine is described, with reference to the reactions outlined in the flow‐sh

ISSN:0165-0513    

DOI:10.1002/recl.19590780603

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractIn contrast to other organic peracids, peroxytrifluoroacetic acid smoothly oxidizes 2,6‐dibromopyridine to its N‐oxide in good yi

ISSN:0165-0513    

DOI:10.1002/recl.19590780604

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractMeasurements of the vapour pressure of solid tungsten trioxide between 1100° and 1250° C show that these vapour pressures cannot be calculated by extrapolation from the measurements carried out byKözo Inouebetween 800 and 850°.Conversely, the vapour pressure formula, which we have found, is in good agreement with the measurements between 800 and 8

ISSN:0165-0513    

DOI:10.1002/recl.19590780605

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractThe increased volatility of tungsten trioxide in an inert atmosphere containing water vapour, must be ascribed to the formation of a volatile compound.The composition of this compound is probably WO31H2O. The equilibrium between solid WO3, water vapour and gaseous compound shifts as the temperature is increased towards the formation of the compound. Thus on lowering the temperature the compound will break down again into anhydrous oxide and water.Hence this compound has the same empirical composition as tungstic acid (H2WO4). Experiments in this laboratory have shown that solid tungstic acid passes over into the anhydrous oxide at ∼ 180° and a pressure of 10 atmospheres (quadruple point WO31H2O ‐ WO3‐L ‐G). At the temperatures at which our investigation has been carried out therefore, the assumption that the gaseous compound can exist also in the solid state, must be regarded as im

ISSN:0165-0513    

DOI:10.1002/recl.19590780606

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19590780607

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractPure bovine serum albumin, which has no Na•/K•‐selectivity, may become strongly selective for Na•or for K•if it is associated with positive or negative detergents.A strong influence of the salt anion is observed: if Br′ is used instead of Cl′, the negative charge of the albumin grows considerably in most cases. The Na•/K•‐selectivity is highest when the negative charge of

ISSN:0165-0513    

DOI:10.1002/recl.19590780608

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractOsmotic pressure measurements over a range of polymer concentration are reported for a high molecular weight sodium polyacrylate fraction of one‐third and full neutralization in 0.1M‐sodium chloride solutions. From data on solutions sufficiently concentrated in polymer to justify representation as uniform dispersions of segments in solvent, values of an effective charge parameter are calculated. These are compared with charge parameters deduced indirectly, although in an equivalent manner, from previous dilute solution studies on related syst

ISSN:0165-0513    

DOI:10.1002/recl.19590780609

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractThe rearrangement of 1‐naphthyl acetate in nitrobenzene solution, catalysed by aluminium chloride, to give 2‐ and 4‐acetylnaphthol, appears to be intramolecular in nature. A mechanism to account for the experimental results is proposed. While the main product is thep‐hydroxy‐ketone, moderate yields of theortho‐substituted product are al

ISSN:0165-0513    

DOI:10.1002/recl.19590780610

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY

摘要:

AbstractThe corresponding diphenylpyridylmethanes and phenyldipyridylmethanes are produced from diphenylpyridylcarbinols and phenyldipyridyl carbinols, respectively, by reduction with hydriodic acid in glacial acetic acid or with phosphorus triiodide and hydriodic acid. Tripyridylcarbinols are not reduced under these conditions.Diphenyl(β‐pyridyl) acetic acid is obtained from diphenyl(β‐pyridyl) methane by the action of phenyllithium‐phenylsodium and subsequent carbox

ISSN:0165-0513    

DOI:10.1002/recl.19590780611

出版商:WILEY‐VCH Verlag    

年代:1959

数据来源: WILEY