Výsledky vyhledávání - "Jürgen Harbach"

Solid‐State 13 C‐NMR‐Spectroscopy, 3. – Solid‐State 13 C‐NMR‐Spectroscopic Investigations of α‐(Dimethylamino)‐benzyllithium Complexes

Autor: Günther Maier, Hubertus Ahlbrecht, Jürgen Harbach, Andreas Lang, Hans‐Otto Kalinowski

Publikováno v: Chemische Berichte. 130:683-686

α-(Dimethylamino)benzyllithium (1a) and its complexes, 1b–f, have been characterized by their solid-state 13C-NMR spectra. The spectra are comparable to those recorded in solution and can be used to reveal the structures of the different solvates

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b9be85a7b6e2240c76fc6e36d57165b4
https://doi.org/10.1002/cber.19971300603

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Chiral organometallic reagents, XII. On the racemization of α-hetero-substituted benzyllithium compounds

Autor: Hubertus Ahlbrecht, Reinhard W. Hoffmann, Jürgen Harbach, Thomas Ruhland

Publikováno v: Liebigs Annalen. 1995:211-216

Benzyllithium compounds carrying a benzylthio substituent (6), a benzylseleno substituent (8), and an isopropyl(methyl)amino substituent (14) have been generated. Racemization barriers have been determined in THF by monitoring the coalescence of sign

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b75d4fb0ab973e4a8c7d95667694105f
https://doi.org/10.1002/jlac.199519950230

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[α‐(Dimethylamino)benzyllithium–Diethyl Ether] 2 , ( S )‐α‐(Methylpivaloylamino)benzyllithium – (–)‐Sparteine, and [3‐Iodo‐2‐lithio‐1‐methylindole – 2 Tetrahydrofuran] 2 : Crystal Structure Investigations of α‐Lithiated Amines

Autor: Jürgen Harbach, Michael Marsch, Klaus Harms, Frank Schubert, Hubertus Ahlbrecht, John C. W. Lohrenz, Gernot Boche, Burkhard Ledig

Publikováno v: Chemische Berichte. 126:1887-1894

In order to determine whether α-metalated (lithiated) amines are carbenoids, as are α-lithiated halides and ethers, we have determined the crystal structures of the title compounds. In [α-(dimethylamino)benzyllithium–diethyl ether]2 ([9 · OEt2]

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aab792cd1f5bf745adc987e50205a94d
https://doi.org/10.1002/cber.19931260820

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Chiral Organometallic Reagents, VIII. On the Configurational Stability of α-Hetero-Substituted Benzyllithium Compounds

Autor: Thomas Rühl, Reinhard W. Hoffmann, Jürgen Harbach

Publikováno v: Liebigs Annalen der Chemie. 1992:725-730

A test based on kinetic resolution was applied to probe the configurational stability of various α-substituted benzyllithium compounds 1. It was found that the trimethylsilyl- (1b), phenylsulfenyl- (1c), and the phenylselenyl-substituted (1d) benzyl

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https://doi.org/10.1002/jlac.1992199201122

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Struktur von α‐(Dimethylamino)benzyllithium in Lösung: Dynamisches Gleichgewicht zwischen einer η 1 ‐ und einer η 3 ‐Spezies

Autor: Tim Hauck, Jürgen Harbach, Hans‐Otto Kalinowski, Hubertus Ahlbrecht

Publikováno v: Chemische Berichte. 125:1753-1762

Structure of α-(Dimethylamino)benzyllithium in Solution: Dynamic Equilibrium between an η1 and an η3 Species1 Temperature-dependent 1H- and 13C-NMR-spektroscopic shifts observed in tetrahydrofuran are indicative of an equilibrium between a high-te

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d0a8b82faf65ce493f1dc8f4b6249478
https://doi.org/10.1002/cber.19921250730

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