Synthesis, structural characterization, and volatility evaluation of zirconium and hafnium amidate complexes
作者:Mahesh C. Karunarathne、Joseph W. Baumann、Mary Jane Heeg、Philip D. Martin、Charles H. Winter
DOI:10.1016/j.jorganchem.2017.03.003
日期:2017.10
for tetrakis(N-tert-butylacetamido)zirconium, tetrakis(N-isopropylacetamido)zirconium, tetrakis(N-isopropylacetamido)hafnium, tetrakis(N-methylacetamido)zirconium, and tetrakis(N-tert-butylformamido)zirconium. These complexes are monomeric in the solid state, with eight-coordinate metal centers surrounded by four κ2-N,O-amidate ligands. Six of the eight new complexes undergo sublimation on a preparative
在回流的甲苯中用四当量的N-叔丁基乙酰胺,N-异丙基异丁酰胺,N-异丙基乙酰胺,N-甲基乙酰胺或N-叔丁基甲酰胺处理四(二甲基氨基)锆或四(二甲基氨基)ha,然后将其升华。于105–125°C / 0.05 Torr下得到粗产品,得到四(N-叔丁基乙酰胺基)锆(81%),四(N-异丙基异丁酰胺基)锆(87%),四(N-异丙基乙酰胺基)锆(51%) ,四(N-叔丁基乙酰胺基)ha(83%),四(N-异丙基异丁酰胺基)ha(79%),四(N-异丙基乙酰胺基)ha(67%),四(N-甲基乙酰胺基)锆(5 %)和四(N-叔-丁基甲酰胺基)锆(1%),为无色结晶固体。新配合物的结构分配基于光谱和分析数据以及X射线晶体结构测定的四(N-叔丁基乙酰胺基)锆,四(N-异丙基乙酰胺基)锆,四(N-异丙基乙酰胺基)ha,四(N-甲基乙酰胺基)锆和四(N-叔丁基甲酰胺基)锆。这些络合物在固态单体的,具有八个坐标