ZIB

Digitale Medien

Proton Transfer, Acid-Base Catalysis, and Enzymatic Hydrolysis. Part I: ELEMENTARY PROCESSESPart II (Catalytic Mechanisms) will appear shortly in this journal.Dedicated to Dr. W. Foerst on the occasion of his 65th birthday (1964)

Eigen, M.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 3 (1964), S. 1-19

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0570-0833

Schlagwort(e): Proton transfer ; Catalysis ; Enzyme catalysis ; Hydrolysis ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The proton occupies a special position as a promoter and mediator in chemical reactions occurring in solution. Many reactions in organic chemistry are catalysed by acids or bases; likewise, most enzymes contain active groups which promote acid-base catalysis. To understand the reaction mechanisms involved, it is necessary to identify the elementary steps as well as their course in time. Systematic investigation of these elementary steps as well as their course in time. Systematic investigation of these elementary steps has become possible only with the development of new methods for studying very fast reactions. The present paper reviews the information obtained in this type of investigation. The result is a relatively complete picture of the elementary proton transfer mechanisms and a comprehensive description of the modes and laws of acid-base and enzymatic catalysis.

Zusätzliches Material: 12 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196400011

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

The Mechanism of the Action of Organometallic CatalystsDedicated to Prof. Dr. Karl Winnacker on the occasion of his 60th birthday. (1964)

Sinn, H. ; Patat, F.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 3 (1964), S. 93-101

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0570-0833

Schlagwort(e): Organometallic catalysts ; Catalysis ; Reaction mechanisms ; Lithium ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Kinetic investigations of the polyreaction of isoprene with organolithium compounds as initiators in n-heptane as solvent indicate the following sequence of reactions: 1. formation of an adduct between a monomeric form of the organolithium compound and the isoprene and 2. reaction of this adduct with an associated form of the organolithium compound with insertion of the isoprene. The adduct formation is considered to be due to chemisorption, and proof of such chemisorption of a monomer (ethylene) is also demonstrated for a homogeneous Ziegler-type catalyst. All the reactions can be formulated in the form of cyclic structures with electron-deficient character. Postulation of such ring structures explains the surprising values obtained for the frequency factors and equilibrium constants.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196400931

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Coordination Chemistry and Catalysis. Investigations on the Synthesis of Cyclooctatetraene by the Method of W. Reppe (1964)

Schrauzer, G. N. ; Glockner, P. ; Eichler, S.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 3 (1964), S. 185-191

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0570-0833

Schlagwort(e): Coordination modes ; Catalysis ; Cyclooctatetraenes ; Reppe chemistry ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The relationship between the structure and the catalytic activity of nickel(II) complexes in the synthesis of cyclooctatetraene by the method of W. Reppe is discussed. The cyclotetramerization of acetylene takes place within labile Ni(II)-acetylene π-complexes. Inhibition tests have made it probable that four molecules of acetylene are grouped around the nickel ion in the transition state, in a configuration which favors the formation of the eight-membered ring.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196401851

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Organosodium and Organopotassium Compounds Part I: Properties and ReactionsFor earlier reviews see [1a-1g]. (1964)

Schlosser, M.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 3 (1964), S. 287-306

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0570-0833

Schlagwort(e): Organopotassium compounds ; Organosodium compounds ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 7 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196402871

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Organosodium and Organopotassium Compounds. Part II: Preparation and Synthetic ApplicationsPart I: Properties and Reactions: M. Sclilosser, Angew. Chem. 76, 124 (1964); Angew. Chem. internat. Edit. 3, 287 (1964). (1964)

Schlosser, M.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 3 (1964), S. 362-373

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0570-0833

Schlagwort(e): Organopotassium compounds ; Organosodium compounds ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A selection of well established procedures for the preparation of the most common organosodium and organopotassium compounds is given. The wide synthetic applicability of organoalkali-metal compounds is shown by means of examples. Unlike Part I, Part II deals not only with “true”organoalkali compounds, but also with salt-like compounds such as sodium acetylides and sodiocarboxylic esters, since these posses considerable preparative value.

Zusätzliches Material: 8 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196403621

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Treffer 1 - 5 | 5 Treffer