Chiral Lanthanide Complexes with l- and d-Alanine: An X-ray and Vibrational Circular Dichroism Study.

ABSTRACT: A whole series of [Ln(H₂O)₄(Ala)₂]₂⁶⁺ dimeric cationic lanthanide complexes with both L- and D-alanine enantiomers was synthesized. The single-crystal X-ray diffraction at 100 and 292 K shows the formation of two types of dimers (I and II) in crystals. Between the dimer centers, the alanine molecules behave as bridging (μ₂-O,O'-) and chelating bridging (μ₂-O,O,O'-) ligands. The first type of bridge is present in dimers I, while both bridge forms can be observed in dimers II. The IR and vibrational circular dichroism (VCD) spectra of all L- and D-alanine complexes were registered in the 1750-1250 cm^-1 range as KBr pellets. Despite all the studied complexes are ex

SUBMITTER: Lyczko K 

PROVIDER: S-EPMC7357152 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature