设计热反应铅烯的稳定性。
Designing Stability into Thermally Reactive Plumbylenes.
机构信息
Department of Chemistry , Carleton University , 1125 Colonel By Drive , Ottawa , Ontario K1S 5B6 , Canada.
出版信息
Inorg Chem. 2018 Jul 16;57(14):8218-8226. doi: 10.1021/acs.inorgchem.8b00719. Epub 2018 Jun 26.
Lead analogues of N-heterocyclic carbenes (NHPbs) are the least understood members of this increasingly important class of compounds. Here we report the design, preparation, isolation, structure, volatility, and decomposition pathways of a novel aliphatic NHPb: rac- N , N -di- tert-butylbutane-2,3-diamido lead(II) (1Pb). The large steric bulk of the tert-butylamido moieties and rac-butane backbone successfully hinder redox decomposition pathways observed for diamidoethylene and -ethane backbone analogues, pushing the onset of thermal decomposition from below 0 °C to above 150 °C. With an exceptionally high vapor pressure of 1 Torr at 94 ± 2 °C and excellent thermal stability among Pb(II) complexes, 1Pb is a promising precursor for the chemical vapor deposition (CVD) and atomic layer deposition (ALD) of functional lead-containing materials.
N-杂环卡宾（NHCs）的铅类似物是此类日益重要的化合物中了解最少的成员。在这里，我们报告了一种新型脂肪族 NHCp 的设计、制备、分离、结构、挥发性和分解途径：rac-N,N-二-叔丁基丁烷-2,3-二酰胺基铅（II）（1Pb）。叔丁基酰胺基部分和 rac-丁烷骨架的大空间位阻成功阻止了二酰胺基乙烯和乙二胺骨架类似物观察到的氧化还原分解途径，将热分解的起始温度从 0 °C 以下推高到 150 °C 以上。由于其蒸气压力非常高（在 94 ± 2 °C 时为 1 Torr），并且在 Pb(II)配合物中具有出色的热稳定性，因此 1Pb 是化学气相沉积（CVD）和原子层沉积（ALD）功能含铅材料的有前途的前体。
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