Infrared Spectroscopic Study of the Cryogenic Thin Film and Matrix-Isolated Complexes of TiCl4 with NH3 and (CH3)3N
摘要:
The matrix isolation technique and infrared spectroscopy have been used to isolate and characterize for the first time the 1:1 complex of TiCl4 with NH3. Intense spectral features at 440 and 457 cm(-1) were assigned to the Ti-CI antisymmetric stretching modes in this complex; the NH3 symmetric deformation was observed above 1200 cm(-1), shifted over 200 cm(-1) from the parent band position. The spectra suggest a trigonal bipyramidal arrangement about the central titanium with the NH3 ligand in an axial position. A similar set of product bands was observed for the 1:1 complex of TiCl4 with (CH3)(3)N, a species which had been observed previously but not fully characterized. Cryogenic thin film experiments with subsequent warming led to the formation of the 1:1 complex and further reaction products, including the 1:2 complex and two or more amido and/or imido complexes.
On donne les produits de reaction obtenus aux diverses temperatures. Mecanisme: il y a d'abord formation de ZrCl 4 •2NH 3 , puis ZrClN. Au-dessus de 1000°C, ZrN x est forme
Donne les produits de reaction obtenus aux 不同温度。机制:il ya d'abord 地层 de ZrCl 4 •2NH 3 ,puis ZrClN。Au-dessus de 1000°C, ZrN x est forme