Stereospecific assembly of chiral Λ-Cr(III)-Δ-Ln(III)-oxalato-bridged dinuclear 3d–4f complexes (Ln = Yb or Dy) and near infrared circular dichroism in the 4f→4f transitions
Abstract
Stereospecific formation of the chiral heterodinuclear 3d–4f complexes (Λ–Δ)-[(acac)2Cr(ox)Ln(HBpz3)2] (acac− = acetylacetonate, ox2− = oxalato, HBpz3− = hydrotris(pyrazol-1-yl)borato; Ln = Yb: 1, Dy: 2 where (Λ–Δ) implies the absolute configuration around the octahedral Cr and square antiprismatic Ln moiety, respectively) was demonstrated by comparing the near infrared circular dichroism (NIR CD) in the 4f→4f transitions and/or the single crystal