HCSE Method for Detection of Small Carbo-Carbon Couplings and Their Signs, Comparison with SLAP Pulse Sequence

0424661 - ÚCHP 2014 RIV GB eng J - Journal Article
Blechta, Vratislav - Schraml, Jan
HCSE Method for Detection of Small Carbo-Carbon Couplings and Their Signs, Comparison with SLAP Pulse Sequence.
Magnetic Resonance in Chemistry. Roč. 51, č. 11 (2013), s. 743-743. ISSN 0749-1581. E-ISSN 1097-458X
R&D Projects: GA TA ČR TA01010646
Institutional support: RVO:67985858
Keywords : coupling sign * HCSE * SLAP
Subject RIV: CC - Organic Chemistry
Impact factor: 1.559, year: 2013

Performance of HCSE experiment applied to detection of signed carbon-carbon couplings is discussed using a set of already measured samples of 9 monosubstituted benzenes. It is shown that coupling sign detection is insensitive to the settings of carbon-carbon polarization transfer delays. The HCSE spectra of 10 from the total of 43 measured carbon-carbon couplings were considerably influenced by relaxations and proton-proton strong couplings. These effects are quantitatively discussed. The results of HCSE and SLAP experiments are compared. It is shown that the two methods may complement each other in detection of signed carbon-carbon couplings.
Permanent Link: http://hdl.handle.net/11104/0230722