摘要:

AbstractInvestigations carried out during the last six years have shown that, as in the case of benzene, an extra bond can be introduced into heteroaromatic rings. Since this possibility does not appear to be confined to exceptional cases, the heterocyclic arynes (hetarynes) promise a much wider variety than the carbocyclic arynes. Hetarynes occur mainly as intermediates in nucleophilic substitutions on halogenated heterocyclic compounds. Since the replacement of a CH group in dehydrobenzene by a nitrogen atom and the condensation of benzene rings have stabilizing effects, the stability of hetarynes is expected to increase with the number of N atoms and with the number of condensed aromatic rings.

ISSN:0570-0833    

DOI:10.1002/anie.196505431

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractIn addition to catabolic and anabolic pathways, which enable nutrients to enter and to be withdrawn from the central routes of metabolism, enzymic sequences operate to ensure that intermediates, removed from these central routes in the course of biosynthesis, are replenished. These obligatory pathways of replenishment are generically designated “anaplerotic sequences”. The nature of these sequences, operative in micro‐organisms growing on C3‐ and C2‐compounds, is discussed in outline, and the mode of regulation of one of them (the glyoxylate cycle) is examined

ISSN:0570-0833    

DOI:10.1002/anie.196505581

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractAs a result of the development of very sensitive equipment, it is now possible to show that the chemiluminescence of organic compounds in solution is quite a common phenomenon. Notable advances have been made during recent years in the investigation of the chemiluminescence of substituted phthalic acid hydrazides and related compounds. A new and probably generally applicable method of producing chemiluminescence has recently been discovered in the reaction of aromatic free‐radical anions with appropriate free‐radical cati

ISSN:0570-0833    

DOI:10.1002/anie.196505661

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractThe open‐chain chelate structure of sugar osazones, first proposed by Fieser and Fieser, has now been confirmed by chemical methods, X‐ray analysis, and NMR spectroscopy. These investigations showed that the properties of sugar osazones are best described by a formula containing a quasi‐aromatic chelate

ISSN:0570-0833    

DOI:10.1002/anie.196505741

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractPhosphonium salts may be regarded as Bronsted acids, and alkylidenephosphoranes as the conjugate bases. Compounds of the two classes exist in equilibrium with each other. Phosphonium salts and alkylidenephosphoranes can be obtained by this “transylidation”. Other methods are also given for the preparation of members of both clas

ISSN:0570-0833    

DOI:10.1002/anie.196505831

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

摘要:

AbstractThe “classical” definition of liquid and solid phases acording to mechanical criteria is unsatisfactory. It is now know that “premelting” effects occur in crystals, and in many liquids the formation of clusters is observed near the melting point, with structures which can correspond to the short‐range order of the crystals from which the melt is derived.–In particular, the implications of the theories of Lennard‐Jones and Devonshire and of Mizushima and Ookawa

ISSN:0570-0833    

DOI:10.1002/anie.196505871

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196505923

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196505931

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196505942

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196505951

出版商:Hüthig&Wepf Verlag    

年代:1965

数据来源: WILEY