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 C3H8 (Propane)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-21.119785
Energy at 298.15K-21.128286
HF Energy-21.119785
Nuclear repulsion energy49.599164
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 HF/CEP-31G*
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 3273 2939 135.63 80.39 0.61 0.76
2 A1 3221 2892 9.34 314.47 0.06 0.12
3 A1 3206 2879 66.78 94.49 0.03 0.05
4 A1 1639 1472 2.66 2.01 0.34 0.50
5 A1 1616 1451 0.38 37.85 0.74 0.85
6 A1 1549 1391 1.23 4.28 0.03 0.06
7 A1 1271 1141 1.31 8.66 0.48 0.65
8 A1 929 834 0.45 17.92 0.21 0.35
9 A1 385 345 0.01 0.50 0.38 0.55
10 A2 3265 2932 0.00 4.92 0.75 0.86
11 A2 1616 1451 0.00 31.60 0.75 0.86
12 A2 1418 1274 0.00 16.29 0.75 0.86
13 A2 967 869 0.00 0.58 0.75 0.86
14 A2 234 210 0.00 0.03 0.75 0.86
15 B1 3283 2948 239.09 16.99 0.75 0.86
16 B1 3242 2911 0.78 172.71 0.75 0.86
17 B1 1633 1466 10.29 0.39 0.75 0.86
18 B1 1307 1173 0.11 0.60 0.75 0.86
19 B1 786 706 1.71 0.06 0.75 0.86
20 B1 289 260 0.00 0.02 0.75 0.86
21 B2 3267 2934 52.77 55.34 0.75 0.86
22 B2 3204 2878 74.10 9.51 0.75 0.86
23 B2 1623 1457 0.49 0.00 0.75 0.86
24 B2 1551 1392 2.37 0.12 0.75 0.86
25 B2 1477 1327 5.23 0.27 0.75 0.86
26 B2 1125 1010 0.32 11.62 0.75 0.86
27 B2 995 894 0.95 0.45 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 24184.5 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 21717.7 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 HF/CEP-31G*
ABC
0.97367 0.27843 0.24618

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.595
C2 0.000 1.280 -0.263
C3 0.000 -1.280 -0.263
H4 0.876 0.000 1.248
H5 -0.876 0.000 1.248
H6 0.000 2.176 0.361
H7 0.000 -2.176 0.361
H8 0.883 1.319 -0.907
H9 -0.883 1.319 -0.907
H10 -0.883 -1.319 -0.907
H11 0.883 -1.319 -0.907

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10 H11
C11.54071.54071.09291.09292.18882.18882.18502.18502.18502.1850
C21.54072.55922.16532.16531.09253.51181.09331.09332.81882.8188
C31.54072.55922.16532.16533.51181.09252.81882.81881.09331.0933
H41.09292.16532.16531.75302.50822.50822.52633.07853.07852.5263
H51.09292.16532.16531.75302.50822.50823.07852.52632.52633.0785
H62.18881.09253.51182.50822.50824.35261.76701.76703.82133.8213
H72.18883.51181.09252.50822.50824.35263.82133.82131.76701.7670
H82.18501.09332.81882.52633.07851.76703.82131.76553.17392.6376
H92.18501.09332.81883.07852.52631.76703.82131.76552.63763.1739
H102.18502.81881.09333.07852.52633.82131.76703.17392.63761.7655
H112.18502.81881.09332.52633.07853.82131.76702.63763.17391.7655

picture of Propane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.314 C1 C2 H8 110.963
C1 C2 H9 110.963 C1 C3 H7 111.314
C1 C3 H10 110.963 C1 C3 H11 110.963
C2 C1 C3 112.306 C2 C1 H4 109.433
C2 C1 H5 109.433 C3 C1 H4 109.433
C3 C1 H5 109.433 H4 C1 H5 106.641
H6 C2 H8 107.878 H6 C2 H9 107.878
H7 C3 H10 107.878 H7 C3 H11 107.878
H8 C2 H9 107.690 H10 C3 H11 107.690
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.052      
2 C -0.369      
3 C -0.369      
4 H 0.076      
5 H 0.076      
6 H 0.128      
7 H 0.128      
8 H 0.095      
9 H 0.095      
10 H 0.095      
11 H 0.095      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.067 0.067
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.092 0.000 0.000
y 0.000 -22.311 0.000
z 0.000 0.000 -21.712
Traceless
 xyz
x 0.920 0.000 0.000
y 0.000 -0.909 0.000
z 0.000 0.000 -0.011
Polar
3z2-r2-0.022
x2-y21.219
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.336 0.000 0.000
y 0.000 5.153 0.000
z 0.000 0.000 4.521


<r2> (average value of r2) Å2
<r2> 56.373
(<r2>)1/2 7.508