| 1. |
CC Bond Formation by Addition of Carbenium Ions to Alkenes: Kinetics and Mechanism |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1371-1384
Herbert Mayr,
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摘要:
AbstractThe addition of carbenium ions to CC double bonds, a key step in many syntheses in organic and macromolecular chemistry, is analyzed using the Lewis acid promoted reactions of alkyl chlorides with alkenes as an example. Stereochemical and kinetic experiments suggest that the transition state is slightly bridged and product‐like. Rearrangements of the carbenium ions that result from the electrophilic attack can be minimized by adding salts with nucleophilic counter ions. The thermodynamics of the addition reactions are analyzed, and the conditions necessary in order to observe the back reaction (i.e. the Grob fragmentation) are discussed. Multiparameter equations that predict rate constants are derived from kinetic studies on the reactivities of carbenium ions and alkenes. Reactivity‐selectivity relationships over a reactivity range that covers eight orders of magnitude show that the structure of the transition state is only changed by variation of substituents in the immediate vicinity of the reaction cen
ISSN:0570-0833
DOI:10.1002/anie.199013713
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 2. |
Acetylene‐Cumulene Porphyrinoids |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1385-1387
Norbert Jux,
Peter Koch,
Hans Schmickler,
Johann Lex,
Emanuel Vogel,
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ISSN:0570-0833
DOI:10.1002/anie.199013851
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 3. |
Porphyrin Homologues: [22]Porphyrin(2.2.2.2), a “Stretched Porphycene” |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1387-1390
Emanuel Vogel,
Norbert Jux,
Eduardo Rodriguez‐Val,
Johann Lex,
Hans Schmickler,
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ISSN:0570-0833
DOI:10.1002/anie.199013871
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 4. |
Isocorroles: Novel Tetrapyrrolic Macrocycles |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1390-1393
Stefan Will,
Afssaneh Rahbar,
Hans Schmickler,
Johann Lex,
Emanuel Vogel,
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ISSN:0570-0833
DOI:10.1002/anie.199013901
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 5. |
Synthesis of a Bisvinylogous Octaethylporphyrin |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1393-1395
Hartmann König,
Christian Eickmeier,
Manfred Möller,
Ute Rodewald,
Burchard Franck,
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ISSN:0570-0833
DOI:10.1002/anie.199013931
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 6. |
[22]Coproporphyrin II for Photodynamic Therapy |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1395-1397
Stefan Beckmann,
Thomas Wessel,
Burchard Franck,
Wolfgang Hönle,
Horst Borrmann,
Hans‐Georg von Schnering,
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ISSN:0570-0833
DOI:10.1002/anie.199013951
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 7. |
GeIIand SnIIComplexes of [2.2.2]Paracyclophane with Threefold Internal η6Coordination |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1397-1398
Thomas Probst,
Oliver Steigelmann,
Jürgen Riede,
Hubert Schmiclbaur,
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ISSN:0570-0833
DOI:10.1002/anie.199013971
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 8. |
Assembly of the [CAu6]2⊕Cluster with a Tailor‐made Diphosphane Spanning the Octahedral Edges |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1399-1400
Oliver Steigelmann,
Peter Bissinger,
Hubert Schmidbaur,
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ISSN:0570-0833
DOI:10.1002/anie.199013991
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 9. |
Amine‐Template‐Directed Synthesis of Cyclic Porphyrin Oligomers |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1400-1403
Harry L. Anderson,
Jeremy K. M. Sanders,
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ISSN:0570-0833
DOI:10.1002/anie.199014001
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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| 10. |
Synthesis and Structure of [Et2OZn(SC6H2tBu3)2], the First T‐Shaped Zinc Complex |
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Angewandte Chemie International Edition in English,
Volume 29,
Issue 12,
1990,
Page 1403-1404
Philip P. Power,
Steven C. Shoner,
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PDF (253KB)
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ISSN:0570-0833
DOI:10.1002/anie.199014031
出版商:Hüthig&Wepf Verlag
年代:1990
数据来源: WILEY
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