Mapa strony Przejdź do treści

Repozytorium

Wyszukaj

Kolekcje

Inne

Lanthanide(III) and lead(II) complexes of a chiral nonaaza macrocyclic amine based on 1,2-diaminocyclopentane.

Autorzy

Janusz Gregoliński

Katarzyna Ślepokura

Jerzy Lisowski

Rok wydania

2015

Czasopismo

Dalton Transactions

Numer woluminu

44

Strony

16345-16351

DOI

10.1039/C5DT02478A

Kolekcja

Naukowa

Język

Angielski

Typ publikacji

Artykuł

Streszczenie

The macrocyclic nonaaza 3 + 3 amine based on diaminocyclopentane forms enantiopure helical complexes with lanthanide(III) ions. In contrast to analogous complexes based on 1,2-trans-diaminocyclohexane, no clear helicity process is observed. Crystal structures of these compounds show tight helical wrapping of the macrocycle around the lanthanide(III) ion leading to the formation of a double helix. In contrast, more “open” conformation is observed for the free macrocycle. Similar double-helical conformation of the ligand was also observed for the lead(II) complex. In the case of this complex the NMR spectra indicate a dynamic process in which the C2-symmetric molecule observed in the solid state gives rise to an effective, averaged D3-symmetry in solution at elevated temperatures.

Adres publiczny

http://dx.doi.org/10.1039/C5DT02478A

Strona internetowa wydawcy

https://www.rsc.org/

Podobne publikacje
2022

Multinuclear Ni(II) and Cu(II) complexes of a meso 6 + 6 macrocyclic amine derived from trans-1,2-diaminocyclopentane and 2,6-diformylpyridine

Gregoliński Janusz, Ślepokura Katarzyna, Kłak Julia, Witwicki Maciej

2008

New lanthanide(III) complexes of chiral nonadendate macrocyclic amine derived from (1R,2R)-1,2-diaminocyclohexane and 2,6-diformal-4-methylphenol.

Paluch Marta, Lisowski Jerzy

2006

Synthesis and structural characterisation of nickel 15-metallacrown-5 complexes with lanthanide(III) and lead(II) ions: influence of the central metal ion size on the spin state of peripheral nickel(II) ions.

Seda Sabry H., Janczak Jan, Lisowski Jerzy