摘要:

AbstractThe intramolecular 1,3‐dipolar cycloaddition reaction of suitably functionalized 1,3‐dipoles represents a general scheme for the synthesis of novel fused ring heterocycles. Such reactions of a number of 1,3‐dipoles are summarized and the general outline and potential analogies for these reactions noted. While the immediate aim of this review is to survey and correlate published work, it is hoped that general and specific points in need of study will be revealed and will stimulate further work in this fertile

ISSN:0570-0833    

DOI:10.1002/anie.197601231

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractAn evaluation of literature data concerning the production of hydrocarbons and alcohols by the Fischer‐Tropsch procedure indicates that the molecular weight distribution of the primary products can be described by the Schulz‐Flory equation (“normal” or “most probable” distribution). It follows that the highest attainable selectivity for a given molecular weight range can be calculated. A reaction mechanism i

ISSN:0570-0833    

DOI:10.1002/anie.197601361

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractEnvironmental analyses show that the air which we breathe, and which is so essential to life, is in general a mixture of gaseous, liquid, and solid components. The solid airborne particles, whose concentration, homogeneity, chemical composition, size, and shape can vary over wide ranges, and whose origin may be “natural” or “artificial” are referred to as “dust”. Dust particles can act,inter alia, as condensation nuclei, catalysts, and directly as hazardous materials. Unfortunately, we still know far too little about dust. Dust analysis is extremely difficult and challenging, even for modern analytical chemistry; it is still far from being fully automated. The simultaneous determination of as many “dust parameters” as possible, and particularly the synoptic consideration of all available data against a background of physicochemical and technological knowledge on the development, transformation, and effects of dust, are summarized as “integrat

ISSN:0570-0833    

DOI:10.1002/anie.197601411

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractCatalyzed reactions are becoming increasingly improtant in analytical chemistry, and especially in trace analysis. The acceleration of a particular reaction (indicator reaction) promoted by the catalyst provides information about the catalyst concentration. Substances which lower or raise the activity of a catalyst (inhibitors or activators, respectively) can likewise be determined in this way. The course of a reaction is usually monitored by physical measuring techniques. Various methods of conducting these kinetic‐catalytic studies are discussed in this article.—Use of catalyzed reactions for end point detection in volumetric analysis is also feasi

ISSN:0570-0833    

DOI:10.1002/anie.197601501

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.197601571

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.197601582

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.197601591

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.197601601

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.197601611

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.197601622

出版商:Hüthig&Wepf Verlag    

年代:1976

数据来源: WILEY