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Inne
Artificial amino acids in nickel(II) and nickel(II)/lanthanide(III) chemistry.
Autorzy
Rok wydania
2011
Czasopismo
Numer woluminu
50
Strony
5175-5185
DOI
10.1021/ic2004744
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The synthesis and magnetic properties of five new homo- and heterometallic nickel(II) complexes containing artificial amino acids are reported: [Ni4(aib)3(aibH)3(NO3)](NO3)4·3.05MeOH (1·3.05MeOH), [Ni6La(aib)12](NO3)3·5.5H2O (2·5.5H2O), [Ni6Pr(aib)12](NO3)3·5.5H2O (3·5.5H2O), [Ni5(OH)2(l-aba)4(OAc)4]·0.4EtOH·0.3H2O 6(4·0.4EtOH·0.3H2O), and [Ni6La(l-aba)12][La2(NO3)9] (5; aibH = 2-aminoisobutyric acid; l-abaH = l-2-aminobutyric acid). Complexes 1 and 4 describe trigonal-pyramidal and square-based pyramidal metallic clusters, respectively, while complexes 2, 3, and 5 can be considered to be metallocryptand-encapsulated lanthanides. Complexes 4 and 5 are chiral and crystallize in the space groups I222 and P213, respectively. Direct-current magnetic susceptibility studies in the 2–300 K range for all complexes reveal the presence of dominant antiferromagnetic exchange interactions, leading to small or diamagnetic ground states.
Adres publiczny
https://doi.org/10.1021/ic2004744
Strona internetowa wydawcy
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