Molecular structures of volatile Ce(IV) tetrafluoroisopropoxide complexes with TMEDA and diglyme. CVD experiments
摘要:
The structures of the cerium tetrafluoroisopropoxide adducts with TMEPA (1) and diglyme [Me(OC2H4)(2)OMe] (2) were established by single crystal X-ray diffraction (TMEDA=tetramethylethane-1,2-diamine). The cerium atom is hexa- and heptacoordinated for 1 and 2, respectively. The Ce-O(hfip) bond distances are quite short [2.115(5)-2.152(6) Angstrom] and are associated to large Ce-O(hfip) angles (>156degrees). Both complexes display a range of short F...C contacts, the shortest ones having values of 3.754 and 4.060 Angstrom for 1 and 2, respectively. Decomposition experiments were achieved in a cold-wall reactor. The films deposited on glass substrates were characterized by X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis spectroscopy. (C) 2002 Elsevier Science Ltd. All rights reserved.
Molecular structures of volatile Ce(IV) tetrafluoroisopropoxide complexes with TMEDA and diglyme. CVD experiments
摘要:
The structures of the cerium tetrafluoroisopropoxide adducts with TMEPA (1) and diglyme [Me(OC2H4)(2)OMe] (2) were established by single crystal X-ray diffraction (TMEDA=tetramethylethane-1,2-diamine). The cerium atom is hexa- and heptacoordinated for 1 and 2, respectively. The Ce-O(hfip) bond distances are quite short [2.115(5)-2.152(6) Angstrom] and are associated to large Ce-O(hfip) angles (>156degrees). Both complexes display a range of short F...C contacts, the shortest ones having values of 3.754 and 4.060 Angstrom for 1 and 2, respectively. Decomposition experiments were achieved in a cold-wall reactor. The films deposited on glass substrates were characterized by X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis spectroscopy. (C) 2002 Elsevier Science Ltd. All rights reserved.