摘要:

AbstractA study was made of the kinetics of formation and decomposition of ethylbenzene‐hydroperoxide in the liquid phase. For a simplified mechanism, a first order decomposition of the hydroperoxide theoretically leads to an oxidation rate proportional to the square root of the hydroperoxide concentration. It is shown that only experiments at low concentration show this proportionality. At higher concentrations not all radicals originated by the thermal decomposition of the hydroperoxide cause chain branching. An extension of the mechanism is proposed and a mathematical form for the kinetics has been drawn‐up. Experiments with molecular oxygen at 120° are in agreement with this formula for the rate equa

ISSN:0165-0513    

DOI:10.1002/recl.19660850602

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractMeasurements of the magnetic susceptibility of Leclanché‐type galvanic cells during electric discharges with γ‐ and β‐MnO2show a different reaction mechanism. Mn2+is formed during the first part of the discharge of γ‐MnO2. This Mn2+remains in the MnO2lattice in solid state. After the catholyte has become alkaline and when a sufficiently great quantity of Mn2+has been formed in the lattice, a second solid phase will appear. With β‐MnO2, forming of a second solid phase seems to start already after the beginn of

ISSN:0165-0513    

DOI:10.1002/recl.19660850603

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractThe crystal structure of bis(1,3‐diphenyl‐1,3‐propanedionato)copper(II), Cu(C6H5CO.CH · COC6H5)2, has been determined with the aid of three‐dimensional X‐ray diffraction data. The dimensions of the monoclinic cell are a = 26.18, b = 6.07, c = 16.64 Å, β = 115.3°,Z= 4, and the space group is C2/c.The copper ion has the square configuration with Cu‐O = 1.91 Å and with valency angles close to 90°. The chelate ring is entirely planar, the phenyl rings make small angles (9.3° and 4.6°) to this plane.There is no indication of extensive conjugation between the phenyl groups and the

ISSN:0165-0513    

DOI:10.1002/recl.19660850604

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

Abstract1‐Alkynyl ethers of the type R‐C≡C‐OR′ (R = H or alkyl and R′ = alkyl) were converted by addition of phosgene into β‐alkoxy‐β‐chloroethene carbonic chlorides RO‐CCl = CR‐CO‐Cl (II). From the adducts some amides were prepared.Hexachloroacetone and chloral reacted with ethoxyethyne without a catalyst to (CCl3)2CCH‐COOC2H5(I) and CCl3CHCHCOOC2H5respectively.Sulfur dichloride already adds on to ethoxyethyne at a low temperature, forming bis(2‐ethoxy‐2‐chlorovinyl) sulfide (VIII), which upon alcoholysis yields b

ISSN:0165-0513    

DOI:10.1002/recl.19660850605

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

Abstract1,4‐Elimination of alkanethiols RSH from the bis‐thioethers RSCH2CCC;H2SR with sodium ethoxide in liquid ammonia at −33°, affords two productsviz.enynyl thioethers CH2CHC≡CSR and dienyl‐bis‐thioethers CH2CH‐C(SR)CHSR resulting from readdition of thiolate. Experimental evidence for the occurrence of cumulenyl thioethers CH2CCCHSR as intermediates in these elimination reactions is described.Reaction of the “mixed” compounds RSCH2C≡CCH2OR′, RSCH2C≡CCH(CH3)OR′ and RSCH2C≡C‐C(CH3)2OR′ with sodium ethoxide at −33° in liquid ammonia results in an elimination of the OR′ [R′ = alkyl or ‐CH(CH3)OC2H5] group and formation respectively of the enynyl thioethers RSC≡CCHCH2, RSC≡CCHCHCH3and a mixture of RSC≡CCHC(CH3)2and the carbinolRSCH≡C(OH)(CH3)] = CCH–CThe carbinol can also be obtaine

ISSN:0165-0513    

DOI:10.1002/recl.19660850606

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractAllenyl thioethers RCHCC(SR″′ )CHR′R″ (R, R′, R″ are H or alkyl: R′″ = alkyl) have been isomerized under the influence of acids into the dienes RC

ISSN:0165-0513    

DOI:10.1002/recl.19660850607

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractPreparation of the optical antipodes of I and of II is described. The absolute configuration of the antipodes is determined, correlating the structures with that ofD(+)paredrine. The musculotropic as well as the neurotropic activities of the antipodes are given.

ISSN:0165-0513    

DOI:10.1002/recl.19660850608

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19660850609

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractNitration of 1,2‐di‐tert.butylbenzene gives, in addition to 4‐nitro‐1,2‐di‐tert.‐butylbenzene, a remarkably high percentage of 3‐nitro‐1,2‐di‐tert.butylbenzene. Upon further nitration of these compounds, 3,5‐dinitro‐1,2‐di‐tert.butylbenzene and 4,5‐dinitro‐1,2‐ditert.butylbenzene are formed from the 4‐nitro derivative, and 3,4‐dinitro‐1,2‐di‐tert.butylbenzene and 3,5‐dinitro‐1,2

ISSN:0165-0513    

DOI:10.1002/recl.19660850610

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractMixed formic acid anhydrides of high purity have been prepared by the action of acyl chlorides on sodium formate in dry tetrahydrofuran.

ISSN:0165-0513    

DOI:10.1002/recl.19660850611

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY