Stable carbocations. CXXX. Carbon-13 nuclear magnetic resonance study of halocarbenium ions. Degree of halogen "back-donation" and relative stability of halocarbeniumions

1972 ◽  
Vol 94 (10) ◽  
pp. 3551-3554 ◽  
Author(s):  
George A. Olah ◽  
Y. K. Mo ◽  
Y. Halpern
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Relative Stability ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
Back Donation ◽  
Nuclear Magnetic

Complexes of vanadium(V) with α-hydroxycarboxylic acids studied by 1H, 13C, and 51V nuclear magnetic resonance spectroscopy

1987 ◽  
Vol 65 (10) ◽  
pp. 2434-2440 ◽  
Author(s):  
M. Madalena Caldeira ◽  
M. Luísa Ramos ◽  
Nuno C. Oliveira ◽  
Victor M. S. Gil
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Relative Stability ◽  
Nuclear Magnetic Resonance Study ◽  
Resonance Spectroscopy ◽  
Magnetic Resonance Study ◽  
Hydroxycarboxylic Acids ◽  
Ph Range ◽  
Nuclear Magnetic

A proton, carbon-13, and vanadium-51 nuclear magnetic resonance study is reported on the number, stoichiometry, geometry, and relative stability of the complexes that form when vanadate(V) solutions are mixed with each one of the following organic α-hydroxyacids in the pH range ~2.5 – ~7: glycolic, lactic, chloro-3- and phenyl-3-lactic, mandelic, glyceric, and malic acids. The predominant complexes have 1:1 composition (almost certainly in a polymeric structure) in contrast with the 1:2 (metal:ligand) stoichiometry of the corresponding Mo(VI) and W(VI) complexes.

Barium-137 nuclear magnetic resonance study in the various phases of

1999 ◽  
Vol 11 (3) ◽  
pp. 871-879 ◽  
Author(s):  
A Taye ◽  
G Klotzsche ◽  
D Michel ◽  
S Mulla-Osman ◽  
R Böttcher
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
Nuclear Magnetic
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