Novel mononuclear mixed ligand Ce(III) pivalate with protonated cationic form of monoethanolamine as ancillary ligand

The mononuclear mixed ligand Ce(III) pivalate with protonated cationic form of monoethanolamine (MEA) as ancillary ligand is reported. Crystal structure consists of mononuclear complex anions [Ce(Piv)5(HOCH2CH2NH3)]− (HPiv–2,2-dimethylpropionic (pivalic) acid) and cations [HOCH2CH2NH3]+ connected by hydrogen bonds into hexagonal layers packed over α-graphite motif. Central cerium ion coordinates six oxygen atoms of three bidentate chelate Piv− ligands, two O atoms of two monodentate pivalate ligands and one — of MEA in N-protonated cationic form. Five tert-butyl groups of pivalate ligands shield cerium(III) ion that facilitates coordination of ancillary ligand with positive charge on its peripheral part.

Graphical AbstractA novel mononuclear mixed ligand Ce(III) pivalate with protonated cationic form of monoethanolamine (MEA) as ancillary ligand is reported. Crystal structure consists of mononuclear complex anions [Ce(Piv)5(HOCH2CH2NH3)]− (HPiv–2,2-dimethylpropionic (pivalic) acid) and cations [HOCH2CH2NH3]+ connected by hydrogen bonds into hexagonal layers packed over α-graphite motif.Figure optionsDownload as PowerPoint slideResearch Highlights
► Crystal structure of mononuclear Ce(III) pivalate with MEA have been determined.
► Protonated MEA ions act either as inner-sphere ligands or as external cations.
► In complex anion Ce(III) coordinates five pivalate ligands and protonated MEA cation.
► Complex anions and external cations are H-bonded into layers with α-graphite motif.