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New lanthanide(III) complexes of chiral nonadendate macrocyclic amine derived from (1R,2R)-1,2-diaminocyclohexane and 2,6-diformal-4-methylphenol.
Autorzy
Rok wydania
2008
Czasopismo
Journal of Alloys and Compounds
Numer woluminu
451
Strony
443-447
DOI
10.1016/j.jallcom.2007.04.151
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The series of complexes [LnH4L(NO3)2](NO3)2·nH2O (Ln = La, Ce, Pr, Nd, Gd, Tb, Ho, Er, Tm) of the positively charged protonated form of a chiral macrocyclic amine H4L+, derived from the 3 + 3 condensation product of (1R,2R)-1,2-diaminocyclohexane and 2,6-diformyl-4-methylphenol, have been synthesized. The series of complexes Nax[LnL](X)y(OH)x−y·n(solv) (X = NO3− or Cl−, and Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) of the deprotonated anionic form of the ligand, L3−, have also been synthesised. The complexes have been characterised by elemental analyses, 1H NMR and ESI MS spectra. The X-ray crystal structures of the [LaH4L(NO3)2](NO3)2·5CH3OH and [GdH4L(NO3)2](NO3)2·5CH3OH complexes have been determined. The two complexes are isostructural, and the protonated macrocycle acts as pentadentate ligand. The Ln(III) ion is bound to three phenolate oxygen atoms and two amine nitrogen atoms of the macrocyclic ligand and its coordination sphere is completed by the two axial bidendate nitrate anions.
Słowa kluczowe
Lanthanide complexes, Chiral complexes, Macrocycles, Crystal structure
Adres publiczny
https://doi.org/10.1016/j.jallcom.2007.04.151
Strona internetowa wydawcy
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