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	hartrees
Energy at 0K	-871.974598
Energy at 298.15K
HF Energy	-871.453710
Nuclear repulsion energy	192.404614

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A₁	2257	2257
2	A₁	2245	2245
3	A₁	2227	2227
4	A₁	964	964
5	A₁	940	940
6	A₁	905	905
7	A₁	571	571
8	A₁	393	393
9	A₁	96	96
10	A₂	2253	2253
11	A₂	955	955
12	A₂	715	715
13	A₂	422	422
14	A₂	89	89
15	B₁	2258	2258
16	B₁	2237	2237
17	B₁	960	960
18	B₁	601	601
19	B₁	315	315
20	B₁	102	102
21	B₂	2256	2256
22	B₂	2240	2240
23	B₂	957	957
24	B₂	893	893
25	B₂	727	727
26	B₂	471	471
27	B₂	438	438

Atom	x (Å)	y (Å)	z (Å)
Si1	0.000	0.000	0.909
Si2	0.000	1.933	-0.426
Si3	0.000	-1.933	-0.426
H4	1.205	0.000	1.786
H5	-1.205	0.000	1.786
H6	0.000	3.165	0.406
H7	0.000	-3.165	0.406
H8	1.206	1.946	-1.296
H9	-1.206	1.946	-1.296
H10	-1.206	-1.946	-1.296
H11	1.206	-1.946	-1.296

	Si1	Si2	Si3	H4	H5	H6	H7	H8	H9	H10	H11
Si1		2.3490	2.3490	1.4902	1.4902	3.2050	3.2050	3.1784	3.1784	3.1784	3.1784
Si2	2.3490		3.8658	3.1749	3.1749	1.4868	5.1656	1.4873	1.4873	4.1540	4.1540
Si3	2.3490	3.8658		3.1749	3.1749	5.1656	1.4868	4.1540	4.1540	1.4873	1.4873
H4	1.4902	3.1749	3.1749		2.4094	3.6572	3.6572	3.6449	4.3700	4.3700	3.6449
H5	1.4902	3.1749	3.1749	2.4094		3.6572	3.6572	4.3700	3.6449	3.6449	4.3700
H6	3.2050	1.4868	5.1656	3.6572	3.6572		6.3306	2.4164	2.4164	5.5203	5.5203
H7	3.2050	5.1656	1.4868	3.6572	3.6572	6.3306		5.5203	5.5203	2.4164	2.4164
H8	3.1784	1.4873	4.1540	3.6449	4.3700	2.4164	5.5203		2.4121	4.5784	3.8914
H9	3.1784	1.4873	4.1540	4.3700	3.6449	2.4164	5.5203	2.4121		3.8914	4.5784
H10	3.1784	4.1540	1.4873	4.3700	3.6449	5.5203	2.4164	4.5784	3.8914		2.4121
H11	3.1784	4.1540	1.4873	3.6449	4.3700	5.5203	2.4164	3.8914	4.5784	2.4121

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
S1	S2	H6	111.355	S1	S2	H8	109.849
S1	S2	H9	109.849	S1	S3	H7	111.355
S1	S3	H10	109.849	S1	S3	H11	109.849
S2	S1	S3	110.748	S2	S1	H4	109.540
S2	S1	H5	109.540	S3	S1	H4	109.540
S3	S1	H5	109.540	H4	S1	H5	107.881
H6	S2	H8	108.675	H6	S2	H9	108.675
H7	S3	H10	108.675	H7	S3	H11	108.675
H8	S2	H9	108.373	H10	S3	H11	108.373

All results from a given calculation for Si₃H₈ (trisilane)

using model chemistry: CCSD(T)=FULL/cc-pV(D+d)Z

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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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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All results from a given calculation for Si3H8 (trisilane)

using model chemistry: CCSD(T)=FULL/cc-pV(D+d)Z

States and conformations

All results from a given calculation for Si₃H₈ (trisilane)