Structure and potential applications of amido lanthanide complexes chelated by bifunctional b-diketiminate ligand

0427879 - ÚFCH JH 2015 RIV CH eng J - Článek v odborném periodiku
Olejník, R. - Padělková, Z. - Fridrichová, A. - Horáček, Michal - Merna, J. - Růžička, A.
Structure and potential applications of amido lanthanide complexes chelated by bifunctional b-diketiminate ligand.
Journal of Organometallic Chemistry. Roč. 759, JUN 2014 (2014), s. 1-10. ISSN 0022-328X. E-ISSN 1872-8561
Grant CEP: GA ČR GAP106/10/0924
Institucionální podpora: RVO:61388955
Klíčová slova: Bifunctional b-diketiminates * lanthanides * hydroamination
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 2.173, rok: 2014

The synthesis and structure of lanthanide(III) amides containing one bifunctional b-diketiminate ligand is reported. Compounds were obtained via a protolytic reaction of the free b-diketimine {N-[(2-MeO) C6H5]}N]C(Me)CH]C(Me)N(H){N0-[(2-MeO)C6H5]} (LCOH) or {N-[(2-MeO)C6H5]}N]CHCH]CHN(H) {N0-[(2-MeO)C6H5]} (LHOH) with corresponding tris(amide) of the Ln[N(SiMe3)2]3 (Ln ¼ Y, La, Nd, Sm, Eu, Gd and Yb) type in equimolar ratio at ambient temperature. Products were characterized by IR and/or multinuclear NMR spectroscopy techniques and structures of four of them have been determined by Xray diffraction techniques. Complexes LCOY[N(SiMe3)2]2, LCOLa[N(SiMe3)2]2, LCONd[N(SiMe3)2]2 and LHOYb [N(SiMe3)2]2 crystalize as monomers with the six-coordinated metal centre by two amido and one tetradentate b-diketiminato ligands. Minor hydrolytic products of composition [LCOSmN(SiMe3)2]2O and (LCO)4O2(OH)4La4 were obtained and their structures contain two or four lanthanide atoms linked through the oxo- or hydroxo bridges. Diamagnetic complexes were tested for its potential applications in hydroamination and polymerization reactions, respectively, giving low conversion in all reactions.
Trvalý link: http://hdl.handle.net/11104/0233323