New Volatile Tantalum Imido Precursors with Carboxamide Ligands
收藏NIAID Data Ecosystem2026-03-12 收录
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https://figshare.com/articles/dataset/New_Volatile_Tantalum_Imido_Precursors_with_Carboxamide_Ligands/16627120
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资源简介：
A series of Ta(V) tBu-imido/N-alkoxy carboxamide
complexes, TaCl2(NtBu)(pyridine)(edpa)
(1), TaCl(NtBu)(edpa)2 (2), Ta(NtBu)(edpa)3 (3), TaCl2(NtBu)(pyridine)(mdpa) (4), and Ta(NtBu)(mdpa)3 (5), were successfully
synthesized by metathesis reactions
between Ta(NtBu)Cl3(py)2 and several equivalents of Na(edpa) (edpaH = N-ethoxy-2,2-dimethylpropanamide) and Na(mdpa) (mdpaH = N-methoxy-2,2-dimethylpropanamide). Furthermore, complexes 3 and 5 were simply transformed to new dimeric structures
[Ta(μ2–O)(edpa)3]2 (6) and [Ta(μ2–O)(mdpa)3]2 (7) with the elimination of the NtBu imido group by air exposure. Compounds 1–7 were characterized by 1H and 13C nuclear magnetic resonance spectroscopy, Fourier
transform infrared spectroscopy, elemental analysis, thermogravimetric
analysis (TGA), and single-crystal X-ray diffraction. Single-crystal
X-ray diffraction analysis revealed that complexes 3 and 5 have a distorted pentagonal bipyramidal geometry around
the central Ta atom, with three monoanionic bidentate N-alkoxy carboxamide ligands and one tBu imido ligand saturating the coordination of tantalum ions. TGA
revealed that complexes 3 and 5 had superior
thermal characteristics and stability. These complexes could potentially
be applied as precursors for tantalum oxide thin films.
创建时间：
2021-09-16
