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	hartrees
Energy at 0K	-868.944396
Energy at 298.15K
HF Energy	-868.944396
Nuclear repulsion energy	193.426647

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	2278	2200	170.05
2	A₁	2270	2192	6.20
3	A₁	2247	2170	77.21
4	A₁	960	927	72.54
5	A₁	934	902	1.41
6	A₁	898	867	196.98
7	A₁	571	551	6.50
8	A₁	398	385	0.64
9	A₁	95	92	1.39
10	A₂	2275	2197	0.00
11	A₂	950	917	0.00
12	A₂	722	698	0.00
13	A₂	417	403	0.00
14	A₂	71i	69i	0.00
15	B₁	2280	2202	265.17
16	B₁	2256	2179	27.20
17	B₁	954	921	78.59
18	B₁	596	575	10.80
19	B₁	293	283	17.81
20	B₁	27i	26i	0.04
21	B₂	2276	2198	68.68
22	B₂	2264	2187	130.02
23	B₂	954	921	36.45
24	B₂	884	853	336.96
25	B₂	720	696	263.43
26	B₂	475	459	4.57
27	B₂	432	417	20.07

Atom	x (Å)	y (Å)	z (Å)
Si1	0.000	0.000	0.903
Si2	0.000	1.919	-0.423
Si3	0.000	-1.919	-0.423
H4	1.202	0.000	1.781
H5	-1.202	0.000	1.781
H6	0.000	3.152	0.407
H7	0.000	-3.152	0.407
H8	1.204	1.934	-1.294
H9	-1.204	1.934	-1.294
H10	-1.204	-1.934	-1.294
H11	1.204	-1.934	-1.294

	Si1	Si2	Si3	H4	H5	H6	H7	H8	H9	H10	H11
Si1		2.3325	2.3325	1.4888	1.4888	3.1909	3.1909	3.1645	3.1645	3.1645	3.1645
Si2	2.3325		3.8387	3.1600	3.1600	1.4859	5.1389	1.4857	1.4857	4.1301	4.1301
Si3	2.3325	3.8387		3.1600	3.1600	5.1389	1.4859	4.1301	4.1301	1.4857	1.4857
H4	1.4888	3.1600	3.1600		2.4041	3.6428	3.6428	3.6325	4.3569	4.3569	3.6325
H5	1.4888	3.1600	3.1600	2.4041		3.6428	3.6428	4.3569	3.6325	3.6325	4.3569
H6	3.1909	1.4859	5.1389	3.6428	3.6428		6.3043	2.4131	2.4131	5.4965	5.4965
H7	3.1909	5.1389	1.4859	3.6428	3.6428	6.3043		5.4965	5.4965	2.4131	2.4131
H8	3.1645	1.4857	4.1301	3.6325	4.3569	2.4131	5.4965		2.4073	4.5565	3.8686
H9	3.1645	1.4857	4.1301	4.3569	3.6325	2.4131	5.4965	2.4073		3.8686	4.5565
H10	3.1645	4.1301	1.4857	4.3569	3.6325	5.4965	2.4131	4.5565	3.8686		2.4073
H11	3.1645	4.1301	1.4857	3.6325	4.3569	5.4965	2.4131	3.8686	4.5565	2.4073

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
S1	S2	H6	111.436	S1	S2	H8	109.960
S1	S2	H9	109.960	S1	S3	H7	111.436
S1	S3	H10	109.960	S1	S3	H11	109.960
S2	S1	S3	110.742	S2	S1	H4	109.589
S2	S1	H5	109.589	S3	S1	H4	109.589
S3	S1	H5	109.589	H4	S1	H5	107.685
H6	S2	H8	108.593	H6	S2	H9	108.593
H7	S3	H10	108.593	H7	S3	H11	108.593
H8	S2	H9	108.222	H10	S3	H11	108.222

All results from a given calculation for Si₃H₈ (trisilane)

using model chemistry: TPSSh/3-21G*

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	-0.014
2	Si	0.183
3	Si	0.183
4	H	-0.031
5	H	-0.031
6	H	-0.048
7	H	-0.048
8	H	-0.049
9	H	-0.049
10	H	-0.049
11	H	-0.049

<r²>	205.608
(<r²>)^1/2	14.339

All results from a given calculation for Si3H8 (trisilane)

using model chemistry: TPSSh/3-21G*

States and conformations

All results from a given calculation for Si₃H₈ (trisilane)