摘要:

AbstractVinylthioethyne IV and its derivatives VI (R = CH3orn.C4H9) and VII have been prepared as outlined in the reaction schemes.

ISSN:0165-0513    

DOI:10.1002/recl.19610800302

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractDi(but‐1‐ynyl)sulphide (IV, R = C2H5) and di(prop‐1‐ynyl)sulphide (IV, R = CH3) have been prepared as outlined in the reaction

ISSN:0165-0513    

DOI:10.1002/recl.19610800303

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractAcetylenic compounds RC ≡ CH can be converted into acetylenic thioethers by treatment of the sodium or lithium alkynide with diethyl disulphide in liquid ammonia. This constitutes the easiest route to 1‐ethylthio‐1‐alkynes I.Other compounds with “acidic” CH3, CH2or CH groups can likewise be alkylthiolated; generally the product containing two geminal ethylthio groups is forme

ISSN:0165-0513    

DOI:10.1002/recl.19610800304

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractUV absorption measurements of fuming sulphuric acid solutions of varying composition (3‐60% sulphur trioxide) were made at 25±2°. From these measurements the concentration dependence of sulphur trioxide on acid composition was estimated and compared with calculated sulphur trioxide concentrations assuming the simple equilibriumH2SO4+ SO3⇌ H2S2O7[6].From this comparison it was deduced that K6≥ 5 mole−1·l. The sulphur trioxide concentration in 100% sulphuric acid at 25 ± 2° was calculated with this value for K6to be 8 × 10−5mole·l−1at the most.Evidence is put forward that the activity coefficient of sulphur trioxide is almost independent of the composition of oleum over the

ISSN:0165-0513    

DOI:10.1002/recl.19610800305

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractIn this article on the SX of metal salts by amine salts some formulae have been derived for the distribution ratio D o/a for a metal salt, partitioning between an acidic aqueous layer and an organic phase, containing amine salts.The effects of association of the amine salt, or of the extracted complex or both, are taken into account, as is the effect of the simultaneous extraction of two or more metal salts, the formation of more than one complex per metal salt and the presence of different kinds of anions.The ways, in which formulae may be derived, if two or more active solvents are present in the organic phase at the same time, or when the diluent does not behave inertly, are outlined.

ISSN:0165-0513    

DOI:10.1002/recl.19610800306

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractThe kinetics of the sulphonation of benzenesulphonic acid andm‐toluenesulphonic acid have been measured in oleum, containing 0.7 to 43.6% of sulphur trioxideThe composition of oleum solutions is expressed in the percentage by weight of sulphur trioxide, present in excess of the composition H2SO4. The term concentration will be used for the different species present in oleum Solutions only.at 25°. The reaction is first order with respect to the sulphonic acid. The kinetics are shown to be consistent with the sulphonation mechanism proposed byBrand1, in which the reaction proceeds by a stepwise attachment of SO3and H+to the substrate, followed by the loss of a proton from the benzene ring.Sulphonation of the protonated sulphonic acid cannot be ruled out. Its contribution to the total rate of sulphonation is regarded as small in view of its electrophilic natu

ISSN:0165-0513    

DOI:10.1002/recl.19610800307

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19610800308

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

Abstract4‐Chloropyridine reacts with primary and secondary amines with the formation of substituted 4‐aminopyridines. Amongst tertiary amines it reacts only with pyrid

ISSN:0165-0513    

DOI:10.1002/recl.19610800309

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractThe synthesis of a series of compounds resembling in some respects the alkaloid reserpine is described. The compounds are β‐indolylethylamine (tryptamine) derivativ

ISSN:0165-0513    

DOI:10.1002/recl.19610800310

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY

摘要:

AbstractThe reaction mixture formed during the heating of pyridine‐N‐oxide withp‐toluenesulphonyl chloride contains, together with pyridine, 2,3′‐dipyridyl ether, 3‐pyridylp‐toluenesulphonate and N‐(2Prime;‐pyridyl)‐pyridone‐2 two chloro compounds, viz. N‐(2′‐pyridyl)‐5‐chloro‐pyridone‐2, which is the chief product, and N‐(2′‐pyridyl)‐3‐chloro‐pyridone‐2.In this connection the formation of brominated derivatives of N‐(2′‐pyridyl)‐pyridone‐2 during the reaction of pyridine‐N‐oxide and 2‐

ISSN:0165-0513    

DOI:10.1002/recl.19610800311

出版商:WILEY‐VCH Verlag    

年代:1961

数据来源: WILEY