Výsledky vyhledávání - "Carin Engdahl"

Long-range deuterium isotope effects on13C NMR shifts of intramolecularly hydrogen-bonded 9-hydroxyphenalen-1-ones

Autor: Ulf Edlund, Carin Engdahl, Adolf Gogoll

Publikováno v: Magnetic Resonance in Chemistry. 29:54-62

The 1H and 13C NMR spectra of 9-hydroxyphenalenone (1) and 9-hydroxy-2-methylphenalenone (2) have been completely assigned. Primary and secondary deuterium isotope effects were determined in three solvents (chloroform, acetone and dimethyl sulphoxide

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8301f2386b6e76ca27a135ce398b2aa4
https://doi.org/10.1002/mrc.1260290112

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A study of a novel degenerate carbocation rearrangement of the 4,9-dimethyl-9-barbaralyl cation by dynamic13C and1H NMR spectroscopy in superacid

Autor: Carin Engdahl, Per Ahlberg

Publikováno v: Journal of Physical Organic Chemistry. 3:349-357

The 4,9-dimethyltricyclo [3.3.1.02,8]nona-3,6-dien-9-yl (4,9-dimethyl-9-barbaralyl) cation (3) was generated from 4,9-dimethyl-9-barbaralol (5) at −135°C in two different superacid mixtures [FSO3HSO2CIFSO2F2(1:6:1) and FSO3HSO2CIFSO2F2CHCl2 (2:10:

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6a3947abcc78b6dcc7297959872e9ed
https://doi.org/10.1002/poc.610030602

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13C Spin Saturation Transfer Measurements on Protonated Aromatic Ethers. The Torsional Barrier Around the Phenyl-Alkoxy Bond

Autor: Jean Sommer, Svein Samdal, Roland Jost, Carin Engdahl

Publikováno v: Acta Chemica Scandinavica. 43:888-892

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e39c93d7a8f9340787dcf2c8487fdb2e
https://doi.org/10.3891/acta.chem.scand.43-0888

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Carbon-13 NMR chemical shifts and transfer of carbon-13 spin saturation and the structures and rearrangements of 9-barbaralyl cations, protonated barbaralone, and barbaralone

Autor: Carin Engdahl, Per Ahlberg

Publikováno v: Journal of the American Chemical Society. 101:3940-3946

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43b4d402fd28aaa9f0984172ac62decd
https://doi.org/10.1021/ja00508a037

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The totally degenerate (CH)9+ ion 9-barbaralyl cation studied by carbon-13 labeling and isotopic perturbation by eight deuteriums

Autor: Carin Engdahl, Goeran Jonsaell, Per Ahlberg

Publikováno v: Journal of the American Chemical Society. 105:891-897

There has been controversy regarding the structure and mechanisms of rearrangement of the totally degenerate (CH)/sub 9//sup +/ carbocation 1 obtained from bicyclo(3.2.2)nona-3,6,8-trien-2-ol (2) in superacid. Ion 1 appears as a sharp singlet in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23d71fe013bc28428dae4e3aa25754ae
https://doi.org/10.1021/ja00342a042

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Methoxy group rotation in alkylanisyl carbenium ions as a probe of the relative charge delocalization abilities of phenyl, cyclopropyl, and methyl groups

Autor: Jean Sommer, Carin Engdahl, Per Ahlberg, Roland Jost

Publikováno v: Journal of the American Chemical Society. 102:7663-7667

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::114c83ea429a4d8287ad2105f9b3fc03
https://doi.org/10.1021/ja00546a007

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ChemInform Abstract: METHOXY GROUP ROTATION IN ALKYLANISYL CARBENIUM IONS AS A PROBE OF THE RELATIVE CHARGE DELOCALIZATION ABILITIES OF PHENYL, CYCLOPROPYL, AND METHYL GROUPS

Autor: Carin Engdahl, Jean Sommer, Per Ahlberg, Roland Jost

Publikováno v: Chemischer Informationsdienst. 12

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b7a6cf31c6739da9cdd6b06a7da92817
https://doi.org/10.1002/chin.198112084

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13C labelled barbaralyl cation: a non-classical, totally degenerate carbocation

Autor: Carin Engdahl, Göran Jonsäll, Per Ahlberg

Publikováno v: J. Chem. Soc., Chem. Commun.. :626-627

The pulse Fourier transform 13C n.m.r. spectra at –135·5 and –150 °C of the 13C-labelled barbaralyl cation in superacid show that it has a rapidly rearranging 9-barbaralyl cation structure and/or one with D3h symmetry.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a16325ff358001dab5700d5870ac7bd7
https://doi.org/10.1039/c39790000626

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