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	hartrees
Energy at 0K	-863.269167
Energy at 298.15K	-863.277343
HF Energy	-863.269167
Nuclear repulsion energy	199.620554

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	2731	2400	29.82
2	A₁	2681	2356	16.37
3	A₁	2678	2354	2.18
4	A₁	1147	1008	103.71
5	A₁	1133	996	0.19
6	A₁	1071	942	188.77
7	A₁	683	601	14.28
8	A₁	497	436	2.95
9	A₁	136	120	2.16
10	A₂	2730	2399	0.00
11	A₂	1138	1000	0.00
12	A₂	872	767	0.00
13	A₂	566	497	0.00
14	A₂	82	72	0.00
15	B₁	2731	2400	52.80
16	B₁	2714	2385	8.81
17	B₁	1140	1002	90.23
18	B₁	711	625	16.34
19	B₁	424	373	29.83
20	B₁	89	78	0.04
21	B₂	2731	2400	12.14
22	B₂	2677	2353	16.52
23	B₂	1141	1003	30.42
24	B₂	1056	928	297.46
25	B₂	891	783	352.90
26	B₂	613	538	4.39
27	B₂	578	508	25.52

Atom	x (Å)	y (Å)	z (Å)
Si1	0.000	0.000	0.831
Si2	0.000	1.884	-0.392
Si3	0.000	-1.884	-0.392
H4	1.155	0.000	1.698
H5	-1.155	0.000	1.698
H6	0.000	3.054	0.453
H7	0.000	-3.054	0.453
H8	1.164	1.956	-1.241
H9	-1.164	1.956	-1.241
H10	-1.164	-1.956	-1.241
H11	1.164	-1.956	-1.241

	Si1	Si2	Si3	H4	H5	H6	H7	H8	H9	H10	H11
Si1		2.2455	2.2455	1.4444	1.4444	3.0770	3.0770	3.0778	3.0778	3.0778	3.0778
Si2	2.2455		3.7676	3.0413	3.0413	1.4430	5.0093	1.4431	1.4431	4.1012	4.1012
Si3	2.2455	3.7676		3.0413	3.0413	5.0093	1.4430	4.1012	4.1012	1.4431	1.4431
H4	1.4444	3.0413	3.0413		2.3095	3.4943	3.4943	3.5308	4.2242	4.2242	3.5308
H5	1.4444	3.0413	3.0413	2.3095		3.4943	3.4943	4.2242	3.5308	3.5308	4.2242
H6	3.0770	1.4430	5.0093	3.4943	3.4943		6.1076	2.3305	2.3305	5.4150	5.4150
H7	3.0770	5.0093	1.4430	3.4943	3.4943	6.1076		5.4150	5.4150	2.3305	2.3305
H8	3.0778	1.4431	4.1012	3.5308	4.2242	2.3305	5.4150		2.3282	4.5521	3.9117
H9	3.0778	1.4431	4.1012	4.2242	3.5308	2.3305	5.4150	2.3282		3.9117	4.5521
H10	3.0778	4.1012	1.4431	4.2242	3.5308	5.4150	2.3305	4.5521	3.9117		2.3282
H11	3.0778	4.1012	1.4431	3.5308	4.2242	5.4150	2.3305	3.9117	4.5521	2.3282

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
S1	S2	H6	111.204	S1	S2	H8	111.246
S1	S2	H9	111.246	S1	S3	H7	111.204
S1	S3	H10	111.246	S1	S3	H11	111.246
S2	S1	S3	114.054	S2	S1	H4	109.084
S2	S1	H5	109.084	S3	S1	H4	109.084
S3	S1	H5	109.084	H4	S1	H5	106.153
H6	S2	H8	107.708	H6	S2	H9	107.708
H7	S3	H10	107.708	H7	S3	H11	107.708
H8	S2	H9	107.546	H10	S3	H11	107.546

All results from a given calculation for Si₃H₈ (trisilane)

using model chemistry: mPW1PW91/STO-3G

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Number	Element	Mulliken
1	Si	0.242
2	Si	0.357
3	Si	0.357
4	H	-0.118
5	H	-0.118
6	H	-0.119
7	H	-0.119
8	H	-0.121
9	H	-0.121
10	H	-0.121
11	H	-0.121

<r²>	193.401
(<r²>)^1/2	13.907

All results from a given calculation for Si3H8 (trisilane)

using model chemistry: mPW1PW91/STO-3G

States and conformations

All results from a given calculation for Si₃H₈ (trisilane)