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- W1617555718 abstract "The preparation and molecular structures of two novel dimeric transition metal silylamide complexes {Li0.5Zr[NHSi(NMe2)3]1.5[NSi(NMe2)3]0.5[μ-NSi(NMe2)3]}2 and {Li0.5Hf[NHSi(NMe2)3]1.5[NSi(NMe2)3]0.5[μ-NSi(NMe2)3]}2 with a tetrahedral coordination environment are reported. Thermal ammonolysis of {Li0.5Zr[NHSi(NMe2)3]1.5[NSi(NMe2)3]0.5[μ-NSi(NMe2)3]}2 in an autoclave yields a mesoporous partially lithiated silicon zirconium imide powder Si3Zr(N)(NH)x(NH2)y(NMe2)z with a surface area of 440 m2/g. A microporous partially lithiated silicon hafnium imide powder Si3Hf(N)(NH)x(NH2)y(NMe2)z with a surface area of 232 m2/g was obtained via a similar ammonolysis process of {Li0.5Hf[NHSi(NMe2)3]1.5[NSi(NMe2)3]0.5[μ-NSi(NMe2)3]}2. Both of these silicon zirconium and hafnium imide powders have a disordered octahedral coordination environment. Pyrolysis of these zirconium and hafnium silicon imide powders leads to the formation of mixtures of porous zirconium or hafnium lithium silicon nitride ceramics with a regular octahedral coordination environment. They contain some residual lithium and exhibit a much reduced surface area due to an almost total collapse of the pores during the pyrolysis process." @default.
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- W1617555718 date "2011-03-01" @default.
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- W1617555718 title "Preparation, Structural Characterization, and Thermal Ammonolysis of Two Novel Dimeric Transition Silylamide Complexes" @default.
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- W1617555718 doi "https://doi.org/10.1111/j.1744-7402.2009.02452.x" @default.
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