摘要:

AbstractThe theory developed in part IV1and part VI2of this series has been verified by experiments.The results are:\documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{lrlr}{{\rm Zn}^{ + + } /{\rm Zn}({\rm Hg})\,{\rm in}\,1\,M\,{\rm KCl}\,{\rm at}\,25^\circ :} & {{\rm k}_{{\rm sh}} = 4.9 \cdot 10^{ - 3} \,{\rm D}_{{\rm Zn}^{ + + } } } & { = 7.8} & { \cdot 10^{ - 6} } \\ {{\rm Zn}^{ + + } /{\rm Zn}({\rm Hg})\,{\rm in}\,1\,M\,{\rm KI}\, + 0.01\,N\,{\rm H}_2 {\rm SO}_{\rm 4} {\rm at}} & {25^\circ :{\rm k}_{{\rm sh}} = 0.12\,{\rm D}_{{\rm Zn}^{ + + } } } & { = 7.9} & { \cdot 10^{ - 6} } \\ {{\rm Cd}^{ + + } /{\rm Cd}({\rm Hg})\,{\rm in}\,1\,M\,{\rm KCl}\,{\rm at}\,25^\circ :} & {{\rm k}_{{\rm sh}} > 12\,{\rm D}_{{\rm Cd}^{{\rm + + }} } } & { = 8.9} & { \cdot 10^{ - 6} } \\ {{\rm Cd}^{ + + } /{\rm Cd}({\rm Hg})\,{\rm in}\,1\,M\,{\rm KCl}\,{\rm at}\,0^\circ :} & {4 < {\rm k}_{{\rm sh}} < 8\,{\rm D}_{{\rm Cd}^{ + + } } } & { = 4.02} & { \cdot 10^{ - 6} }\end{array} $$\end{document}

ISSN:0165-0513    

DOI:10.1002/recl.19630820602

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractThe anomalous behaviour of the Tl+/Tl(Hg) electrode in 1 KNO3+ 0.1MKCl solution has been studied experimentally applying the theory described in parts IV and VI of this series. It is shown that this anomaly can be explained assuming that the double layer capacity increases on adding thallous ions. The increase Δ C appears to be proportional to the TI+concentration. The phase angle Φ of the faradaic impedance is equal to π

ISSN:0165-0513    

DOI:10.1002/recl.19630820603

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

Abstractt‐Butylbenzene has been sulphonated homogeneously in aqueous sulphuric acid solutions varying from 72.4 to 91.0 wt‐% at 5.0°, 25.0° and 35.0°. Under these conditions dealkylation oft‐butylbenzene occurs. Pseudo first order rate constants for the sulphonation and the dealkylation reaction have been determined.The overall rate constant for sulphonation oft‐butylbenzene is smaller than that of toluene. It is suggested that this difference arises predominantly from increased steric hindrance fororthosubstitution in the former case.The overall rate constant for dealkylation increases rapidly with increasing acid concentration: at 25° d(logkexp)/d (.‐HR) = 1.08, whereas d(logkexp)/d (‐H0) ∼ 2.0. The apparent activation energy for the dealkylation reaction decreases from 34.0 kcal · mole−1in 77.5 wt‐% sulphuric acid to 19.5 kcal · mole−1in 85.8 wt‐% sulphuric acid. Possible mechanisms for the dealkylation reaction are proposed and it is suggested that the C1ring protonation oft‐butylbenzene is gove

ISSN:0165-0513    

DOI:10.1002/recl.19630820604

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractThe formation of polymeric materials from sodium 2,4,5‐trichloro‐ and sodium 2,4,5‐tribromothiophenolates is described. The reaction takes place upon heating the sodium thiophenolates in high‐boiling solvents. So far no evidence is available for the structures of these p

ISSN:0165-0513    

DOI:10.1002/recl.19630820605

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractA series of l‐(2‐dialkylaminoethyl)‐x‐methoxy‐benzimidazoles has been synthesised. Two of these compounds are the O‐methylated benzimidazole analogues of psilocine and of

ISSN:0165-0513    

DOI:10.1002/recl.19630820606

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19630820607

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractThe thermal decomposition of some 1‐ethoxyvinyl esters is described. The first step of the decomposition is rearrangement to a β‐keto ester, the enolic form of which is subsequently acylated by the 1‐ethoxyvinyl

ISSN:0165-0513    

DOI:10.1002/recl.19630820608

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractUsing the doubleMichaelcondensation technique with divinyl ketone recently described1, as well as the dialkylation method2, we have prepared the compounds I, II and III. No syntheses of linear dispiro‐ and trispiro‐hydrocarbons embodying the 6‐membered carbocyclic ring only, have yet been reported3,

ISSN:0165-0513    

DOI:10.1002/recl.19630820609

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractIn this paper experiments are described in which tin and lead are used as selective catalysts for the synthesis of methyltrichlorosilane (80‐90% yield) and methyldichlorosilane (72% yield), respectively. For the methyltrichlorosilane synthesis, the reaction velocity is given as a function of temperature and conversion of methyl chloride at atmospheric pressur

ISSN:0165-0513    

DOI:10.1002/recl.19630820610

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractTransbromination of chlorobenzene and of toluene with bromobenzene under the influence of aluminium bromide‐[82Br] is accompanied by some bromine exchange between organic and inorganic bromides. However, since many bromine atoms aretransferredfor every bromine atomexchangingwith the catalyst, the bromine atoms present in the brominating species (e.g. Br⊕Al2Br7⊖) are not in a state of rapid equilibration. The ratio of transfer and exchange is appreciably greater for toluene than for chlorobenzene as the acc

ISSN:0165-0513    

DOI:10.1002/recl.19630820611

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY