Film growth precursor development for metal nitrides. Synthesis, structure, and volatility of molybdenum(VI) and tungsten(VI) complexes containing bis(imido) metal fragments and various nitrogen donor ligands

被引:26
作者
El-Kadri, OM [1 ]
Heeg, MJ [1 ]
Winter, CH [1 ]
机构
[1] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA
关键词
D O I
10.1039/B515378F
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The molybdenum and tungsten complexes W-2(NtBu)(4)(pz)(4)(pzH)center dot(C6H14)(0.5) ( pz = pyrazolate), M(NtBu)(2)(Me(2)pz)(2)(Me(2)pzH)(2) (Me(2)pz = 3,5- dimethylpyrazolate), M(NtBu)(2)(tBu(2)pz)(2) (tBu(2)pz = 3,5-di-tert-butylpyrazolate), M-2(NtBu)(4)(Me(2)pz)(2)Cl-2, W(NtBu)(2)(C2N3(iPr)(2))(2)py(2), M(NtBu)(2)- (CN4CF3)(2)py(2), and W(NtBu)(2)(PhNNNPh)(2) were prepared by various synthetic routes from the starting materials Mo(NtBu)(2)Cl-2, W(NtBu)(2)(NHtBu)(2), and W(NtBu)(2)Cl(2)py(2). These new complexes were characterized by spectral and analytical methods and by X-ray crystal structure determinations. The volatilities and thermal stabilities were evaluated to determine the potential of the new complexes for use in thin film growth of metal nitride films. Mo(NtBu)(2)(tBu(2)pz)(2) and W(NtBu)(2)(tBu(2)pz)(2) were found to have the optimum combination of volatility and thermal stability for application in atomic layer deposition thin film growth procedures.
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页码:1943 / 1953
页数:11
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