Amine substituted trisilylamine and tridisilylamine compounds and synthesis methods thereof
Halogen free amine substituted trisilylamine and tridisilylamine compounds and a method of their preparation via de-hydrogenative coupling between the corresponding unsubstituted trisilylamines and amines catalyzed by transition metal catalysts is described. This new approach is based on the catalytic dehydrocoupling of a Si—H and a N—H moiety to form an Si—N containing compound and hydrogen gas. The process can be catalyzed by transition metal heterogenous catalysts such as Ru(0) on carbon, Pd(0) on MgO) as well as transition metal organometallic complexes that act as homogeneous catalysts. The —Si—N containing products are halide free. Such compounds can be useful for the deposition of thin films by chemical vapor deposition or atomic layer deposition of Si containing films.
1. A compound having the formula:
where n=1 to 3; m=0 to 3; k=0 to 3; R 1 , R 3 , and R 5 are independently selected from H, linear or branched C 1 to C 6 alkyl, linear or branched C 1 to C 8 alkenyl, linear or branched C 1 to C 8 alkynyl, C 6 to C 10 aryl, linear or branched C 1 to C 6 alkyl ether, silyl, trimethyl silyl, or linear or branched C 1 to C 6 alkyl-substituted silyl; R 2 , R 4 , and R 6 are independently selected from a linear or branched C 1 to C 6 alkyl, linear or branched C 1 to C 8 alkenyl, linear or branched C 1 to C 8 alkynyl, C 6 to C 10 aryl, linear or branched C 1 to C 6 alkyl ether, silyl, trimethyl silyl, or linear or branched C 1 to C 6 alkyl-substituted silyl; R 1 R 2 N, R 3 R 4 N and R 5 R 6 N R 1 R 2 N, R 3 R 4 N and R 5 R 6 N can be cyclic secondary amines independently selected from aziridine, azetidine, piperidine, pyrrolidine, pyrrole, imidazole, pyrazole, indole or any C-substituted derivatives of the cyclic secondary amine; and excluding compounds having the formula C 18 H 48 N 4 Si 3 ; C 15 H 41 N 3 Si 3 ; C 6 H 21 NSi 3 and C 7 H 23 NSi 3 or the said compounds exclude the following known compound: [(SiH 3 ) 2 N] 2 SiH 2 .
2. A compound having the formula:
where n=1 to 3; m=0 to 3; k=0 to 3; R 1 , R 3 , and R 5 are independently selected from H, linear or branched C 1 to C 6 alkyl, linear or branched C 1 to C 8 alkenyl, linear or branched C 1 to C 8 alkynyl, C 6 to C 10 aryl, linear or branched C 1 to C 6 alkyl ether, silyl, trimethyl silyl, or linear or branched C 1 to C 6 alkyl-substituted silyl; R 2 , R 4 , and R 6 are independently selected from a linear or branched C 1 to C 6 alkyl, linear or branched C 1 to C 8 alkenyl, linear or branched C 1 to C 8 alkynyl, C 6 to C 10 aryl, linear or branched C 1 to C 6 alkyl ether, silyl, trimethyl silyl, or linear or branched C 1 to C 6 alkyl-substituted silyl; R 1 R 2 N, R 3 R 4 N and R 5 R 6 N R 1 R 2 N, R 3 R 4 N and R 5 R 6 N can be cyclic secondary amines independently selected from aziridine, azetidine, piperidine, pyrrolidine, pyrrole, imidazole, pyrazole, indole or any C-substituted derivatives of the cyclic secondary amine.
3. A compound having the formula:
where R 1 , R 2 are independently selected from H, a linear or branched C 1 to C 6 alkyl, linear or branched C 1 to C 8 alkenyl, linear or branched C 1 to C 8 alkynyl, C 6 to C 10 aryl, linear or branched C 1 to C 6 alkyl ether, trimethyl silyl, or linear or branched C 1 to C 6 alkyl-substituted silyl; R 3 , R 4 , and R 5 are independently selected from H, a linear or branched C 1 to C 6 alkyl, linear or branched C 1 to C 8 alkenyl, linear or branched C 1 to C 8 alkynyl, C 6 to C 10 aryl, linear or branched C 1 to C 6 alkyl ether, silyl, trimethyl silyl, or linear or branched C 1 to C 6 alkyl-substituted silyl; and R 1 R 2 N can be a cyclic secondary amine selected from aziridine, azetidine, piperidine, pyrrolidine, pyrrole, imidazole, pyrazole, indole or any C-substituted derivatives of the cyclic secondary amine.
4. The compound of claim 3 having the formula:
5. The compound of claim 3 wherein R 1 , R 2 are independently selected from the group consisting of H, methyl, ethyl, iso-propyl, and t-butyl; or NR 1 R 2 are a cyclic saturated or unsaturated cyclic amine with 3 to 8 carbon atoms, when R 1 is H then R 2 cannot be methyl or ethyl.
6. The compound of claim 3 wherein R 1 , R 2 are ethyl.
7. The compound of claim 3 wherein R 1 , R 2 are iso-propyl.