摘要:

The reactions of sulfilimines with TCNQ were undertaken to investigate the electronic structure of the sulfilimine. The reaction of ylide bond (S = N) of sulfilimine with the multiple bonds (C = C or C ≡ N of TCNQ does not occur, but new charge-transfer complexes were formed as products. The molar ratio of the sulfilimine and TCNQ in new charge-transfer complex I was 1:1.3. This ratio was determined by elemental analyses. The results of various thermal analyses indicated that these complexes do not have definite melting points. The reason for this result is that the sulfilimine is instabilized by the weakened ylide bond in the complex, because IR data showed that the electron transfer from ylide bond to TCNQ in the complex occurs and as a consequence, the bond strength of ylide bond is weakened. ESR measurements of various sulfilimine-TCNQ complexes were performed. It was also clarified from the measurements of conductivities that the behaviors of conductivity of new complexes are similar to those of typical charge-transfer complexes.

ISSN:1058-725X    

DOI:10.1080/10587259808042446

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Simulation of calorimetric fusion curves was introduced as a new technique in calorimetric purity analysis and has now been tested for its applicability to enantiomeric purity determination. The system investigated was the enantiomeric pair (S)-(+)-1-Indanol/(R)-(-)-1-Indanol. The racemic form of this system either exists as a conglomerate or as a racemic compound. The binary fusion diagrams of both forms of enantiomeric mixtures were built up from melting investigations and were compared with calculations. The results obtained show that the simulation method is suitable to determine enantiomeric purities by an accuracy of better than 10% within a concentration range 80… 100%eewhich is the important range for purity analysis.

ISSN:1058-725X    

DOI:10.1080/10587259808042447

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

“Aspects of Organic Chemistry-Structure”by Gerhard Quinkert, Ernst Egert, Christian Griesinger; published jointly by Verlag Helvetica Chimica Acta, Basel and VCH, Weinheim, 1996, ISBN 3-906390-15-2; DM 148.00.

ISSN:1058-725X    

DOI:10.1080/10587259808042448

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1058-725X    

DOI:10.1080/10587259808042425

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor