摘要:

AbstractThe crystal structure of diphenyl disulfone has been determined by X‐ray diffraction at room temperature. Observed (average) values for the bonds involving a sulfur atom are: S  S  2.193(1), SO  1.428(1), SC  1.753(1) Å. In parentheses the standard deviations for the individual b

ISSN:0165-0513    

DOI:10.1002/recl.19720910202

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

摘要:

Abstract2‐ and 4‐Cyanomethylpyridine, 1‐methyl‐ and 1‐benzyl‐2‐cyanomethylimidazole and 3‐cyanomethyl‐1,2,4‐triazole lose the cyano group on reaction with aqueous hydrazine at about 200°, yielding α‐ and γ‐picoline, 1,2‐dimethyl‐ and 1‐benzyl‐2‐methylimidazole and 3‐methyl‐1,2,4‐triazo

ISSN:0165-0513    

DOI:10.1002/recl.19720910203

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19720910204

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

摘要:

Abstract3,4‐Dialkylthiophenes are formed in good yields by heating di(1‐alkenyl) disulfides at 150‐200° in the presence of potassium hydrogen sulfate. Thermolysis of alkyl 1‐propenyl disulfides gives mixtures of sulfur‐containing compounds, consisting mainly of 3,4‐dimethylthiophene, dialkyl disulfide, alkyl and 1‐alkenyl monosulfides, and dial

ISSN:0165-0513    

DOI:10.1002/recl.19720910205

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

摘要:

AbstractWhen benzene is refluxed with aluminium chloride one of the products formed after autoxidation is a crystalline ketone. This ketone has been identified as 1‐phenyl‐1,3‐propano‐2‐indanone by a five‐step synthesis starting from l‐phenyl‐2‐indanone. Elimination reactions from intermediate Br‐substituted cyclohexanone derivatives, and a photoelimination from a substituted 2‐i

ISSN:0165-0513    

DOI:10.1002/recl.19720910206

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19720910207

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

摘要:

Abstract2,5‐Dioxo‐1,2,5,6,7,8‐hexahydroquinoline2is formed upon condensation of methyl propiolate with ketone1in DMF as solvent. On the other hand, reaction1with propargylic acid led to 1,8‐dioxo‐perhydroacridine4bas the sole isolabl

ISSN:0165-0513    

DOI:10.1002/recl.19720910208

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19720910209

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

摘要:

AbstractOrtho‐deuteration (with respect to thepara‐substituent) in the phenyl ring at the saturated carbon atom enables one to assign completely the PMR spectra of tetra‐arylcyclobutenyl cations. By this method it was confirmed that the other three phenyl rings bear part of the positive charge and must be conjugated with the cyclobutenyl ring. The cyclobutenyl cations formed from13C‐enriched acetylenes were prepared and the13C‐shifts were correlated with the charge on the carbon atoms. The experimental charges thus obtained allowed different models for calculation by the SCF method to be tested. The calculations indicated that the one‐centre core integrals had to be adjusted as a result of a hybridization which is deshielding with respect to benzene, caused by the angle of 90° in the cyclo

ISSN:0165-0513    

DOI:10.1002/recl.19720910210

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY

摘要:

AbstractA number of new perchlorate complexes of the ligands hexamethylphosphoramide and nonamethylimidodiphosphoramide is reported.The compounds are characterized and identified by chemical analysis and physical measurements.A number of complexes which were reported earlier by other workers, were reprepared and their properties were studied with the aid of X‐ray powder measurements, infrared and ligand‐field spectra. In some cases this leads to quite different conclusions, which are supported by the results found for the new complexes.The raman spectrum of nonamethylimidodiphosphoramide is reported for the first time and it is shown that this facilitates the assignment of absorption bands in the complexes.It is pointed out that planarity of the six‐membered ring, which is in some way suggested by infrared and raman measurements might explain the unusual stability of complexes with the ligand nonamethylimidodiphosphor

ISSN:0165-0513    

DOI:10.1002/recl.19720910211

出版商:WILEY‐VCH Verlag    

年代:1972

数据来源: WILEY