Organocobalt cluster complexes. XIII. Nuclear magnetic resonance spectroscopic evidence concerning the stabilization of (nonacarbonyltricobalt)carbon substituted carbonium ions

1974 ◽  
Vol 96 (2) ◽  
pp. 604-606 ◽  
Author(s):  
Dietmar Seyferth ◽  
Gary H. Williams ◽  
Daniel D. Traficante
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spectroscopic Evidence ◽  
Cluster Complexes ◽  
Carbonium Ions ◽  
Nuclear Magnetic

Stable Carbonium Ions. X.1Direct Nuclear Magnetic Resonance Observation of the 2-Norbornyl Cation

1964 ◽  
Vol 86 (24) ◽  
pp. 5679-5680 ◽  
Author(s):  
Paul von R. Schleyer ◽  
William E. Watts ◽  
Raymond C. Fort ◽  
Melvin B. Comisarow ◽  
George A. Olah
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Carbonium Ions ◽  
Nuclear Magnetic

ORMOSIA ALKALOIDS: III. CHEMISTRY OF ORMOSANINE AND ORMOJANINE; DEHYDROGENATION TO 3,6,8-TRIALKYLATED QUINOLINES

1966 ◽  
Vol 44 (21) ◽  
pp. 2525-2538 ◽  
Author(s):  
Z. Valenta ◽  
P. Deslongchamps ◽  
M. H. Rashid ◽  
R. H. Wightman ◽  
J. S. Wilson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Study ◽  
Catalytic Dehydrogenation ◽  
Mechanism Of Formation ◽  
Magnetic Resonance Study ◽  
Spectroscopic Evidence ◽  
Related Alkaloid ◽  
Nuclear Magnetic

Degradations of ormosanine, C20H35N3, are described which are in agreement with structure II (8) for this alkaloid. Nuclear magnetic resonance study of N-acetyl and N-nitroso derivatives has been used to clarify the environment of the secondary nitrogen atoms. Chemical and spectroscopic evidence leads to the formulation XVb for the related alkaloid ormojanine, C20H31N3.Both alkaloids were found to give 3-n-pentyl-6,8-dipropylquinoline together with the corresponding 3-n-butyl derivative in a catalytic dehydrogenation. The possible mechanism of formation of these dehydrogenation products is discussed and their synthesis is described.

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