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 CH3CH2COOH (Propanoic Acid)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-267.791952
Energy at 298.15K-267.799149
HF Energy-266.877117
Nuclear repulsion energy178.735559
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 MP2/6-31G(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 A' 3793 3582 69.19      
2 A' 3217 3039 11.38      
3 A' 3123 2950 15.17      
4 A' 3121 2947 3.63      
5 A' 1848 1745 207.37      
6 A' 1530 1445 10.54      
7 A' 1487 1404 13.26      
8 A' 1441 1361 12.93      
9 A' 1430 1351 55.46      
10 A' 1323 1249 1.93      
11 A' 1184 1118 222.34      
12 A' 1107 1046 57.78      
13 A' 1028 971 2.35      
14 A' 836 790 9.06      
15 A' 616 582 20.96      
16 A' 469 443 19.88      
17 A' 251 238 2.58      
18 A" 3223 3045 9.69      
19 A" 3169 2993 1.56      
20 A" 1524 1440 6.14      
21 A" 1296 1224 0.07      
22 A" 1121 1058 0.24      
23 A" 818 773 16.46      
24 A" 674 637 85.70      
25 A" 530 501 20.18      
26 A" 217 205 0.00      
27 A" 54 51 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20214.7 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 19092.8 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 MP2/6-31G(2df,p)
ABC
0.33787 0.12894 0.09663

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.568 0.000
C2 -0.609 -0.809 0.000
C3 0.452 -1.900 0.000
O4 -0.958 1.523 0.000
O5 1.181 0.821 0.000
H6 -1.265 -0.879 0.872
H7 -1.265 -0.879 -0.872
H8 -0.013 -2.886 0.000
H9 1.090 -1.816 -0.879
H10 1.090 -1.816 0.879
H11 -0.477 2.363 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.50562.50851.35331.20812.11022.11023.45392.76462.76461.8579
C21.50561.52132.35862.42151.09321.09322.16092.16182.16183.1752
C32.50851.52133.70212.81732.17922.17921.09011.08941.08944.3631
O41.35332.35863.70212.25172.57392.57394.50984.01504.01500.9680
O51.20812.42152.81732.25173.10413.10413.89492.78132.78132.2644
H62.11021.09322.17922.57393.10411.74322.52143.08042.53503.4486
H72.11021.09322.17922.57393.10411.74322.52142.53503.08043.4486
H83.45392.16091.09014.50983.89492.52142.52141.77011.77015.2700
H92.76462.16181.08944.01502.78133.08042.53501.77011.75714.5492
H102.76462.16181.08944.01502.78132.53503.08041.77011.75714.5492
H111.85793.17524.36310.96802.26443.44863.44865.27004.54924.5492

picture of Propanoic Acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.940 C1 C2 H6 107.527
C1 C2 H7 107.527 C1 O4 H11 105.116
C2 C1 O4 111.063 C2 C1 O5 125.977
C2 C3 H8 110.603 C2 C3 H9 110.709
C2 C3 H10 110.709 C3 C2 H6 111.879
C3 C2 H7 111.879 O4 C1 O5 122.961
H6 C2 H7 105.750 H8 C3 H9 108.616
H8 C3 H10 108.616 H9 C3 H10 107.495
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability