return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-409.885702
Energy at 298.15K-409.895291
HF Energy-409.885702
Nuclear repulsion energy174.421837
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 B3LYP/6-31G(2df,p)
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 3106 2997 34.65      
2 A1 3032 2926 2.23      
3 A1 2170 2094 152.82      
4 A1 1476 1425 4.97      
5 A1 1300 1254 3.47      
6 A1 876 845 65.55      
7 A1 609 588 1.63      
8 A1 239 230 0.75      
9 A2 3108 2999 0.00      
10 A2 1456 1405 0.00      
11 A2 685 661 0.00      
12 A2 147 142 0.00      
13 E 3109 3000 20.11      
13 E 3109 3000 20.12      
14 E 3104 2995 0.69      
14 E 3104 2995 0.68      
15 E 3031 2925 6.67      
15 E 3031 2925 6.68      
16 E 1469 1417 1.10      
16 E 1469 1417 1.10      
17 E 1459 1407 0.05      
17 E 1459 1407 0.05      
18 E 1290 1245 19.39      
18 E 1290 1245 19.38      
19 E 923 891 161.66      
19 E 923 891 161.67      
20 E 855 825 19.51      
20 E 855 825 19.52      
21 E 702 678 12.91      
21 E 702 678 12.90      
22 E 621 599 6.96      
22 E 621 599 6.97      
23 E 203 195 0.48      
23 E 203 195 0.48      
24 E 158 153 0.00      
24 E 158 153 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26023.3 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 25112.5 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 B3LYP/6-31G(2df,p)
ABC
0.17573 0.17573 0.10348

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.373
H2 0.000 0.000 1.866
C3 0.000 1.789 -0.221
C4 1.549 -0.894 -0.221
C5 -1.549 -0.894 -0.221
H6 0.000 1.845 -1.315
H7 1.598 -0.922 -1.315
H8 -1.598 -0.922 -1.315
H9 -0.883 2.326 0.139
H10 0.883 2.326 0.139
H11 2.456 -0.398 0.139
H12 1.573 -1.928 0.139
H13 -1.573 -1.928 0.139
H14 -2.456 -0.398 0.139

Atom - Atom Distances (Å)
  Si1 H2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13 H14
Si11.49321.88461.88461.88462.50042.50042.50042.49932.49932.49932.49932.49932.4993
H21.49322.74852.74852.74853.67723.67723.67723.02903.02903.02903.02903.02903.0290
C31.88462.74853.09803.09801.09553.33163.33161.09501.09503.30824.05194.05193.3082
C41.88462.74853.09803.09803.33161.09553.33164.05193.30821.09501.09503.30824.0519
C51.88462.74853.09803.09803.33163.33161.09553.30824.05194.05193.30821.09501.0950
H62.50043.67721.09553.33163.33163.19553.19551.76801.76803.63014.33864.33863.6301
H72.50043.67723.33161.09553.33163.19553.19554.33863.63011.76801.76803.63014.3386
H82.50043.67723.33163.33161.09553.19553.19553.63014.33864.33863.63011.76801.7680
H92.49933.02901.09504.05193.30821.76804.33863.63011.76694.30994.91264.30993.1457
H102.49933.02901.09503.30824.05191.76803.63014.33861.76693.14574.30994.91264.3099
H112.49933.02903.30821.09504.05193.63011.76804.33864.30993.14571.76694.30994.9126
H122.49933.02904.05191.09503.30824.33861.76803.63014.91264.30991.76693.14574.3099
H132.49933.02904.05193.30821.09504.33863.63011.76804.30994.91264.30993.14571.7669
H142.49933.02903.30824.05191.09503.63014.33861.76803.14574.30994.91264.30991.7669

picture of trimethylsilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 C3 H6 111.308 Si1 C3 H9 111.251
Si1 C3 H10 111.251 Si1 C4 H7 111.308
Si1 C4 H11 111.251 Si1 C4 H12 111.251
Si1 C5 H8 111.308 Si1 C5 H13 111.251
Si1 C5 H14 111.251 H2 Si1 C3 108.364
H2 Si1 C4 108.364 H2 Si1 C5 108.364
C3 Si1 C4 110.556 C3 Si1 C5 110.556
C4 Si1 C5 110.556 H6 C3 H9 107.633
H6 C3 H10 107.633 H7 C4 H11 107.633
H7 C4 H12 107.632 H8 C5 H13 107.632
H8 C5 H14 107.633 H9 C3 H10 107.577
H11 C4 H12 107.577 H13 C5 H14 107.577
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability