کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1323530 1499881 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure and potential applications of amido lanthanide complexes chelated by bifunctional β-diketiminate ligand
ترجمه فارسی عنوان
ساختار و کاربرد بالقوه مجتمع های آمید لانتاناید با لیگاند دوپامین
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
چکیده انگلیسی


• Bifunctional β-diketiminate lanthanide amides are prepared.
• The structure is studied by NMR, IR and XRD techniques.
• Catalytic activity of selected complexes is reported.

The synthesis and structure of lanthanide(III) amides containing one bifunctional β-diketiminate ligand is reported. Compounds were obtained via a protolytic reaction of the free β-diketimine {N-[(2-MeO)C6H5]}NC(Me)CHC(Me)N(H){N′-[(2-MeO)C6H5]} (LCOH) or {N-[(2-MeO)C6H5]}NCHCHCHN(H){N′-[(2-MeO)C6H5]} (LHOH) with corresponding tris(amide) of the Ln[N(SiMe3)2]3 (Ln = 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 X-ray 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 β-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.

Synthesis and structures of bifunctional β-diketiminate lanthanide(III) amides are described along with catalytic activity in hydroamination and polymerization reactions.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 759, 1 June 2014, Pages 1–10
نویسندگان
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