摘要:

AbstractThe use of potassium chromate as indicator in silver‐ferrocyanide titration has been studied. It has been found that silver‐ferrocyanide titration can be conducted satisfactorily in neutral or nearly neutral medium, using potassium chromate as indica

ISSN:0165-0513    

DOI:10.1002/recl.19650840112

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractThe suitability of Methyl Orange and Methyl Red as indicators in the titration of molybdenum (V) with ceric sulfate has been investigated. It has been found that molybdenum (V) can be titrated with ceric sulfate at room temperature (1) in hydrochloric acid medium with 2‐3 drops of 0.2% Methyl Orange as indicator; and (2) in sulfuric acid medium with 2‐3 drops of 0.2% Methyl Orange or Methyl Red as indica

ISSN:0165-0513    

DOI:10.1002/recl.19650840113

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractBy electron diffraction it has been found that selenium trioxide vapour contains tetrameric ring molecules dissociated to the extent of about 30% into monomer at 120°. Principal distances are: in the monomer: Se‐O, 1.69 Å; in the tetramer: Se‐bridging O, 1.80 Å; Se‐non bridging O

ISSN:0165-0513    

DOI:10.1002/recl.19650840114

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractA method is devised for the determination of free enthalpies of transfer from one solvent to another for single ions. Results are given for the transfer from water to water‐methanol mixture

ISSN:0165-0513    

DOI:10.1002/recl.19650840115

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractThe behaviour of the calcium‐aluminium‐alizarate complex on alumina is described. By elution with mixtures of dimethylformamide and water two fractions can be isolated. It has been shown that these fractions are notcis‐transisomers. In all probability the two fractions differ in the charge distribution of the electrons, caused by a difference in water co

ISSN:0165-0513    

DOI:10.1002/recl.19650840116

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractIt is proposed that for liquid unassociated compounds well below their critical temperaturesLog p/pb) = Log Vg/VL)b\documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Log}\;{\rm p}/{\rm p}_{\rm b} = ({\rm Log}\;{\rm V}_{\rm g} /{\rm V}_L ){\rm b}\left( {1 - \left( {\frac{{T_b }}{T}} \right)^n } \right) $$\end{document}where p and pbare vapour pressures at the absolute temperature T and at the boiling point Tbrespectively; Vgand VLare the molecular volumes of the compound in the vapour and liquid phases (the figures here referring to the boiling point); and n is a constant for a given compound. For monatomic gases n is one and for higher members of homologous series it is about two. For many substances, n can be taken as 1.7 and log10(Vg/VL)bas 2.7: the equation with these values may be used to estimate vapour pressures of unassociated compounds. Moreover, for very similar compounds Tbnis proportional to the parachor.

ISSN:0165-0513    

DOI:10.1002/recl.19650840117

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19650840118

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractMethyl malonate (A), methyl succinate (B), methyl glutarate (C) and methyl 3‐oxocyclobutanecarboxylate (D) are formed from diazomethane and carbon suboxide in the presence of methanol. A mechanism is proposed for this reactio

ISSN:0165-0513    

DOI:10.1002/recl.19650840119

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19650840120

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractOn a synthétisé un certain nombre d'éthers β‐diéthylaminoéthyliques des p‐hydroxybiphényle, chloro‐3 hydroxy‐2 biphényle, bromo‐5 hydroxy‐4 biphényle et dihydroxy‐2‐2′ biphényle, afin d'examiner certaines des propriétés pharmacodynamiques des substances ainsi obtenues. Les éthers possèdent une bonne activité spasmolytique et sont comparables

ISSN:0165-0513    

DOI:10.1002/recl.19650840121

出版商:WILEY‐VCH Verlag    

年代:1965

数据来源: WILEY