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	hartrees
Energy at 0K	-873.390749
Energy at 298.15K
HF Energy	-873.390749
Nuclear repulsion energy	192.276032

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	2229	2229	143.36
2	A₁	2222	2222	7.94
3	A₁	2199	2199	60.90
4	A₁	958	958	70.72
5	A₁	933	933	0.93
6	A₁	895	895	174.90
7	A₁	563	563	5.44
8	A₁	381	381	0.55
9	A₁	94	94	1.27
10	A₂	2227	2227	0.00
11	A₂	947	947	0.00
12	A₂	707	707	0.00
13	A₂	410	410	0.00
14	A₂	51	51	0.00
15	B₁	2232	2232	223.46
16	B₁	2207	2207	25.27
17	B₁	952	952	70.09
18	B₁	593	593	9.27
19	B₁	308	308	17.30
20	B₁	74	74	0.09
21	B₂	2228	2228	61.91
22	B₂	2217	2217	103.48
23	B₂	951	951	31.19
24	B₂	881	881	323.59
25	B₂	716	716	276.37
26	B₂	459	459	6.07
27	B₂	428	428	17.91

Atom	x (Å)	y (Å)	z (Å)
Si1	0.000	0.000	0.893
Si2	0.000	1.947	-0.420
Si3	0.000	-1.947	-0.420
H4	1.199	0.000	1.772
H5	-1.199	0.000	1.772
H6	0.000	3.163	0.431
H7	0.000	-3.163	0.431
H8	1.203	1.980	-1.288
H9	-1.203	1.980	-1.288
H10	-1.203	-1.980	-1.288
H11	1.203	-1.980	-1.288

	Si1	Si2	Si3	H4	H5	H6	H7	H8	H9	H10	H11
Si1		2.3479	2.3479	1.4871	1.4871	3.1967	3.1967	3.1819	3.1819	3.1819	3.1819
Si2	2.3479		3.8935	3.1675	3.1675	1.4841	5.1800	1.4840	1.4840	4.1980	4.1980
Si3	2.3479	3.8935		3.1675	3.1675	5.1800	1.4841	4.1980	4.1980	1.4840	1.4840
H4	1.4871	3.1675	3.1675		2.3984	3.6391	3.6391	3.6449	4.3655	4.3655	3.6449
H5	1.4871	3.1675	3.1675	2.3984		3.6391	3.6391	4.3655	3.6449	3.6449	4.3655
H6	3.1967	1.4841	5.1800	3.6391	3.6391		6.3261	2.4081	2.4081	5.5547	5.5547
H7	3.1967	5.1800	1.4841	3.6391	3.6391	6.3261		5.5547	5.5547	2.4081	2.4081
H8	3.1819	1.4840	4.1980	3.6449	4.3655	2.4081	5.5547		2.4064	4.6345	3.9607
H9	3.1819	1.4840	4.1980	4.3655	3.6449	2.4081	5.5547	2.4064		3.9607	4.6345
H10	3.1819	4.1980	1.4840	4.3655	3.6449	5.5547	2.4081	4.6345	3.9607		2.4064
H11	3.1819	4.1980	1.4840	3.6449	4.3655	5.5547	2.4081	3.9607	4.6345	2.4064

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
S1	S2	H6	111.053	S1	S2	H8	110.230
S1	S2	H9	110.230	S1	S3	H7	111.053
S1	S3	H10	110.230	S1	S3	H11	110.230
S2	S1	S3	112.019	S2	S1	H4	109.305
S2	S1	H5	109.305	S3	S1	H4	109.305
S3	S1	H5	109.305	H4	S1	H5	107.494
H6	S2	H8	108.454	H6	S2	H9	108.454
H7	S3	H10	108.454	H7	S3	H11	108.454
H8	S2	H9	108.345	H10	S3	H11	108.345

All results from a given calculation for Si₃H₈ (trisilane)

using model chemistry: TPSSh/aug-cc-pCVTZ

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	0.276
2	Si	0.568
3	Si	0.568
4	H	-0.161
5	H	-0.161
6	H	-0.217
7	H	-0.217
8	H	-0.164
9	H	-0.164
10	H	-0.164
11	H	-0.164

<r²>	208.755
(<r²>)^1/2	14.448

All results from a given calculation for Si3H8 (trisilane)

using model chemistry: TPSSh/aug-cc-pCVTZ

States and conformations

All results from a given calculation for Si₃H₈ (trisilane)