Heteroleptic 3-(2-benzothiazol-2-yl)-2-naphtholates of rare earth metals: Features of synthesis and structure

•A series of heteroleptic complexes of Y, Nd, Tm and Yb was synthesized.•Yttrium complex containing three different ligands was structurally characterized.•Tetranuclear heteroligand Y complex was synthesized and structurally characterized.•The reaction route depends on acidity of protonated ligands and steric demands.

A set of Y, Nd, Tm and Yb complexes containing, along with 3-(2-benzothiazol-2-yl)-2-naphtholate (L), the 8-oxyquinolate (Q), pentafluorophenolate, cyclopentadienyl (Cp) or methylcyclopentadienyl (CpMe) ligands were synthesized using Ln[N(SiMe3)2]3, Ln(Cp)3 or Ln(CpMe)3 as starting materials. Depending on molar ratio of initial reagents the mononuclear, dinuclear or tetranuclear products were isolated from the reaction mixtures. The complexes Y2(L)4(CpMe)2, Nd2(L)4(Cp)2, Yb(L)(Cp)2, Y2(L)3(Q)2(CpMe) and Y4(L)(Q)11 were structurally characterized. The synthesis routes and conditions governing the set of ligands in products and their nuclearity are discussed.

Graphical abstractHeteroligand rare earth complexes containing 3-(2-benzothiazol-2-yl)-2-naphtholate ligand were synthesized and structurally characterized.Figure optionsDownload full-size imageDownload as PowerPoint slide