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All results from a given calculation for C3H8 (Propane)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-117.902084
Energy at 298.15K-117.910555
HF Energy-117.612672
Nuclear repulsion energy81.964719
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 CISD/3-21G*
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 3155 2949 46.70      
2 A1 3097 2894 7.82      
3 A1 3090 2888 23.69      
4 A1 1616 1510 5.08      
5 A1 1598 1493 0.37      
6 A1 1514 1414 4.34      
7 A1 1239 1158 2.02      
8 A1 869 812 0.83      
9 A1 386 360 0.20      
10 A2 3147 2940 0.00      
11 A2 1599 1494 0.00      
12 A2 1393 1302 0.00      
13 A2 978 914 0.00      
14 A2 233 218 0.00      
15 B1 3162 2954 85.29      
16 B1 3121 2916 0.48      
17 B1 1615 1509 12.92      
18 B1 1292 1207 0.47      
19 B1 788 737 4.58      
20 B1 281 263 0.00      
21 B2 3152 2945 25.15      
22 B2 3086 2883 27.09      
23 B2 1605 1499 2.57      
24 B2 1496 1398 4.50      
25 B2 1440 1346 1.86      
26 B2 1060 990 2.08      
27 B2 983 918 2.56      

Unscaled Zero Point Vibrational Energy (zpe) 23497.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 21955.8 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 CISD/3-21G*
ABC
0.96010 0.27804 0.24535

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.603
C2 0.000 1.282 -0.267
C3 0.000 -1.282 -0.267
H4 0.882 0.000 1.253
H5 -0.882 0.000 1.253
H6 0.000 2.182 0.356
H7 0.000 -2.182 0.356
H8 0.887 1.305 -0.908
H9 -0.887 1.305 -0.908
H10 -0.887 -1.305 -0.908
H11 0.887 -1.305 -0.908

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10 H11
C11.54921.54921.09541.09542.19562.19562.18522.18522.18522.1852
C21.54922.56352.17492.17491.09433.51891.09491.09492.80902.8090
C31.54922.56352.17492.17493.51891.09432.80902.80901.09491.0949
H41.09542.17492.17491.76422.51832.51832.52463.08273.08272.5246
H51.09542.17492.17491.76422.51832.51833.08272.52462.52463.0827
H62.19561.09433.51892.51832.51834.36331.77571.77573.81353.8135
H72.19563.51891.09432.51832.51834.36333.81353.81351.77571.7757
H82.18521.09492.80902.52463.08271.77573.81351.77403.15612.6103
H92.18521.09492.80903.08272.52461.77573.81351.77402.61033.1561
H102.18522.80901.09493.08272.52463.81351.77573.15612.61031.7740
H112.18522.80901.09492.52463.08273.81351.77572.61033.15611.7740

picture of Propane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.143 C1 C2 H8 110.289
C1 C2 H9 110.289 C1 C3 H7 111.143
C1 C3 H10 110.289 C1 C3 H11 110.289
C2 C1 C3 111.653 C2 C1 H4 109.452
C2 C1 H5 109.452 C3 C1 H4 109.452
C3 C1 H5 109.452 H4 C1 H5 107.280
H6 C2 H8 108.409 H6 C2 H9 108.409
H7 C3 H10 108.409 H7 C3 H11 108.409
H8 C2 H9 108.219 H10 C3 H11 108.219
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability