摘要:

Abstract1,2,5‐Thiadiazolo[3,4‐b]‐ and 1,2,5‐thiadiazolo[3,4‐c]‐pyridines have been synthesized from the appropriate diaminopyridines and thionyl chloride. Ring closure of the diamines with selenious acid gave the corresponding selenadiazo

ISSN:0165-0513    

DOI:10.1002/recl.19700890102

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractHindered rotation around the S2CNR2bond ofN,N,N′,N′‐tetra‐alkylthiuram disulfides is observed by NMR. The assumption that oxidation of bis‐dithiocarbamato complexes of Zn, Cd and Hg yield thiuram disulfide complexes of these metals is confirmed by the NMR spectra which reveal a magnetic non‐equivalence of theN‐alkyl groups. It is proposed that the metals in these complexes are tetrahedrally surrounded by two halogen and t

ISSN:0165-0513    

DOI:10.1002/recl.19700890103

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractA convenient synthesis of adamantane‐2‐carboxylic acid and (2‐adamantyl)‐acetic acid starting with adamantanone is de

ISSN:0165-0513    

DOI:10.1002/recl.19700890104

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractThe preparation of solutions of the three simplest ketenes containing the adamantane moiety is described. Initial studies show significant differences in their chemical behaviour, especially with respect to their tendency to polymerize.

ISSN:0165-0513    

DOI:10.1002/recl.19700890105

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractBase‐catalysed isomerization oftrans‐3‐methoxy‐1‐phenylpropene (A) yields stereospecifically as the initial productcis‐1‐methoxy‐3‐phenylpropene (B). This is caused by the (intermediate) formation of thecis‐1‐methoxy‐trans‐3‐phenylallyl anion (II‐1), which is energetically favoured over thetrans‐isomeric anion (I). The NMR spec

ISSN:0165-0513    

DOI:10.1002/recl.19700890106

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractThe mechanism of the title reaction is discussed. The NMR spectra of the 1‐methyl‐ and 1,3‐dimethyl‐1‐phenylallyl and of the 3‐methyl‐ and 1,3‐dimethyl‐oxapentadienyl

ISSN:0165-0513    

DOI:10.1002/recl.19700890107

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractA number of solvates having the general formula M(CH3CN)m(M′Br4)nis reported. In this formula M = Cu(I), or one of the divalent ions Mg, Ca, Mn, Fe, Co, Ni, Cu, Zn, Cd; m is 4 or 6; M′ = Al, Fe, In, Tl; and n = 1 or 2.The compounds are prepared by bromide‐ion transfer reactions between MBr2(or CuBr) and M′Br3in anhydrous acetonitrile.Characterization and identification of these solvates were performed with the aid of chemical analyses, infrared spectra, ligand‐field spectra and X‐ray powder diagrams.The M′Br4−anions are demonstrated to be tetrahedrally co‐ordinated, whereas the M(CH3CN)62+cations are octahedrally co‐ordinated with nitrogen as the

ISSN:0165-0513    

DOI:10.1002/recl.19700890108

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractThe protonation rate constants of the mononegative ions of the di‐aza aromatics with water are obtained from the increase in the diffusion current of the first reduction wave on addition of water to the dimethylformamide (DMF) solution. The rate constant is obtained from an approximate derivation given byHoijtinket al. and from an exact solution given byNicholsonet al. From the dependence of the half‐wave potential on the water concentration, it is shown that the difference between the solvation of the neutral molecules and the mononegative ions is highest for the smallest molecules. Quantumchemical calculations predict a high protonation rate constant for pyrimidine and quinazol

ISSN:0165-0513    

DOI:10.1002/recl.19700890109

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

摘要:

AbstractThe synthesis of the first dithieno[2,3‐b: 2′,3′‐e]‐1,4‐thiazine is described, this compound was prepared by condensation of 3‐thiophenethiol with methyl 2‐bromo‐3‐nitrothiophene‐5‐carboxylate followed by reduction, acylation, bromination with NBS and ringclosure with Cu, K2CO3in nitrobenzene.A thieno‐1,4‐benzothiazine was prepared in the same way. These compounds were synthesized in order to study the suggested correlation between charge‐transfer compl

ISSN:0165-0513    

DOI:10.1002/recl.19700890110

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19700890111

出版商:WILEY‐VCH Verlag    

年代:1970

数据来源: WILEY