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All results from a given calculation for SiH(CH3)3 (trimethylsilane)

using model chemistry: B2PLYP/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B2PLYP/cc-pVTZ
 hartrees
Energy at 0K-409.672362
Energy at 298.15K-409.682034
HF Energy-409.453422
Nuclear repulsion energy174.772225
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B2PLYP/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3122 2995 32.20      
2 A1 3046 2922 2.96      
3 A1 2204 2114 162.24      
4 A1 1488 1427 8.19      
5 A1 1306 1253 5.20      
6 A1 881 845 58.62      
7 A1 620 595 2.14      
8 A1 241 231 2.01      
9 A2 3125 2998 0.00      
10 A2 1467 1407 0.00      
11 A2 691 663 0.00      
12 A2 148 142 0.00      
13 E 3126 2999 19.43      
13 E 3126 2999 19.45      
14 E 3120 2993 1.28      
14 E 3120 2993 1.29      
15 E 3046 2922 7.73      
15 E 3046 2922 7.73      
16 E 1480 1420 2.28      
16 E 1480 1420 2.28      
17 E 1471 1411 0.08      
17 E 1471 1411 0.08      
18 E 1297 1244 29.11      
18 E 1297 1244 29.11      
19 E 927 889 162.26      
19 E 927 889 162.28      
20 E 860 825 17.60      
20 E 860 825 17.62      
21 E 713 684 14.95      
21 E 713 684 14.94      
22 E 626 601 10.11      
22 E 626 600 10.12      
23 E 203 194 0.96      
23 E 203 194 0.96      
24 E 164 158 0.00      
24 E 164 158 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26198.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 25134.9 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B2PLYP/cc-pVTZ
ABC
0.17625 0.17625 0.10398

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.327
H2 0.000 0.000 1.838
C3 0.000 1.547 -0.200
C4 1.340 -0.773 -0.200
C5 -1.340 -0.773 -0.200
H6 0.000 1.561 -1.241
H7 1.352 -0.780 -1.241
H8 -1.352 -0.780 -1.241
H9 -0.853 2.046 0.150
H10 0.853 2.046 0.150
H11 2.198 -0.284 0.150
H12 1.345 -1.761 0.150
H13 -1.345 -1.761 0.150
H14 -2.198 -0.284 0.150

Atom - Atom Distances (Å)
  Si1 H2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13 H14
Si11.51141.63411.63411.63412.21242.21242.21242.22342.22342.22342.22342.22342.2234
H21.51142.55872.55872.55873.45233.45233.45232.78632.78632.78632.78632.78632.7863
C31.63412.55872.67932.67931.04132.88582.88581.04801.04802.88223.58843.58842.8822
C41.63412.55872.67932.67932.88581.04132.88583.58842.88221.04801.04802.88223.5884
C51.63412.55872.67932.67932.88582.88581.04132.88223.58843.58842.88221.04801.0480
H62.21243.45231.04132.88582.88582.70362.70361.70191.70193.18923.84473.84473.1892
H72.21243.45232.88581.04132.88582.70362.70363.84473.18921.70191.70193.18923.8447
H82.21243.45232.88582.88581.04132.70362.70363.18923.84473.84473.18921.70191.7019
H92.22342.78631.04803.58842.88221.70193.84473.18921.70553.83894.39613.83892.6906
H102.22342.78631.04802.88223.58841.70193.18923.84471.70552.69063.83894.39613.8389
H112.22342.78632.88221.04803.58843.18921.70193.84473.83892.69061.70553.83894.3961
H122.22342.78633.58841.04802.88223.84471.70193.18924.39613.83891.70552.69063.8389
H132.22342.78633.58842.88221.04803.84473.18921.70193.83894.39613.83892.69061.7055
H142.22342.78632.88223.58841.04803.18923.84471.70192.69063.83894.39613.83891.7055

picture of trimethylsilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 C3 H6 109.574 Si1 C3 H9 110.063
Si1 C3 H10 110.063 Si1 C4 H7 109.574
Si1 C4 H11 110.063 Si1 C4 H12 110.063
Si1 C5 H8 109.574 Si1 C5 H13 110.063
Si1 C5 H14 110.063 H2 Si1 C3 108.803
H2 Si1 C4 108.803 H2 Si1 C5 108.803
C3 Si1 C4 110.131 C3 Si1 C5 110.131
C4 Si1 C5 110.131 H6 C3 H9 109.098
H6 C3 H10 109.098 H7 C4 H11 109.098
H7 C4 H12 109.098 H8 C5 H13 109.098
H8 C5 H14 109.098 H9 C3 H10 108.921
H11 C4 H12 108.921 H13 C5 H14 108.921
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.409      
2 H -0.075      
3 C -0.414      
4 C -0.414      
5 C -0.414      
6 H 0.100      
7 H 0.100      
8 H 0.100      
9 H 0.101      
10 H 0.101      
11 H 0.101      
12 H 0.101      
13 H 0.101      
14 H 0.101      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.649 0.000 0.000
y 0.000 9.649 0.000
z 0.000 0.000 8.547


<r2> (average value of r2) Å2
<r2> 138.660
(<r2>)1/2 11.775