| 1. |
Graphical Abstract (Angew. Chem. Int. Ed. Engl. 11/1994) |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1123-1127
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ISSN:0570-0833
DOI:10.1002/anie.199411231
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 2. |
Are Polar Organometallic Compounds “Carbanions”? The Gegenion Effect on Structure and Energies of Alkali‐Metal Compounds |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1129-1140
Christoph Lambert,
Paul von Ragué Schleyer,
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摘要:
AbstractPolar organometallic compounds such as alkyllithium compounds or Grignard reagents often are conceived as “carbanions”, although it is well known from experiments that the metal gegenions may have a strong, and often directing, influence on the reactivity (for example, the basicity vs. the nucleophilicity) of the “carbanion”. This demonstrates that “carbanions” are tightly associated ion pairs, at least in commonly used less polar or nonpolar solvent systems like ethers or hydrocarbons. However, despite about ninety years of widespread application of these organometallic compounds as bases or nucleophilic reagents, the role of the gegenion is not yet understood fully. The focus of this review is on the inherent influences of the metal gegenion on the structures, reaction energies, and activation barriers of some representative alkali‐metal compounds. While most comparisons of physical and chemical properties determined experimentally for Group I compounds are precluded due to different substituents, solvents, ligands, etc., ab initio calculations of model compounds can yield intrinsic data that are useful for a better understanding of chemical behavior. For this reason, most of the data reviewed in this article are based on quantum chemical calculations, which are compared with experimental data wh
ISSN:0570-0833
DOI:10.1002/anie.199411291
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 3. |
Binuclear Metal Complexes as Efficient Intermediaries in Biochemically Relevant Hydrolysis Reactions |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1141-1143
Michael W. Göbel,
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ISSN:0570-0833
DOI:10.1002/anie.199411411
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 4. |
New Total Syntheses of Strychnine |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1144-1149
Uwe Beifuss,
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ISSN:0570-0833
DOI:10.1002/anie.199411441
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 5. |
Tetraoxa[22]porphyrin(2.2.2.2) Dication and Tetraoxa[24]porphyrinogens(2.2.2.2) |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1151-1153
Gottfried Märkl,
Heinrich Sauer,
Peter Kreitmeier,
Thomas Burgemeister,
Fritz Kastner,
Georg Adolin,
Heinrich Nöth,
Kurt Polborn,
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ISSN:0570-0833
DOI:10.1002/anie.199411511
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 6. |
3H‐Indole |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1153-1156
Ivo G. Gut,
Jakob Wirz,
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ISSN:0570-0833
DOI:10.1002/anie.199411531
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 7. |
Synthesis, Structures, and Reactions of Two Bis(diaminostannylene)s and a Bis(diaminogermylene) Containing a Central C6Ring |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1156-1158
Holger Braunschweig,
Peter B. Hitchcock,
Michael F. Lappert,
Luc J.‐M. Pierssens,
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ISSN:0570-0833
DOI:10.1002/anie.199411561
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 8. |
Toward Polyphospholes: Synthesis and Structure of an α‐Linked Quaterphosphole |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1158-1161
Eliane Deschamps,
Louis Ricard,
François Mathey,
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ISSN:0570-0833
DOI:10.1002/anie.199411581
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 9. |
The Oxenoid Character of Metalated Hydroperoxides O(M)OR: Oxidation of Organometallic Compounds R′M′ to R′OH under Mild Conditions |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1161-1163
Gernot Boche,
Ferdinand Bosold,
John C. W. Lohrenz,
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ISSN:0570-0833
DOI:10.1002/anie.199411611
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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| 10. |
Sensitive and Selective Coloration of Cryptand‐Type Crown Spirobenzopyrans for Alkaline‐Earth Metal Cations |
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Angewandte Chemie International Edition in English,
Volume 33,
Issue 11,
1994,
Page 1163-1166
Masahiko Inouye,
Yoshiyuki Noguchi,
Kakuzo Isagawa,
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ISSN:0570-0833
DOI:10.1002/anie.199411631
出版商:Hüthig&Wepf Verlag
年代:1994
数据来源: WILEY
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