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1H and 13C NMR study of paramagnetic chiral macrocyclic lanthanide complexes.
Autorzy
Rok wydania
1999
Czasopismo
Magnetic Resonance in Chemistry
Numer woluminu
37
Strony
287-294
DOI
10.1002/(SICI)1097-458X(199904)37:4<287::AID-MRC455>3.0.CO;2-%23
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The chiral macrocyclic complexes obtained in a template condensation of (R,R )-1,2-diaminocyclohexane and 2,6-diformylpyridine, [LnL](NO3 )3 , Ln=La(III), Ce(III), Eu(III) and Yb(III), were studied by 1Hand 13C NMR spectroscopy. The signal assignment was based on COSY, NOESY and HMQC measurements and the isotropic shifts of the paramagnetic complexes were analysed. The spectra of the investigated compounds in methanol–chloroform solution indicate a D2-symmetrical, helical conformation of the ligand. The chiral [LnL](NO3 )3 complexes are able to form diastereoisomeric adducts with D- and L-aminoacids that can be distinguished by 1H NMR spectroscopy.
Adres publiczny
https://doi.org/10.1002/(SICI)1097-458X(199904)37:4<287::AID-MRC455>3.0.CO;2-%23
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